Untitled

#ifndef _LINUX_SCHED_H

#define _LINUX_SCHED_H

 

/*

 * cloning flags:

 */

#define CSIGNAL         0x000000ff      /* signal mask to be sent at exit */

#define CLONE_VM        0x00000100      /* set if VM shared between processes */

#define CLONE_FS        0x00000200      /* set if fs info shared between processes */

#define CLONE_FILES     0x00000400      /* set if open files shared between processes */

#define CLONE_SIGHAND   0x00000800      /* set if signal handlers and blocked signals shared */

#define CLONE_PTRACE    0x00002000      /* set if we want to let tracing continue on the child too */

#define CLONE_VFORK     0x00004000      /* set if the parent wants the child to wake it up on mm_release */

#define CLONE_PARENT    0x00008000      /* set if we want to have the same parent as the cloner */

#define CLONE_THREAD    0x00010000      /* Same thread group? */

#define CLONE_NEWNS     0x00020000      /* New namespace group? */

#define CLONE_SYSVSEM   0x00040000      /* share system V SEM_UNDO semantics */

#define CLONE_SETTLS    0x00080000      /* create a new TLS for the child */

#define CLONE_PARENT_SETTID     0x00100000      /* set the TID in the parent */

#define CLONE_CHILD_CLEARTID    0x00200000      /* clear the TID in the child */

#define CLONE_DETACHED          0x00400000      /* Unused, ignored */

#define CLONE_UNTRACED          0x00800000      /* set if the tracing process can't force CLONE_PTRACE on this clone */

#define CLONE_CHILD_SETTID      0x01000000      /* set the TID in the child */

#define CLONE_STOPPED           0x02000000      /* Start in stopped state */

#define CLONE_NEWUTS            0x04000000      /* New utsname group? */

#define CLONE_NEWIPC            0x08000000      /* New ipcs */

#define CLONE_NEWUSER           0x10000000      /* New user namespace */

#define CLONE_NEWPID            0x20000000      /* New pid namespace */

#define CLONE_NEWNET            0x40000000      /* New network namespace */

#define CLONE_IO                0x80000000      /* Clone io context */

 

/*

 * Scheduling policies

 */

#define SCHED_NORMAL            0

#define SCHED_FIFO              1

#define SCHED_RR                2

#define SCHED_BATCH             3

/* SCHED_ISO: reserved but not implemented yet */

#define SCHED_IDLE              5

/* Can be ORed in to make sure the process is reverted back to SCHED_NORMAL on fork */

#define SCHED_RESET_ON_FORK     0x40000000

 

#ifdef __KERNEL__

 

struct sched_param {

        int sched_priority;

};

 

#include <asm/param.h>  /* for HZ */

 

#include <linux/capability.h>

#include <linux/threads.h>

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/timex.h>

#include <linux/jiffies.h>

#include <linux/rbtree.h>

#include <linux/thread_info.h>

#include <linux/cpumask.h>

#include <linux/errno.h>

#include <linux/nodemask.h>

#include <linux/mm_types.h>

 

#include <asm/system.h>

#include <asm/page.h>

#include <asm/ptrace.h>

#include <asm/cputime.h>

 

#include <linux/smp.h>

#include <linux/sem.h>

#include <linux/signal.h>

#include <linux/path.h>

#include <linux/compiler.h>

#include <linux/completion.h>

#include <linux/pid.h>

#include <linux/percpu.h>

#include <linux/topology.h>

#include <linux/proportions.h>

#include <linux/seccomp.h>

#include <linux/rcupdate.h>

#include <linux/rculist.h>

#include <linux/rtmutex.h>

 

#include <linux/time.h>

#include <linux/param.h>

#include <linux/resource.h>

#include <linux/timer.h>

#include <linux/hrtimer.h>

#include <linux/task_io_accounting.h>

#include <linux/kobject.h>

#include <linux/latencytop.h>

#include <linux/cred.h>

 

#include <asm/processor.h>

 

struct exec_domain;

struct futex_pi_state;

struct robust_list_head;

struct bio_list;

struct fs_struct;

struct perf_event_context;

 

/*

 * List of flags we want to share for kernel threads,

 * if only because they are not used by them anyway.

 */

#define CLONE_KERNEL    (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)

 

/*

 * These are the constant used to fake the fixed-point load-average

 * counting. Some notes:

 *  - 11 bit fractions expand to 22 bits by the multiplies: this gives

 *    a load-average precision of 10 bits integer + 11 bits fractional

 *  - if you want to count load-averages more often, you need more

 *    precision, or rounding will get you. With 2-second counting freq,

 *    the EXP_n values would be 1981, 2034 and 2043 if still using only

 *    11 bit fractions.

 */

extern unsigned long avenrun[];         /* Load averages */

extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);

 

#define FSHIFT          11              /* nr of bits of precision */

#define FIXED_1         (1<<FSHIFT)     /* 1.0 as fixed-point */

#define LOAD_FREQ       (5*HZ+1)        /* 5 sec intervals */

#define EXP_1           1884            /* 1/exp(5sec/1min) as fixed-point */

#define EXP_5           2014            /* 1/exp(5sec/5min) */

#define EXP_15          2037            /* 1/exp(5sec/15min) */

 

#define CALC_LOAD(load,exp,n) \

        load *= exp; \

        load += n*(FIXED_1-exp); \

        load >>= FSHIFT;

 

extern unsigned long total_forks;

extern int nr_threads;

DECLARE_PER_CPU(unsigned long, process_counts);

extern int nr_processes(void);

extern unsigned long nr_running(void);

extern unsigned long nr_uninterruptible(void);

extern unsigned long nr_iowait(void);

extern unsigned long nr_iowait_cpu(int cpu);

extern unsigned long this_cpu_load(void);

 

 

extern void calc_global_load(void);

 

extern unsigned long get_parent_ip(unsigned long addr);

 

struct seq_file;

struct cfs_rq;

struct task_group;

#ifdef CONFIG_SCHED_DEBUG

extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);

extern void proc_sched_set_task(struct task_struct *p);

extern void

print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);

#else

static inline void

proc_sched_show_task(struct task_struct *p, struct seq_file *m)

{

}

static inline void proc_sched_set_task(struct task_struct *p)

{

}

static inline void

print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)

{

}

#endif

 

/*

 * Task state bitmask. NOTE! These bits are also

 * encoded in fs/proc/array.c: get_task_state().

 *

 * We have two separate sets of flags: task->state

 * is about runnability, while task->exit_state are

 * about the task exiting. Confusing, but this way

 * modifying one set can't modify the other one by

 * mistake.

 */

#define TASK_RUNNING            0

#define TASK_INTERRUPTIBLE      1

#define TASK_UNINTERRUPTIBLE    2

#define __TASK_STOPPED          4

#define __TASK_TRACED           8

/* in tsk->exit_state */

#define EXIT_ZOMBIE             16

#define EXIT_DEAD               32

/* in tsk->state again */

#define TASK_DEAD               64

#define TASK_WAKEKILL           128

#define TASK_WAKING             256

#define TASK_STATE_MAX          512

 

#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKW"

 

extern char ___assert_task_state[1 - 2*!!(

                sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1)];

 

/* Convenience macros for the sake of set_task_state */

#define TASK_KILLABLE           (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)

#define TASK_STOPPED            (TASK_WAKEKILL | __TASK_STOPPED)

#define TASK_TRACED             (TASK_WAKEKILL | __TASK_TRACED)

 

/* Convenience macros for the sake of wake_up */

#define TASK_NORMAL             (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)

#define TASK_ALL                (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED)

 

/* get_task_state() */

#define TASK_REPORT             (TASK_RUNNING | TASK_INTERRUPTIBLE | \

                                 TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \

                                 __TASK_TRACED)

 

#define task_is_traced(task)    ((task->state & __TASK_TRACED) != 0)

#define task_is_stopped(task)   ((task->state & __TASK_STOPPED) != 0)

#define task_is_dead(task)      ((task)->exit_state != 0)

#define task_is_stopped_or_traced(task) \

                        ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0)

#define task_contributes_to_load(task)  \

                                ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \

                                 (task->flags & PF_FREEZING) == 0)

 

#define __set_task_state(tsk, state_value)              \

        do { (tsk)->state = (state_value); } while (0)

#define set_task_state(tsk, state_value)                \

        set_mb((tsk)->state, (state_value))

 

/*

 * set_current_state() includes a barrier so that the write of current->state

 * is correctly serialised wrt the caller's subsequent test of whether to

 * actually sleep:

 *

 *      set_current_state(TASK_UNINTERRUPTIBLE);

 *      if (do_i_need_to_sleep())

 *              schedule();

 *

 * If the caller does not need such serialisation then use __set_current_state()

 */

#define __set_current_state(state_value)                        \

        do { current->state = (state_value); } while (0)

#define set_current_state(state_value)          \

        set_mb(current->state, (state_value))

 

/* Task command name length */

#define TASK_COMM_LEN 16

 

#include <linux/spinlock.h>

 

/*

 * This serializes "schedule()" and also protects

 * the run-queue from deletions/modifications (but

 * _adding_ to the beginning of the run-queue has

 * a separate lock).

 */

extern rwlock_t tasklist_lock;

extern spinlock_t mmlist_lock;

 

struct task_struct;

 

#ifdef CONFIG_PROVE_RCU

extern int lockdep_tasklist_lock_is_held(void);

#endif /* #ifdef CONFIG_PROVE_RCU */

 

extern void sched_init(void);

extern void sched_init_smp(void);

extern asmlinkage void schedule_tail(struct task_struct *prev);

extern void init_idle(struct task_struct *idle, int cpu);

extern void init_idle_bootup_task(struct task_struct *idle);

 

extern int runqueue_is_locked(int cpu);

 

extern cpumask_var_t nohz_cpu_mask;

#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)

extern void select_nohz_load_balancer(int stop_tick);

extern int get_nohz_timer_target(void);

#else

static inline void select_nohz_load_balancer(int stop_tick) { }

#endif

 

/*

 * Only dump TASK_* tasks. (0 for all tasks)

 */

extern void show_state_filter(unsigned long state_filter);

 

static inline void show_state(void)

{

        show_state_filter(0);

}

 

extern void show_regs(struct pt_regs *);

 

/*

 * TASK is a pointer to the task whose backtrace we want to see (or NULL for current

 * task), SP is the stack pointer of the first frame that should be shown in the back

 * trace (or NULL if the entire call-chain of the task should be shown).

 */

extern void show_stack(struct task_struct *task, unsigned long *sp);

 

void io_schedule(void);

long io_schedule_timeout(long timeout);

 

extern void cpu_init (void);

extern void trap_init(void);

extern void update_process_times(int user);

extern void scheduler_tick(void);

 

extern void sched_show_task(struct task_struct *p);

 

#ifdef CONFIG_LOCKUP_DETECTOR

extern void touch_softlockup_watchdog(void);

extern void touch_softlockup_watchdog_sync(void);

extern void touch_all_softlockup_watchdogs(void);

extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,

                                  void __user *buffer,

                                  size_t *lenp, loff_t *ppos);

extern unsigned int  softlockup_panic;

extern int softlockup_thresh;

#else

static inline void touch_softlockup_watchdog(void)

{

}

static inline void touch_softlockup_watchdog_sync(void)

{

}

static inline void touch_all_softlockup_watchdogs(void)

{

}

#endif

 

#ifdef CONFIG_DETECT_HUNG_TASK

extern unsigned int  sysctl_hung_task_panic;

extern unsigned long sysctl_hung_task_check_count;

extern unsigned long sysctl_hung_task_timeout_secs;

extern unsigned long sysctl_hung_task_warnings;

extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,

                                         void __user *buffer,

                                         size_t *lenp, loff_t *ppos);

#endif

 

/* Attach to any functions which should be ignored in wchan output. */

#define __sched         __attribute__((__section__(".sched.text")))

 

/* Linker adds these: start and end of __sched functions */

extern char __sched_text_start[], __sched_text_end[];

 

/* Is this address in the __sched functions? */

extern int in_sched_functions(unsigned long addr);

 

#define MAX_SCHEDULE_TIMEOUT    LONG_MAX

extern signed long schedule_timeout(signed long timeout);

extern signed long schedule_timeout_interruptible(signed long timeout);

extern signed long schedule_timeout_killable(signed long timeout);

extern signed long schedule_timeout_uninterruptible(signed long timeout);

asmlinkage void schedule(void);

extern int mutex_spin_on_owner(struct mutex *lock, struct thread_info *owner);

 

struct nsproxy;

struct user_namespace;

 

/*

 * Default maximum number of active map areas, this limits the number of vmas

 * per mm struct. Users can overwrite this number by sysctl but there is a

 * problem.

 *

 * When a program's coredump is generated as ELF format, a section is created

 * per a vma. In ELF, the number of sections is represented in unsigned short.

 * This means the number of sections should be smaller than 65535 at coredump.

 * Because the kernel adds some informative sections to a image of program at

 * generating coredump, we need some margin. The number of extra sections is

 * 1-3 now and depends on arch. We use "5" as safe margin, here.

 */

#define MAPCOUNT_ELF_CORE_MARGIN        (5)

#define DEFAULT_MAX_MAP_COUNT   (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)

 

extern int sysctl_max_map_count;

 

#include <linux/aio.h>

 

#ifdef CONFIG_MMU

extern void arch_pick_mmap_layout(struct mm_struct *mm);

extern unsigned long

arch_get_unmapped_area(struct file *, unsigned long, unsigned long,

                       unsigned long, unsigned long);

extern unsigned long

arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,

                          unsigned long len, unsigned long pgoff,

                          unsigned long flags);

extern void arch_unmap_area(struct mm_struct *, unsigned long);

extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);

#else

static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}

#endif

 

 

extern void set_dumpable(struct mm_struct *mm, int value);

extern int get_dumpable(struct mm_struct *mm);

 

/* mm flags */

/* dumpable bits */

#define MMF_DUMPABLE      0  /* core dump is permitted */

#define MMF_DUMP_SECURELY 1  /* core file is readable only by root */

 

#define MMF_DUMPABLE_BITS 2

#define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)

 

/* coredump filter bits */

#define MMF_DUMP_ANON_PRIVATE   2

#define MMF_DUMP_ANON_SHARED    3

#define MMF_DUMP_MAPPED_PRIVATE 4

#define MMF_DUMP_MAPPED_SHARED  5

#define MMF_DUMP_ELF_HEADERS    6

#define MMF_DUMP_HUGETLB_PRIVATE 7

#define MMF_DUMP_HUGETLB_SHARED  8

 

#define MMF_DUMP_FILTER_SHIFT   MMF_DUMPABLE_BITS

#define MMF_DUMP_FILTER_BITS    7

#define MMF_DUMP_FILTER_MASK \

        (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)

#define MMF_DUMP_FILTER_DEFAULT \

        ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\

         (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)

 

#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS

# define MMF_DUMP_MASK_DEFAULT_ELF      (1 << MMF_DUMP_ELF_HEADERS)

#else

# define MMF_DUMP_MASK_DEFAULT_ELF      0

#endif

                                        /* leave room for more dump flags */

#define MMF_VM_MERGEABLE        16      /* KSM may merge identical pages */

 

#define MMF_INIT_MASK           (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)

 

struct sighand_struct {

        atomic_t                count;

        struct k_sigaction      action[_NSIG];

        spinlock_t              siglock;

        wait_queue_head_t       signalfd_wqh;

};

 

struct pacct_struct {

        int                     ac_flag;

        long                    ac_exitcode;

        unsigned long           ac_mem;

        cputime_t               ac_utime, ac_stime;

        unsigned long           ac_minflt, ac_majflt;

};

 

struct cpu_itimer {

        cputime_t expires;

        cputime_t incr;

        u32 error;

        u32 incr_error;

};

 

/**

 * struct task_cputime - collected CPU time counts

 * @utime:              time spent in user mode, in &cputime_t units

 * @stime:              time spent in kernel mode, in &cputime_t units

 * @sum_exec_runtime:   total time spent on the CPU, in nanoseconds

 *

 * This structure groups together three kinds of CPU time that are

 * tracked for threads and thread groups.  Most things considering

 * CPU time want to group these counts together and treat all three

 * of them in parallel.

 */

struct task_cputime {

        cputime_t utime;

        cputime_t stime;

        unsigned long long sum_exec_runtime;

};

/* Alternate field names when used to cache expirations. */

#define prof_exp        stime

#define virt_exp        utime

#define sched_exp       sum_exec_runtime

 

#define INIT_CPUTIME    \

        (struct task_cputime) {                                 \

                .utime = cputime_zero,                          \

                .stime = cputime_zero,                          \

                .sum_exec_runtime = 0,                          \

        }

 

/*

 * Disable preemption until the scheduler is running.

 * Reset by start_kernel()->sched_init()->init_idle().

 *

 * We include PREEMPT_ACTIVE to avoid cond_resched() from working

 * before the scheduler is active -- see should_resched().

 */

#define INIT_PREEMPT_COUNT      (1 + PREEMPT_ACTIVE)

 

/**

 * struct thread_group_cputimer - thread group interval timer counts

 * @cputime:            thread group interval timers.

 * @running:            non-zero when there are timers running and

 *                      @cputime receives updates.

 * @lock:               lock for fields in this struct.

 *

 * This structure contains the version of task_cputime, above, that is

 * used for thread group CPU timer calculations.

 */

struct thread_group_cputimer {

        struct task_cputime cputime;

        int running;

        spinlock_t lock;

};

 

struct autogroup;

 

/*

 * NOTE! "signal_struct" does not have it's own

 * locking, because a shared signal_struct always

 * implies a shared sighand_struct, so locking

 * sighand_struct is always a proper superset of

 * the locking of signal_struct.

 */

struct signal_struct {

        atomic_t                sigcnt;

        atomic_t                live;

        int                     nr_threads;

 

        wait_queue_head_t       wait_chldexit;  /* for wait4() */

 

        /* current thread group signal load-balancing target: */

        struct task_struct      *curr_target;

 

        /* shared signal handling: */

        struct sigpending       shared_pending;

 

        /* thread group exit support */

        int                     group_exit_code;

        /* overloaded:

         * - notify group_exit_task when ->count is equal to notify_count

         * - everyone except group_exit_task is stopped during signal delivery

         *   of fatal signals, group_exit_task processes the signal.

         */

        int                     notify_count;

        struct task_struct      *group_exit_task;

 

        /* thread group stop support, overloads group_exit_code too */

        int                     group_stop_count;

        unsigned int            flags; /* see SIGNAL_* flags below */

 

        /* POSIX.1b Interval Timers */

        struct list_head posix_timers;

 

        /* ITIMER_REAL timer for the process */

        struct hrtimer real_timer;

        struct pid *leader_pid;

        ktime_t it_real_incr;

 

        /*

         * ITIMER_PROF and ITIMER_VIRTUAL timers for the process, we use

         * CPUCLOCK_PROF and CPUCLOCK_VIRT for indexing array as these

         * values are defined to 0 and 1 respectively

         */

        struct cpu_itimer it[2];

 

        /*

         * Thread group totals for process CPU timers.

         * See thread_group_cputimer(), et al, for details.

         */

        struct thread_group_cputimer cputimer;

 

        /* Earliest-expiration cache. */

        struct task_cputime cputime_expires;

 

        struct list_head cpu_timers[3];

 

        struct pid *tty_old_pgrp;

 

        /* boolean value for session group leader */

        int leader;

 

        struct tty_struct *tty; /* NULL if no tty */

 

#ifdef CONFIG_SCHED_AUTOGROUP

        struct autogroup *autogroup;

#endif

        /*

         * Cumulative resource counters for dead threads in the group,

         * and for reaped dead child processes forked by this group.

         * Live threads maintain their own counters and add to these

         * in __exit_signal, except for the group leader.

         */

        cputime_t utime, stime, cutime, cstime;

        cputime_t gtime;

        cputime_t cgtime;

#ifndef CONFIG_VIRT_CPU_ACCOUNTING

        cputime_t prev_utime, prev_stime;

#endif

        unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;

        unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;

        unsigned long inblock, oublock, cinblock, coublock;

        unsigned long maxrss, cmaxrss;

        struct task_io_accounting ioac;

 

        /*

         * Cumulative ns of schedule CPU time fo dead threads in the

         * group, not including a zombie group leader, (This only differs

         * from jiffies_to_ns(utime + stime) if sched_clock uses something

         * other than jiffies.)

         */

        unsigned long long sum_sched_runtime;

 

        /*

         * We don't bother to synchronize most readers of this at all,

         * because there is no reader checking a limit that actually needs

         * to get both rlim_cur and rlim_max atomically, and either one

         * alone is a single word that can safely be read normally.

         * getrlimit/setrlimit use task_lock(current->group_leader) to

         * protect this instead of the siglock, because they really

         * have no need to disable irqs.

         */

        struct rlimit rlim[RLIM_NLIMITS];

 

#ifdef CONFIG_BSD_PROCESS_ACCT

        struct pacct_struct pacct;      /* per-process accounting information */

#endif

#ifdef CONFIG_TASKSTATS

        struct taskstats *stats;

#endif

#ifdef CONFIG_AUDIT

        unsigned audit_tty;

        struct tty_audit_buf *tty_audit_buf;

#endif

 

        int oom_adj;            /* OOM kill score adjustment (bit shift) */

        int oom_score_adj;      /* OOM kill score adjustment */

};

 

/* Context switch must be unlocked if interrupts are to be enabled */

#ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW

# define __ARCH_WANT_UNLOCKED_CTXSW

#endif

 

/*

 * Bits in flags field of signal_struct.

 */

#define SIGNAL_STOP_STOPPED     0x00000001 /* job control stop in effect */

#define SIGNAL_STOP_DEQUEUED    0x00000002 /* stop signal dequeued */

#define SIGNAL_STOP_CONTINUED   0x00000004 /* SIGCONT since WCONTINUED reap */

#define SIGNAL_GROUP_EXIT       0x00000008 /* group exit in progress */

/*

 * Pending notifications to parent.

 */

#define SIGNAL_CLD_STOPPED      0x00000010

#define SIGNAL_CLD_CONTINUED    0x00000020

#define SIGNAL_CLD_MASK         (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)

 

#define SIGNAL_UNKILLABLE       0x00000040 /* for init: ignore fatal signals */

 

/* If true, all threads except ->group_exit_task have pending SIGKILL */

static inline int signal_group_exit(const struct signal_struct *sig)

{

        return  (sig->flags & SIGNAL_GROUP_EXIT) ||

                (sig->group_exit_task != NULL);

}

 

/*

 * Some day this will be a full-fledged user tracking system..

 */

struct user_struct {

        atomic_t __count;       /* reference count */

        atomic_t processes;     /* How many processes does this user have? */

        atomic_t files;         /* How many open files does this user have? */

        atomic_t sigpending;    /* How many pending signals does this user have? */

#ifdef CONFIG_INOTIFY_USER

        atomic_t inotify_watches; /* How many inotify watches does this user have? */

        atomic_t inotify_devs;  /* How many inotify devs does this user have opened? */

#endif

#ifdef CONFIG_EPOLL

        atomic_t epoll_watches; /* The number of file descriptors currently watched */

#endif

#ifdef CONFIG_POSIX_MQUEUE

        /* protected by mq_lock */

        unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */

#endif

        unsigned long locked_shm; /* How many pages of mlocked shm ? */

 

#ifdef CONFIG_KEYS

        struct key *uid_keyring;        /* UID specific keyring */

        struct key *session_keyring;    /* UID's default session keyring */

#endif

 

        /* Hash table maintenance information */

        struct hlist_node uidhash_node;

        uid_t uid;

        struct user_namespace *user_ns;

 

#ifdef CONFIG_PERF_EVENTS

        atomic_long_t locked_vm;

#endif

};

 

extern int uids_sysfs_init(void);

 

extern struct user_struct *find_user(uid_t);

 

extern struct user_struct root_user;

#define INIT_USER (&root_user)

 

 

struct backing_dev_info;

struct reclaim_state;

 

#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)

struct sched_info {

        /* cumulative counters */

        unsigned long pcount;         /* # of times run on this cpu */

        unsigned long long run_delay; /* time spent waiting on a runqueue */

 

        /* timestamps */

        unsigned long long last_arrival,/* when we last ran on a cpu */

                           last_queued; /* when we were last queued to run */

#ifdef CONFIG_SCHEDSTATS

        /* BKL stats */

        unsigned int bkl_count;

#endif

};

#endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */

 

#ifdef CONFIG_TASK_DELAY_ACCT

struct task_delay_info {

        spinlock_t      lock;

        unsigned int    flags;  /* Private per-task flags */

 

        /* For each stat XXX, add following, aligned appropriately

         *

         * struct timespec XXX_start, XXX_end;

         * u64 XXX_delay;

         * u32 XXX_count;

         *

         * Atomicity of updates to XXX_delay, XXX_count protected by

         * single lock above (split into XXX_lock if contention is an issue).

         */

 

        /*

         * XXX_count is incremented on every XXX operation, the delay

         * associated with the operation is added to XXX_delay.

         * XXX_delay contains the accumulated delay time in nanoseconds.

         */

        struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */

        u64 blkio_delay;        /* wait for sync block io completion */

        u64 swapin_delay;       /* wait for swapin block io completion */

        u32 blkio_count;        /* total count of the number of sync block */

                                /* io operations performed */

        u32 swapin_count;       /* total count of the number of swapin block */

                                /* io operations performed */

 

        struct timespec freepages_start, freepages_end;

        u64 freepages_delay;    /* wait for memory reclaim */

        u32 freepages_count;    /* total count of memory reclaim */

};

#endif  /* CONFIG_TASK_DELAY_ACCT */

 

static inline int sched_info_on(void)

{

#ifdef CONFIG_SCHEDSTATS

        return 1;

#elif defined(CONFIG_TASK_DELAY_ACCT)

        extern int delayacct_on;

        return delayacct_on;

#else

        return 0;

#endif

}

 

enum cpu_idle_type {

        CPU_IDLE,

        CPU_NOT_IDLE,

        CPU_NEWLY_IDLE,

        CPU_MAX_IDLE_TYPES

};

 

/*

 * sched-domains (multiprocessor balancing) declarations:

 */

 

/*

 * Increase resolution of nice-level calculations:

 */

#define SCHED_LOAD_SHIFT        10

#define SCHED_LOAD_SCALE        (1L << SCHED_LOAD_SHIFT)

 

#define SCHED_LOAD_SCALE_FUZZ   SCHED_LOAD_SCALE

 

#ifdef CONFIG_SMP

#define SD_LOAD_BALANCE         0x0001  /* Do load balancing on this domain. */

#define SD_BALANCE_NEWIDLE      0x0002  /* Balance when about to become idle */

#define SD_BALANCE_EXEC         0x0004  /* Balance on exec */

#define SD_BALANCE_FORK         0x0008  /* Balance on fork, clone */

#define SD_BALANCE_WAKE         0x0010  /* Balance on wakeup */

#define SD_WAKE_AFFINE          0x0020  /* Wake task to waking CPU */

#define SD_PREFER_LOCAL         0x0040  /* Prefer to keep tasks local to this domain */

#define SD_SHARE_CPUPOWER       0x0080  /* Domain members share cpu power */

#define SD_POWERSAVINGS_BALANCE 0x0100  /* Balance for power savings */

#define SD_SHARE_PKG_RESOURCES  0x0200  /* Domain members share cpu pkg resources */

#define SD_SERIALIZE            0x0400  /* Only a single load balancing instance */

#define SD_ASYM_PACKING         0x0800  /* Place busy groups earlier in the domain */

#define SD_PREFER_SIBLING       0x1000  /* Prefer to place tasks in a sibling domain */

 

enum powersavings_balance_level {

        POWERSAVINGS_BALANCE_NONE = 0,  /* No power saving load balance */

        POWERSAVINGS_BALANCE_BASIC,     /* Fill one thread/core/package

                                         * first for long running threads

                                         */

        POWERSAVINGS_BALANCE_WAKEUP,    /* Also bias task wakeups to semi-idle

                                         * cpu package for power savings

                                         */

        MAX_POWERSAVINGS_BALANCE_LEVELS

};

 

extern int sched_mc_power_savings, sched_smt_power_savings;

 

static inline int sd_balance_for_mc_power(void)

{

        if (sched_smt_power_savings)

                return SD_POWERSAVINGS_BALANCE;

 

        if (!sched_mc_power_savings)

                return SD_PREFER_SIBLING;

 

        return 0;

}

 

static inline int sd_balance_for_package_power(void)

{

        if (sched_mc_power_savings | sched_smt_power_savings)

                return SD_POWERSAVINGS_BALANCE;

 

        return SD_PREFER_SIBLING;

}

 

extern int __weak arch_sd_sibiling_asym_packing(void);

 

/*

 * Optimise SD flags for power savings:

 * SD_BALANCE_NEWIDLE helps agressive task consolidation and power savings.

 * Keep default SD flags if sched_{smt,mc}_power_saving=0

 */

 

static inline int sd_power_saving_flags(void)

{

        if (sched_mc_power_savings | sched_smt_power_savings)

                return SD_BALANCE_NEWIDLE;

 

        return 0;

}

 

struct sched_group {

        struct sched_group *next;       /* Must be a circular list */

 

        /*

         * CPU power of this group, SCHED_LOAD_SCALE being max power for a

         * single CPU.

         */

        unsigned int cpu_power, cpu_power_orig;

 

        /*

         * The CPUs this group covers.

         *

         * NOTE: this field is variable length. (Allocated dynamically

         * by attaching extra space to the end of the structure,

         * depending on how many CPUs the kernel has booted up with)

         *

         * It is also be embedded into static data structures at build

         * time. (See 'struct static_sched_group' in kernel/sched.c)

         */

        unsigned long cpumask[0];

};

 

static inline struct cpumask *sched_group_cpus(struct sched_group *sg)

{

        return to_cpumask(sg->cpumask);

}

 

enum sched_domain_level {

        SD_LV_NONE = 0,

        SD_LV_SIBLING,

        SD_LV_MC,

        SD_LV_CPU,

        SD_LV_NODE,

        SD_LV_ALLNODES,

        SD_LV_MAX

};

 

struct sched_domain_attr {

        int relax_domain_level;

};

 

#define SD_ATTR_INIT    (struct sched_domain_attr) {    \

        .relax_domain_level = -1,                       \

}

 

struct sched_domain {

        /* These fields must be setup */

        struct sched_domain *parent;    /* top domain must be null terminated */

        struct sched_domain *child;     /* bottom domain must be null terminated */

        struct sched_group *groups;     /* the balancing groups of the domain */

        unsigned long min_interval;     /* Minimum balance interval ms */

        unsigned long max_interval;     /* Maximum balance interval ms */

        unsigned int busy_factor;       /* less balancing by factor if busy */

        unsigned int imbalance_pct;     /* No balance until over watermark */

        unsigned int cache_nice_tries;  /* Leave cache hot tasks for # tries */

        unsigned int busy_idx;

        unsigned int idle_idx;

        unsigned int newidle_idx;

        unsigned int wake_idx;

        unsigned int forkexec_idx;

        unsigned int smt_gain;

        int flags;                      /* See SD_* */

        enum sched_domain_level level;

 

        /* Runtime fields. */

        unsigned long last_balance;     /* init to jiffies. units in jiffies */

        unsigned int balance_interval;  /* initialise to 1. units in ms. */

        unsigned int nr_balance_failed; /* initialise to 0 */

 

        u64 last_update;

 

#ifdef CONFIG_SCHEDSTATS

        /* load_balance() stats */

        unsigned int lb_count[CPU_MAX_IDLE_TYPES];

        unsigned int lb_failed[CPU_MAX_IDLE_TYPES];

        unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];

        unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];

        unsigned int lb_gained[CPU_MAX_IDLE_TYPES];

        unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];

        unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];

        unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];

 

        /* Active load balancing */

        unsigned int alb_count;

        unsigned int alb_failed;

        unsigned int alb_pushed;

 

        /* SD_BALANCE_EXEC stats */

        unsigned int sbe_count;

        unsigned int sbe_balanced;

        unsigned int sbe_pushed;

 

        /* SD_BALANCE_FORK stats */

        unsigned int sbf_count;

        unsigned int sbf_balanced;

        unsigned int sbf_pushed;

 

        /* try_to_wake_up() stats */

        unsigned int ttwu_wake_remote;

        unsigned int ttwu_move_affine;

        unsigned int ttwu_move_balance;

#endif

#ifdef CONFIG_SCHED_DEBUG

        char *name;

#endif

 

        unsigned int span_weight;

        /*

         * Span of all CPUs in this domain.

         *

         * NOTE: this field is variable length. (Allocated dynamically

         * by attaching extra space to the end of the structure,

         * depending on how many CPUs the kernel has booted up with)

         *

         * It is also be embedded into static data structures at build

         * time. (See 'struct static_sched_domain' in kernel/sched.c)

         */

        unsigned long span[0];

};

 

static inline struct cpumask *sched_domain_span(struct sched_domain *sd)

{

        return to_cpumask(sd->span);

}

 

extern void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],

                                    struct sched_domain_attr *dattr_new);

 

/* Allocate an array of sched domains, for partition_sched_domains(). */

cpumask_var_t *alloc_sched_domains(unsigned int ndoms);

void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms);

 

/* Test a flag in parent sched domain */

static inline int test_sd_parent(struct sched_domain *sd, int flag)

{

        if (sd->parent && (sd->parent->flags & flag))

                return 1;

 

        return 0;

}

 

unsigned long default_scale_freq_power(struct sched_domain *sd, int cpu);

unsigned long default_scale_smt_power(struct sched_domain *sd, int cpu);

 

#else /* CONFIG_SMP */

 

struct sched_domain_attr;

 

static inline void

partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],

                        struct sched_domain_attr *dattr_new)

{

}

#endif  /* !CONFIG_SMP */

 

 

struct io_context;                      /* See blkdev.h */

 

 

#ifdef ARCH_HAS_PREFETCH_SWITCH_STACK

extern void prefetch_stack(struct task_struct *t);

#else

static inline void prefetch_stack(struct task_struct *t) { }

#endif

 

struct audit_context;           /* See audit.c */

struct mempolicy;

struct pipe_inode_info;

struct uts_namespace;

 

struct rq;

struct sched_domain;

 

/*

 * wake flags

 */

#define WF_SYNC         0x01            /* waker goes to sleep after wakup */

#define WF_FORK         0x02            /* child wakeup after fork */

 

#define ENQUEUE_WAKEUP          1

#define ENQUEUE_WAKING          2

#define ENQUEUE_HEAD            4

 

#define DEQUEUE_SLEEP           1

 

struct sched_class {

        const struct sched_class *next;

 

        void (*enqueue_task) (struct rq *rq, struct task_struct *p, int flags);

        void (*dequeue_task) (struct rq *rq, struct task_struct *p, int flags);

        void (*yield_task) (struct rq *rq);

 

        void (*check_preempt_curr) (struct rq *rq, struct task_struct *p, int flags);

 

        struct task_struct * (*pick_next_task) (struct rq *rq);

        void (*put_prev_task) (struct rq *rq, struct task_struct *p);

 

#ifdef CONFIG_SMP

        int  (*select_task_rq)(struct rq *rq, struct task_struct *p,

                               int sd_flag, int flags);

 

        void (*pre_schedule) (struct rq *this_rq, struct task_struct *task);

        void (*post_schedule) (struct rq *this_rq);

        void (*task_waking) (struct rq *this_rq, struct task_struct *task);

        void (*task_woken) (struct rq *this_rq, struct task_struct *task);

 

        void (*set_cpus_allowed)(struct task_struct *p,

                                 const struct cpumask *newmask);

 

        void (*rq_online)(struct rq *rq);

        void (*rq_offline)(struct rq *rq);

#endif

 

        void (*set_curr_task) (struct rq *rq);

        void (*task_tick) (struct rq *rq, struct task_struct *p, int queued);

        void (*task_fork) (struct task_struct *p);

 

        void (*switched_from) (struct rq *this_rq, struct task_struct *task,

                               int running);

        void (*switched_to) (struct rq *this_rq, struct task_struct *task,

                             int running);

        void (*prio_changed) (struct rq *this_rq, struct task_struct *task,

                             int oldprio, int running);

 

        unsigned int (*get_rr_interval) (struct rq *rq,

                                         struct task_struct *task);

 

#ifdef CONFIG_FAIR_GROUP_SCHED

        void (*moved_group) (struct task_struct *p, int on_rq);

#endif

};

 

struct load_weight {

        unsigned long weight, inv_weight;

};

 

#ifdef CONFIG_SCHEDSTATS

struct sched_statistics {

        u64                     wait_start;

        u64                     wait_max;

        u64                     wait_count;

        u64                     wait_sum;

        u64                     iowait_count;

        u64                     iowait_sum;

 

        u64                     sleep_start;

        u64                     sleep_max;

        s64                     sum_sleep_runtime;

 

        u64                     block_start;

        u64                     block_max;

        u64                     exec_max;

        u64                     slice_max;

 

        u64                     nr_migrations_cold;

        u64                     nr_failed_migrations_affine;

        u64                     nr_failed_migrations_running;

        u64                     nr_failed_migrations_hot;

        u64                     nr_forced_migrations;

 

        u64                     nr_wakeups;

        u64                     nr_wakeups_sync;

        u64                     nr_wakeups_migrate;

        u64                     nr_wakeups_local;

        u64                     nr_wakeups_remote;

        u64                     nr_wakeups_affine;

        u64                     nr_wakeups_affine_attempts;

        u64                     nr_wakeups_passive;

        u64                     nr_wakeups_idle;

};

#endif

 

struct sched_entity {

        struct load_weight      load;           /* for load-balancing */

        struct rb_node          run_node;

        struct list_head        group_node;

        unsigned int            on_rq;

 

        u64                     exec_start;

        u64                     sum_exec_runtime;

        u64                     vruntime;

        u64                     prev_sum_exec_runtime;

 

        u64                     nr_migrations;

 

#ifdef CONFIG_SCHEDSTATS

        struct sched_statistics statistics;

#endif

 

#ifdef CONFIG_FAIR_GROUP_SCHED

        struct sched_entity     *parent;

        /* rq on which this entity is (to be) queued: */

        struct cfs_rq           *cfs_rq;

        /* rq "owned" by this entity/group: */

        struct cfs_rq           *my_q;

#endif

};

 

struct sched_rt_entity {

        struct list_head run_list;

        unsigned long timeout;

        unsigned int time_slice;

        int nr_cpus_allowed;

 

        struct sched_rt_entity *back;

#ifdef CONFIG_RT_GROUP_SCHED

        struct sched_rt_entity  *parent;

        /* rq on which this entity is (to be) queued: */

        struct rt_rq            *rt_rq;

        /* rq "owned" by this entity/group: */

        struct rt_rq            *my_q;

#endif

};

 

struct rcu_node;

 

struct task_struct {

        volatile long state;    /* -1 unrunnable, 0 runnable, >0 stopped */

        void *stack;

        atomic_t usage;

        unsigned int flags;     /* per process flags, defined below */

        unsigned int ptrace;

 

        int lock_depth;         /* BKL lock depth */

 

#ifdef CONFIG_SMP

#ifdef __ARCH_WANT_UNLOCKED_CTXSW

        int oncpu;

#endif

#endif

 

        int prio, static_prio, normal_prio;

        unsigned int rt_priority;

        const struct sched_class *sched_class;

        struct sched_entity se;

        struct sched_rt_entity rt;

 

#ifdef CONFIG_PREEMPT_NOTIFIERS

        /* list of struct preempt_notifier: */

        struct hlist_head preempt_notifiers;

#endif

 

        /*

         * fpu_counter contains the number of consecutive context switches

         * that the FPU is used. If this is over a threshold, the lazy fpu

         * saving becomes unlazy to save the trap. This is an unsigned char

         * so that after 256 times the counter wraps and the behavior turns

         * lazy again; this to deal with bursty apps that only use FPU for

         * a short time

         */

        unsigned char fpu_counter;

#ifdef CONFIG_BLK_DEV_IO_TRACE

        unsigned int btrace_seq;

#endif

 

        unsigned int policy;

        cpumask_t cpus_allowed;

 

#ifdef CONFIG_TREE_PREEMPT_RCU

        int rcu_read_lock_nesting;

        char rcu_read_unlock_special;

        struct rcu_node *rcu_blocked_node;

        struct list_head rcu_node_entry;

#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */

 

#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)

        struct sched_info sched_info;

#endif

 

        struct list_head tasks;

        struct plist_node pushable_tasks;

 

        struct mm_struct *mm, *active_mm;

#if defined(SPLIT_RSS_COUNTING)

        struct task_rss_stat    rss_stat;

#endif

/* task state */

        int exit_state;

        int exit_code, exit_signal;

        int pdeath_signal;  /*  The signal sent when the parent dies  */

        /* ??? */

        unsigned int personality;

        unsigned did_exec:1;

        unsigned in_execve:1;   /* Tell the LSMs that the process is doing an

                                 * execve */

        unsigned in_iowait:1;

 

 

        /* Revert to default priority/policy when forking */

        unsigned sched_reset_on_fork:1;

 

        pid_t pid;

        pid_t tgid;

 

#ifdef CONFIG_CC_STACKPROTECTOR

        /* Canary value for the -fstack-protector gcc feature */

        unsigned long stack_canary;

#endif

 

        /*

         * pointers to (original) parent process, youngest child, younger sibling,

         * older sibling, respectively.  (p->father can be replaced with

         * p->real_parent->pid)

         */

        struct task_struct *real_parent; /* real parent process */

        struct task_struct *parent; /* recipient of SIGCHLD, wait4() reports */

        /*

         * children/sibling forms the list of my natural children

         */

        struct list_head children;      /* list of my children */

        struct list_head sibling;       /* linkage in my parent's children list */

        struct task_struct *group_leader;       /* threadgroup leader */

 

        /*

         * ptraced is the list of tasks this task is using ptrace on.

         * This includes both natural children and PTRACE_ATTACH targets.

         * p->ptrace_entry is p's link on the p->parent->ptraced list.

         */

        struct list_head ptraced;

        struct list_head ptrace_entry;

 

        /* PID/PID hash table linkage. */

        struct pid_link pids[PIDTYPE_MAX];

        struct list_head thread_group;

 

        struct completion *vfork_done;          /* for vfork() */

        int __user *set_child_tid;              /* CLONE_CHILD_SETTID */

        int __user *clear_child_tid;            /* CLONE_CHILD_CLEARTID */

 

        cputime_t utime, stime, utimescaled, stimescaled;

        cputime_t gtime;

#ifndef CONFIG_VIRT_CPU_ACCOUNTING

        cputime_t prev_utime, prev_stime;

#endif

        unsigned long nvcsw, nivcsw; /* context switch counts */

        struct timespec start_time;             /* monotonic time */

        struct timespec real_start_time;        /* boot based time */

/* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */

        unsigned long min_flt, maj_flt;

 

        struct task_cputime cputime_expires;

        struct list_head cpu_timers[3];

 

/* process credentials */

        const struct cred *real_cred;   /* objective and real subjective task

                                         * credentials (COW) */

        const struct cred *cred;        /* effective (overridable) subjective task

                                         * credentials (COW) */

        struct mutex cred_guard_mutex;  /* guard against foreign influences on

                                         * credential calculations

                                         * (notably. ptrace) */

        struct cred *replacement_session_keyring; /* for KEYCTL_SESSION_TO_PARENT */

 

        char comm[TASK_COMM_LEN]; /* executable name excluding path

                                     - access with [gs]et_task_comm (which lock

                                       it with task_lock())

                                     - initialized normally by setup_new_exec */

/* file system info */

        int link_count, total_link_count;

#ifdef CONFIG_SYSVIPC

/* ipc stuff */

        struct sysv_sem sysvsem;

#endif

#ifdef CONFIG_DETECT_HUNG_TASK

/* hung task detection */

        unsigned long last_switch_count;

#endif

/* CPU-specific state of this task */

        struct thread_struct thread;

/* filesystem information */

        struct fs_struct *fs;

/* open file information */

        struct files_struct *files;

/* namespaces */

        struct nsproxy *nsproxy;

/* signal handlers */

        struct signal_struct *signal;

        struct sighand_struct *sighand;

 

        sigset_t blocked, real_blocked;

        sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */

        struct sigpending pending;

 

        unsigned long sas_ss_sp;

        size_t sas_ss_size;

        int (*notifier)(void *priv);

        void *notifier_data;

        sigset_t *notifier_mask;

        struct audit_context *audit_context;

#ifdef CONFIG_AUDITSYSCALL

        uid_t loginuid;

        unsigned int sessionid;

#endif

        seccomp_t seccomp;

 

/* Thread group tracking */

        u32 parent_exec_id;

        u32 self_exec_id;

/* Protection of (de-)allocation: mm, files, fs, tty, keyrings, mems_allowed,

 * mempolicy */

        spinlock_t alloc_lock;

 

#ifdef CONFIG_GENERIC_HARDIRQS

        /* IRQ handler threads */

        struct irqaction *irqaction;

#endif

 

        /* Protection of the PI data structures: */

        raw_spinlock_t pi_lock;

 

#ifdef CONFIG_RT_MUTEXES

        /* PI waiters blocked on a rt_mutex held by this task */

        struct plist_head pi_waiters;

        /* Deadlock detection and priority inheritance handling */

        struct rt_mutex_waiter *pi_blocked_on;

#endif

 

#ifdef CONFIG_DEBUG_MUTEXES

        /* mutex deadlock detection */

        struct mutex_waiter *blocked_on;

#endif

#ifdef CONFIG_TRACE_IRQFLAGS

        unsigned int irq_events;

        unsigned long hardirq_enable_ip;

        unsigned long hardirq_disable_ip;

        unsigned int hardirq_enable_event;

        unsigned int hardirq_disable_event;

        int hardirqs_enabled;

        int hardirq_context;

        unsigned long softirq_disable_ip;

        unsigned long softirq_enable_ip;

        unsigned int softirq_disable_event;

        unsigned int softirq_enable_event;

        int softirqs_enabled;

        int softirq_context;

#endif

#ifdef CONFIG_LOCKDEP

# define MAX_LOCK_DEPTH 48UL

        u64 curr_chain_key;

        int lockdep_depth;

        unsigned int lockdep_recursion;

        struct held_lock held_locks[MAX_LOCK_DEPTH];

        gfp_t lockdep_reclaim_gfp;

#endif

 

/* journalling filesystem info */

        void *journal_info;

 

/* stacked block device info */

        struct bio_list *bio_list;

 

/* VM state */

        struct reclaim_state *reclaim_state;

 

        struct backing_dev_info *backing_dev_info;

 

        struct io_context *io_context;

 

        unsigned long ptrace_message;

        siginfo_t *last_siginfo; /* For ptrace use.  */

        struct task_io_accounting ioac;

#if defined(CONFIG_TASK_XACCT)

        u64 acct_rss_mem1;      /* accumulated rss usage */

        u64 acct_vm_mem1;       /* accumulated virtual memory usage */

        cputime_t acct_timexpd; /* stime + utime since last update */

#endif

#ifdef CONFIG_CPUSETS

        nodemask_t mems_allowed;        /* Protected by alloc_lock */

        int mems_allowed_change_disable;

        int cpuset_mem_spread_rotor;

        int cpuset_slab_spread_rotor;

#endif

#ifdef CONFIG_CGROUPS

        /* Control Group info protected by css_set_lock */

        struct css_set *cgroups;

        /* cg_list protected by css_set_lock and tsk->alloc_lock */

        struct list_head cg_list;

#endif

#ifdef CONFIG_FUTEX

        struct robust_list_head __user *robust_list;

#ifdef CONFIG_COMPAT

        struct compat_robust_list_head __user *compat_robust_list;

#endif

        struct list_head pi_state_list;

        struct futex_pi_state *pi_state_cache;

#endif

#ifdef CONFIG_PERF_EVENTS

        struct perf_event_context *perf_event_ctxp;

        struct mutex perf_event_mutex;

        struct list_head perf_event_list;

#endif

#ifdef CONFIG_NUMA

        struct mempolicy *mempolicy;    /* Protected by alloc_lock */

        short il_next;

#endif

        atomic_t fs_excl;       /* holding fs exclusive resources */

        struct rcu_head rcu;

 

        /*

         * cache last used pipe for splice

         */

        struct pipe_inode_info *splice_pipe;

#ifdef  CONFIG_TASK_DELAY_ACCT

        struct task_delay_info *delays;

#endif

#ifdef CONFIG_FAULT_INJECTION

        int make_it_fail;

#endif

        struct prop_local_single dirties;

#ifdef CONFIG_LATENCYTOP

        int latency_record_count;

        struct latency_record latency_record[LT_SAVECOUNT];

#endif

        /*

         * time slack values; these are used to round up poll() and

         * select() etc timeout values. These are in nanoseconds.

         */

        unsigned long timer_slack_ns;

        unsigned long default_timer_slack_ns;

 

        struct list_head        *scm_work_list;

#ifdef CONFIG_FUNCTION_GRAPH_TRACER

        /* Index of current stored address in ret_stack */

        int curr_ret_stack;

        /* Stack of return addresses for return function tracing */

        struct ftrace_ret_stack *ret_stack;

        /* time stamp for last schedule */

        unsigned long long ftrace_timestamp;

        /*

         * Number of functions that haven't been traced

         * because of depth overrun.

         */

        atomic_t trace_overrun;

        /* Pause for the tracing */

        atomic_t tracing_graph_pause;

#endif

#ifdef CONFIG_TRACING

        /* state flags for use by tracers */

        unsigned long trace;

        /* bitmask of trace recursion */

        unsigned long trace_recursion;

#endif /* CONFIG_TRACING */

#ifdef CONFIG_CGROUP_MEM_RES_CTLR /* memcg uses this to do batch job */

        struct memcg_batch_info {

                int do_batch;   /* incremented when batch uncharge started */

                struct mem_cgroup *memcg; /* target memcg of uncharge */

                unsigned long bytes;            /* uncharged usage */

                unsigned long memsw_bytes; /* uncharged mem+swap usage */

        } memcg_batch;

#endif

};

 

/* Future-safe accessor for struct task_struct's cpus_allowed. */

#define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed)

 

/*

 * Priority of a process goes from 0..MAX_PRIO-1, valid RT

 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH

 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority

 * values are inverted: lower p->prio value means higher priority.

 *

 * The MAX_USER_RT_PRIO value allows the actual maximum

 * RT priority to be separate from the value exported to

 * user-space.  This allows kernel threads to set their

 * priority to a value higher than any user task. Note:

 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.

 */

 

#define MAX_USER_RT_PRIO        100

#define MAX_RT_PRIO             MAX_USER_RT_PRIO

 

#define MAX_PRIO                (MAX_RT_PRIO + 40)

#define DEFAULT_PRIO            (MAX_RT_PRIO + 20)

 

static inline int rt_prio(int prio)

{

        if (unlikely(prio < MAX_RT_PRIO))

                return 1;

        return 0;

}

 

static inline int rt_task(struct task_struct *p)

{

        return rt_prio(p->prio);

}

 

static inline struct pid *task_pid(struct task_struct *task)

{

        return task->pids[PIDTYPE_PID].pid;

}

 

static inline struct pid *task_tgid(struct task_struct *task)

{

        return task->group_leader->pids[PIDTYPE_PID].pid;

}

 

/*

 * Without tasklist or rcu lock it is not safe to dereference

 * the result of task_pgrp/task_session even if task == current,

 * we can race with another thread doing sys_setsid/sys_setpgid.

 */

static inline struct pid *task_pgrp(struct task_struct *task)

{

        return task->group_leader->pids[PIDTYPE_PGID].pid;

}

 

static inline struct pid *task_session(struct task_struct *task)

{

        return task->group_leader->pids[PIDTYPE_SID].pid;

}

 

struct pid_namespace;

 

/*

 * the helpers to get the task's different pids as they are seen

 * from various namespaces

 *

 * task_xid_nr()     : global id, i.e. the id seen from the init namespace;

 * task_xid_vnr()    : virtual id, i.e. the id seen from the pid namespace of

 *                     current.

 * task_xid_nr_ns()  : id seen from the ns specified;

 *

 * set_task_vxid()   : assigns a virtual id to a task;

 *

 * see also pid_nr() etc in include/linux/pid.h

 */

pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type,

                        struct pid_namespace *ns);

 

static inline pid_t task_pid_nr(struct task_struct *tsk)

{

        return tsk->pid;

}

 

static inline pid_t task_pid_nr_ns(struct task_struct *tsk,

                                        struct pid_namespace *ns)

{

        return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns);

}

 

static inline pid_t task_pid_vnr(struct task_struct *tsk)

{

        return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL);

}

 

 

static inline pid_t task_tgid_nr(struct task_struct *tsk)

{

        return tsk->tgid;

}

 

pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);

 

static inline pid_t task_tgid_vnr(struct task_struct *tsk)

{

        return pid_vnr(task_tgid(tsk));

}

 

 

static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk,

                                        struct pid_namespace *ns)

{

        return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns);

}

 

static inline pid_t task_pgrp_vnr(struct task_struct *tsk)

{

        return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL);

}

 

 

static inline pid_t task_session_nr_ns(struct task_struct *tsk,

                                        struct pid_namespace *ns)

{

        return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns);

}

 

static inline pid_t task_session_vnr(struct task_struct *tsk)

{

        return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL);

}

 

/* obsolete, do not use */

static inline pid_t task_pgrp_nr(struct task_struct *tsk)

{

        return task_pgrp_nr_ns(tsk, &init_pid_ns);

}

 

/**

 * pid_alive - check that a task structure is not stale

 * @p: Task structure to be checked.

 *

 * Test if a process is not yet dead (at most zombie state)

 * If pid_alive fails, then pointers within the task structure

 * can be stale and must not be dereferenced.

 */

static inline int pid_alive(struct task_struct *p)

{

        return p->pids[PIDTYPE_PID].pid != NULL;

}

 

/**

 * is_global_init - check if a task structure is init

 * @tsk: Task structure to be checked.

 *

 * Check if a task structure is the first user space task the kernel created.

 */

static inline int is_global_init(struct task_struct *tsk)

{

        return tsk->pid == 1;

}

 

/*

 * is_container_init:

 * check whether in the task is init in its own pid namespace.

 */

extern int is_container_init(struct task_struct *tsk);

 

extern struct pid *cad_pid;

 

extern void free_task(struct task_struct *tsk);

#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)

 

extern void __put_task_struct(struct task_struct *t);

 

static inline void put_task_struct(struct task_struct *t)

{

        if (atomic_dec_and_test(&t->usage))

                __put_task_struct(t);

}

 

extern void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st);

extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st);

 

/*

 * Per process flags

 */

#define PF_ALIGNWARN    0x00000001      /* Print alignment warning msgs */

                                        /* Not implemented yet, only for 486*/

#define PF_STARTING     0x00000002      /* being created */

#define PF_EXITING      0x00000004      /* getting shut down */

#define PF_EXITPIDONE   0x00000008      /* pi exit done on shut down */

#define PF_VCPU         0x00000010      /* I'm a virtual CPU */

#define PF_WQ_WORKER    0x00000020      /* I'm a workqueue worker */

#define PF_FORKNOEXEC   0x00000040      /* forked but didn't exec */

#define PF_MCE_PROCESS  0x00000080      /* process policy on mce errors */

#define PF_SUPERPRIV    0x00000100      /* used super-user privileges */

#define PF_DUMPCORE     0x00000200      /* dumped core */

#define PF_SIGNALED     0x00000400      /* killed by a signal */

#define PF_MEMALLOC     0x00000800      /* Allocating memory */

#define PF_FLUSHER      0x00001000      /* responsible for disk writeback */

#define PF_USED_MATH    0x00002000      /* if unset the fpu must be initialized before use */

#define PF_FREEZING     0x00004000      /* freeze in progress. do not account to load */

#define PF_NOFREEZE     0x00008000      /* this thread should not be frozen */

#define PF_FROZEN       0x00010000      /* frozen for system suspend */

#define PF_FSTRANS      0x00020000      /* inside a filesystem transaction */

#define PF_KSWAPD       0x00040000      /* I am kswapd */

#define PF_OOM_ORIGIN   0x00080000      /* Allocating much memory to others */

#define PF_LESS_THROTTLE 0x00100000     /* Throttle me less: I clean memory */

#define PF_KTHREAD      0x00200000      /* I am a kernel thread */

#define PF_RANDOMIZE    0x00400000      /* randomize virtual address space */

#define PF_SWAPWRITE    0x00800000      /* Allowed to write to swap */

#define PF_SPREAD_PAGE  0x01000000      /* Spread page cache over cpuset */

#define PF_SPREAD_SLAB  0x02000000      /* Spread some slab caches over cpuset */

#define PF_THREAD_BOUND 0x04000000      /* Thread bound to specific cpu */

#define PF_MCE_EARLY    0x08000000      /* Early kill for mce process policy */

#define PF_MEMPOLICY    0x10000000      /* Non-default NUMA mempolicy */

#define PF_MUTEX_TESTER 0x20000000      /* Thread belongs to the rt mutex tester */

#define PF_FREEZER_SKIP 0x40000000      /* Freezer should not count it as freezeable */

#define PF_FREEZER_NOSIG 0x80000000     /* Freezer won't send signals to it */

 

/*

 * Only the _current_ task can read/write to tsk->flags, but other

 * tasks can access tsk->flags in readonly mode for example

 * with tsk_used_math (like during threaded core dumping).

 * There is however an exception to this rule during ptrace

 * or during fork: the ptracer task is allowed to write to the

 * child->flags of its traced child (same goes for fork, the parent

 * can write to the child->flags), because we're guaranteed the

 * child is not running and in turn not changing child->flags

 * at the same time the parent does it.

 */

#define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)

#define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)

#define clear_used_math() clear_stopped_child_used_math(current)

#define set_used_math() set_stopped_child_used_math(current)

#define conditional_stopped_child_used_math(condition, child) \

        do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)

#define conditional_used_math(condition) \

        conditional_stopped_child_used_math(condition, current)

#define copy_to_stopped_child_used_math(child) \

        do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)

/* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */

#define tsk_used_math(p) ((p)->flags & PF_USED_MATH)

#define used_math() tsk_used_math(current)

 

#ifdef CONFIG_TREE_PREEMPT_RCU

 

#define RCU_READ_UNLOCK_BLOCKED (1 << 0) /* blocked while in RCU read-side. */

#define RCU_READ_UNLOCK_NEED_QS (1 << 1) /* RCU core needs CPU response. */

 

static inline void rcu_copy_process(struct task_struct *p)

{

        p->rcu_read_lock_nesting = 0;

        p->rcu_read_unlock_special = 0;

        p->rcu_blocked_node = NULL;

        INIT_LIST_HEAD(&p->rcu_node_entry);

}

 

#else

 

static inline void rcu_copy_process(struct task_struct *p)

{

}

 

#endif

 

#ifdef CONFIG_SMP

extern int set_cpus_allowed_ptr(struct task_struct *p,

                                const struct cpumask *new_mask);

#else

static inline int set_cpus_allowed_ptr(struct task_struct *p,

                                       const struct cpumask *new_mask)

{

        if (!cpumask_test_cpu(0, new_mask))

                return -EINVAL;

        return 0;

}

#endif

 

#ifndef CONFIG_CPUMASK_OFFSTACK

static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)

{

        return set_cpus_allowed_ptr(p, &new_mask);

}

#endif

 

/*

 * Do not use outside of architecture code which knows its limitations.

 *

 * sched_clock() has no promise of monotonicity or bounded drift between

 * CPUs, use (which you should not) requires disabling IRQs.

 *

 * Please use one of the three interfaces below.

 */

extern unsigned long long notrace sched_clock(void);

/*

 * See the comment in kernel/sched_clock.c

 */

extern u64 cpu_clock(int cpu);

extern u64 local_clock(void);

extern u64 sched_clock_cpu(int cpu);

 

 

extern void sched_clock_init(void);

 

#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK

static inline void sched_clock_tick(void)

{

}

 

static inline void sched_clock_idle_sleep_event(void)

{

}

 

static inline void sched_clock_idle_wakeup_event(u64 delta_ns)

{

}

#else

/*

 * Architectures can set this to 1 if they have specified

 * CONFIG_HAVE_UNSTABLE_SCHED_CLOCK in their arch Kconfig,

 * but then during bootup it turns out that sched_clock()

 * is reliable after all:

 */

extern int sched_clock_stable;

 

extern void sched_clock_tick(void);

extern void sched_clock_idle_sleep_event(void);

extern void sched_clock_idle_wakeup_event(u64 delta_ns);

#endif

 

extern unsigned long long

task_sched_runtime(struct task_struct *task);

extern unsigned long long thread_group_sched_runtime(struct task_struct *task);

 

/* sched_exec is called by processes performing an exec */

#ifdef CONFIG_SMP

extern void sched_exec(void);

#else

#define sched_exec()   {}

#endif

 

extern void sched_clock_idle_sleep_event(void);

extern void sched_clock_idle_wakeup_event(u64 delta_ns);

 

#ifdef CONFIG_HOTPLUG_CPU

extern void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p);

extern void idle_task_exit(void);

#else

static inline void idle_task_exit(void) {}

#endif

 

extern void sched_idle_next(void);

 

#if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP)

extern void wake_up_idle_cpu(int cpu);

#else

static inline void wake_up_idle_cpu(int cpu) { }

#endif

 

extern unsigned int sysctl_sched_latency;

extern unsigned int sysctl_sched_min_granularity;

extern unsigned int sysctl_sched_wakeup_granularity;

extern unsigned int sysctl_sched_shares_ratelimit;

extern unsigned int sysctl_sched_shares_thresh;

extern unsigned int sysctl_sched_child_runs_first;

 

enum sched_tunable_scaling {

        SCHED_TUNABLESCALING_NONE,

        SCHED_TUNABLESCALING_LOG,

        SCHED_TUNABLESCALING_LINEAR,

        SCHED_TUNABLESCALING_END,

};

extern enum sched_tunable_scaling sysctl_sched_tunable_scaling;

 

#ifdef CONFIG_SCHED_DEBUG

extern unsigned int sysctl_sched_migration_cost;

extern unsigned int sysctl_sched_nr_migrate;

extern unsigned int sysctl_sched_time_avg;

extern unsigned int sysctl_timer_migration;

 

int sched_proc_update_handler(struct ctl_table *table, int write,

                void __user *buffer, size_t *length,

                loff_t *ppos);

#endif

#ifdef CONFIG_SCHED_DEBUG

static inline unsigned int get_sysctl_timer_migration(void)

{

        return sysctl_timer_migration;

}

#else

static inline unsigned int get_sysctl_timer_migration(void)

{

        return 1;

}

#endif

extern unsigned int sysctl_sched_rt_period;

extern int sysctl_sched_rt_runtime;

 

int sched_rt_handler(struct ctl_table *table, int write,

                void __user *buffer, size_t *lenp,

                loff_t *ppos);

 

extern unsigned int sysctl_sched_compat_yield;

 

#ifdef CONFIG_SCHED_AUTOGROUP

extern unsigned int sysctl_sched_autogroup_enabled;

 

extern void sched_autogroup_create_attach(struct task_struct *p);

extern void sched_autogroup_detach(struct task_struct *p);

extern void sched_autogroup_fork(struct signal_struct *sig);

extern void sched_autogroup_exit(struct signal_struct *sig);

#else

static inline void sched_autogroup_create_attach(struct task_struct *p) { }

static inline void sched_autogroup_detach(struct task_struct *p) { }

static inline void sched_autogroup_fork(struct signal_struct *sig) { }

static inline void sched_autogroup_exit(struct signal_struct *sig) { }

#endif

 

#ifdef CONFIG_RT_MUTEXES

extern int rt_mutex_getprio(struct task_struct *p);

extern void rt_mutex_setprio(struct task_struct *p, int prio);

extern void rt_mutex_adjust_pi(struct task_struct *p);

#else

static inline int rt_mutex_getprio(struct task_struct *p)

{

        return p->normal_prio;

}

# define rt_mutex_adjust_pi(p)          do { } while (0)

#endif

 

extern void set_user_nice(struct task_struct *p, long nice);

extern int task_prio(const struct task_struct *p);

extern int task_nice(const struct task_struct *p);

extern int can_nice(const struct task_struct *p, const int nice);

extern int task_curr(const struct task_struct *p);

extern int idle_cpu(int cpu);

extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);

extern int sched_setscheduler_nocheck(struct task_struct *, int,

                                      struct sched_param *);

extern struct task_struct *idle_task(int cpu);

extern struct task_struct *curr_task(int cpu);

extern void set_curr_task(int cpu, struct task_struct *p);

 

void yield(void);

 

/*

 * The default (Linux) execution domain.

 */

extern struct exec_domain       default_exec_domain;

 

union thread_union {

        struct thread_info thread_info;

        unsigned long stack[THREAD_SIZE/sizeof(long)];

};

 

#ifndef __HAVE_ARCH_KSTACK_END

static inline int kstack_end(void *addr)

{

        /* Reliable end of stack detection:

         * Some APM bios versions misalign the stack

         */

        return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));

}

#endif

 

extern union thread_union init_thread_union;

extern struct task_struct init_task;

 

extern struct   mm_struct init_mm;

 

extern struct pid_namespace init_pid_ns;

 

/*

 * find a task by one of its numerical ids

 *

 * find_task_by_pid_ns():

 *      finds a task by its pid in the specified namespace

 * find_task_by_vpid():

 *      finds a task by its virtual pid

 *

 * see also find_vpid() etc in include/linux/pid.h

 */

 

extern struct task_struct *find_task_by_vpid(pid_t nr);

extern struct task_struct *find_task_by_pid_ns(pid_t nr,

                struct pid_namespace *ns);

 

extern void __set_special_pids(struct pid *pid);

 

/* per-UID process charging. */

extern struct user_struct * alloc_uid(struct user_namespace *, uid_t);

static inline struct user_struct *get_uid(struct user_struct *u)

{

        atomic_inc(&u->__count);

        return u;

}

extern void free_uid(struct user_struct *);

extern void release_uids(struct user_namespace *ns);

 

#include <asm/current.h>

 

extern void do_timer(unsigned long ticks);

 

extern int wake_up_state(struct task_struct *tsk, unsigned int state);

extern int wake_up_process(struct task_struct *tsk);

extern void wake_up_new_task(struct task_struct *tsk,

                                unsigned long clone_flags);

#ifdef CONFIG_SMP

 extern void kick_process(struct task_struct *tsk);

#else

 static inline void kick_process(struct task_struct *tsk) { }

#endif

extern void sched_fork(struct task_struct *p, int clone_flags);

extern void sched_dead(struct task_struct *p);

 

extern void proc_caches_init(void);

extern void flush_signals(struct task_struct *);

extern void __flush_signals(struct task_struct *);

extern void ignore_signals(struct task_struct *);

extern void flush_signal_handlers(struct task_struct *, int force_default);

extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);

 

static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)

{

        unsigned long flags;

        int ret;

 

        spin_lock_irqsave(&tsk->sighand->siglock, flags);

        ret = dequeue_signal(tsk, mask, info);

        spin_unlock_irqrestore(&tsk->sighand->siglock, flags);

 

        return ret;

}      

 

extern void block_all_signals(int (*notifier)(void *priv), void *priv,

                              sigset_t *mask);

extern void unblock_all_signals(void);

extern void release_task(struct task_struct * p);

extern int send_sig_info(int, struct siginfo *, struct task_struct *);

extern int force_sigsegv(int, struct task_struct *);

extern int force_sig_info(int, struct siginfo *, struct task_struct *);

extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);

extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);

extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32);

extern int kill_pgrp(struct pid *pid, int sig, int priv);

extern int kill_pid(struct pid *pid, int sig, int priv);

extern int kill_proc_info(int, struct siginfo *, pid_t);

extern int do_notify_parent(struct task_struct *, int);

extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);

extern void force_sig(int, struct task_struct *);

extern int send_sig(int, struct task_struct *, int);

extern int zap_other_threads(struct task_struct *p);

extern struct sigqueue *sigqueue_alloc(void);

extern void sigqueue_free(struct sigqueue *);

extern int send_sigqueue(struct sigqueue *,  struct task_struct *, int group);

extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);

extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);

 

static inline int kill_cad_pid(int sig, int priv)

{

        return kill_pid(cad_pid, sig, priv);

}

 

/* These can be the second arg to send_sig_info/send_group_sig_info.  */

#define SEND_SIG_NOINFO ((struct siginfo *) 0)

#define SEND_SIG_PRIV   ((struct siginfo *) 1)

#define SEND_SIG_FORCED ((struct siginfo *) 2)

 

/*

 * True if we are on the alternate signal stack.

 */

static inline int on_sig_stack(unsigned long sp)

{

#ifdef CONFIG_STACK_GROWSUP

        return sp >= current->sas_ss_sp &&

                sp - current->sas_ss_sp < current->sas_ss_size;

#else

        return sp > current->sas_ss_sp &&

                sp - current->sas_ss_sp <= current->sas_ss_size;

#endif

}

 

static inline int sas_ss_flags(unsigned long sp)

{

        return (current->sas_ss_size == 0 ? SS_DISABLE

                : on_sig_stack(sp) ? SS_ONSTACK : 0);

}

 

/*

 * Routines for handling mm_structs

 */

extern struct mm_struct * mm_alloc(void);

 

/* mmdrop drops the mm and the page tables */

extern void __mmdrop(struct mm_struct *);

static inline void mmdrop(struct mm_struct * mm)

{

        if (unlikely(atomic_dec_and_test(&mm->mm_count)))

                __mmdrop(mm);

}

 

/* mmput gets rid of the mappings and all user-space */

extern void mmput(struct mm_struct *);

/* Grab a reference to a task's mm, if it is not already going away */

extern struct mm_struct *get_task_mm(struct task_struct *task);

/* Remove the current tasks stale references to the old mm_struct */

extern void mm_release(struct task_struct *, struct mm_struct *);

/* Allocate a new mm structure and copy contents from tsk->mm */

extern struct mm_struct *dup_mm(struct task_struct *tsk);

 

extern int copy_thread(unsigned long, unsigned long, unsigned long,

                        struct task_struct *, struct pt_regs *);

extern void flush_thread(void);

extern void exit_thread(void);

 

extern void exit_files(struct task_struct *);

extern void __cleanup_sighand(struct sighand_struct *);

 

extern void exit_itimers(struct signal_struct *);

extern void flush_itimer_signals(void);

 

extern NORET_TYPE void do_group_exit(int);

 

extern void daemonize(const char *, ...);

extern int allow_signal(int);

extern int disallow_signal(int);

 

extern int do_execve(const char *,

                     const char __user * const __user *,

                     const char __user * const __user *, struct pt_regs *);

extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);

struct task_struct *fork_idle(int);

 

extern void set_task_comm(struct task_struct *tsk, char *from);

extern char *get_task_comm(char *to, struct task_struct *tsk);

 

#ifdef CONFIG_SMP

extern unsigned long wait_task_inactive(struct task_struct *, long match_state);

#else

static inline unsigned long wait_task_inactive(struct task_struct *p,

                                               long match_state)

{

        return 1;

}

#endif

 

#define next_task(p) \

        list_entry_rcu((p)->tasks.next, struct task_struct, tasks)

 

#define for_each_process(p) \

        for (p = &init_task ; (p = next_task(p)) != &init_task ; )

 

extern bool current_is_single_threaded(void);

 

/*

 * Careful: do_each_thread/while_each_thread is a double loop so

 *          'break' will not work as expected - use goto instead.

 */

#define do_each_thread(g, t) \

        for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do

 

#define while_each_thread(g, t) \

        while ((t = next_thread(t)) != g)

 

static inline int get_nr_threads(struct task_struct *tsk)

{

        return tsk->signal->nr_threads;

}

 

/* de_thread depends on thread_group_leader not being a pid based check */

#define thread_group_leader(p)  (p == p->group_leader)

 

/* Do to the insanities of de_thread it is possible for a process

 * to have the pid of the thread group leader without actually being

 * the thread group leader.  For iteration through the pids in proc

 * all we care about is that we have a task with the appropriate

 * pid, we don't actually care if we have the right task.

 */

static inline int has_group_leader_pid(struct task_struct *p)

{

        return p->pid == p->tgid;

}

 

static inline

int same_thread_group(struct task_struct *p1, struct task_struct *p2)

{

        return p1->tgid == p2->tgid;

}

 

static inline struct task_struct *next_thread(const struct task_struct *p)

{

        return list_entry_rcu(p->thread_group.next,

                              struct task_struct, thread_group);

}

 

static inline int thread_group_empty(struct task_struct *p)

{

        return list_empty(&p->thread_group);

}

 

#define delay_group_leader(p) \

                (thread_group_leader(p) && !thread_group_empty(p))

 

static inline int task_detached(struct task_struct *p)

{

        return p->exit_signal == -1;

}

 

/*

 * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring

 * subscriptions and synchronises with wait4().  Also used in procfs.  Also

 * pins the final release of task.io_context.  Also protects ->cpuset and

 * ->cgroup.subsys[].

 *

 * Nests both inside and outside of read_lock(&tasklist_lock).

 * It must not be nested with write_lock_irq(&tasklist_lock),

 * neither inside nor outside.

 */

static inline void task_lock(struct task_struct *p)

{

        spin_lock(&p->alloc_lock);

}

 

static inline void task_unlock(struct task_struct *p)

{

        spin_unlock(&p->alloc_lock);

}

 

extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk,

                                                        unsigned long *flags);

 

static inline void unlock_task_sighand(struct task_struct *tsk,

                                                unsigned long *flags)

{

        spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);

}

 

#ifndef __HAVE_THREAD_FUNCTIONS

 

#define task_thread_info(task)  ((struct thread_info *)(task)->stack)

#define task_stack_page(task)   ((task)->stack)

 

static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)

{

        *task_thread_info(p) = *task_thread_info(org);

        task_thread_info(p)->task = p;

}

 

static inline unsigned long *end_of_stack(struct task_struct *p)

{

        return (unsigned long *)(task_thread_info(p) + 1);

}

 

#endif

 

static inline int object_is_on_stack(void *obj)

{

        void *stack = task_stack_page(current);

 

        return (obj >= stack) && (obj < (stack + THREAD_SIZE));

}

 

extern void thread_info_cache_init(void);

 

#ifdef CONFIG_DEBUG_STACK_USAGE

static inline unsigned long stack_not_used(struct task_struct *p)

{

        unsigned long *n = end_of_stack(p);

 

        do {    /* Skip over canary */

                n++;

        } while (!*n);

 

        return (unsigned long)n - (unsigned long)end_of_stack(p);

}

#endif

 

/* set thread flags in other task's structures

 * - see asm/thread_info.h for TIF_xxxx flags available

 */

static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        set_ti_thread_flag(task_thread_info(tsk), flag);

}

 

static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        clear_ti_thread_flag(task_thread_info(tsk), flag);

}

 

static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);

}

 

static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);

}

 

static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        return test_ti_thread_flag(task_thread_info(tsk), flag);

}

 

static inline void set_tsk_need_resched(struct task_struct *tsk)

{

        set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);

}

 

static inline void clear_tsk_need_resched(struct task_struct *tsk)

{

        clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);

}

 

static inline int test_tsk_need_resched(struct task_struct *tsk)

{

        return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED));

}

 

static inline int restart_syscall(void)

{

        set_tsk_thread_flag(current, TIF_SIGPENDING);

        return -ERESTARTNOINTR;

}

 

static inline int signal_pending(struct task_struct *p)

{

        return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));

}

 

static inline int __fatal_signal_pending(struct task_struct *p)

{

        return unlikely(sigismember(&p->pending.signal, SIGKILL));

}

 

static inline int fatal_signal_pending(struct task_struct *p)

{

        return signal_pending(p) && __fatal_signal_pending(p);

}

 

static inline int signal_pending_state(long state, struct task_struct *p)

{

        if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))

                return 0;

        if (!signal_pending(p))

                return 0;

 

        return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);

}

 

static inline int need_resched(void)

{

        return unlikely(test_thread_flag(TIF_NEED_RESCHED));

}

 

/*

 * cond_resched() and cond_resched_lock(): latency reduction via

 * explicit rescheduling in places that are safe. The return

 * value indicates whether a reschedule was done in fact.

 * cond_resched_lock() will drop the spinlock before scheduling,

 * cond_resched_softirq() will enable bhs before scheduling.

 */

extern int _cond_resched(void);

 

#define cond_resched() ({                       \

        __might_sleep(__FILE__, __LINE__, 0);   \

        _cond_resched();                        \

})

 

extern int __cond_resched_lock(spinlock_t *lock);

 

#ifdef CONFIG_PREEMPT

#define PREEMPT_LOCK_OFFSET     PREEMPT_OFFSET

#else

#define PREEMPT_LOCK_OFFSET     0

#endif

 

#define cond_resched_lock(lock) ({                              \

        __might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \

        __cond_resched_lock(lock);                              \

})

 

extern int __cond_resched_softirq(void);

 

#define cond_resched_softirq() ({                               \

        __might_sleep(__FILE__, __LINE__, SOFTIRQ_OFFSET);      \

        __cond_resched_softirq();                               \

})

 

/*

 * Does a critical section need to be broken due to another

 * task waiting?: (technically does not depend on CONFIG_PREEMPT,

 * but a general need for low latency)

 */

static inline int spin_needbreak(spinlock_t *lock)

{

#ifdef CONFIG_PREEMPT

        return spin_is_contended(lock);

#else

        return 0;

#endif

}

 

/*

 * Thread group CPU time accounting.

 */

void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times);

void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times);

 

static inline void thread_group_cputime_init(struct signal_struct *sig)

{

        spin_lock_init(&sig->cputimer.lock);

}

 

/*

 * Reevaluate whether the task has signals pending delivery.

 * Wake the task if so.

 * This is required every time the blocked sigset_t changes.

 * callers must hold sighand->siglock.

 */

extern void recalc_sigpending_and_wake(struct task_struct *t);

extern void recalc_sigpending(void);

 

extern void signal_wake_up(struct task_struct *t, int resume_stopped);

 

/*

 * Wrappers for p->thread_info->cpu access. No-op on UP.

 */

#ifdef CONFIG_SMP

 

static inline unsigned int task_cpu(const struct task_struct *p)

{

        return task_thread_info(p)->cpu;

}

 

extern void set_task_cpu(struct task_struct *p, unsigned int cpu);

 

#else

 

static inline unsigned int task_cpu(const struct task_struct *p)

{

        return 0;

}

 

static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)

{

}

 

#endif /* CONFIG_SMP */

 

extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);

extern long sched_getaffinity(pid_t pid, struct cpumask *mask);

 

extern void normalize_rt_tasks(void);

 

#ifdef CONFIG_CGROUP_SCHED

 

extern struct task_group init_task_group;

 

extern struct task_group *sched_create_group(struct task_group *parent);

extern void sched_destroy_group(struct task_group *tg);

extern void sched_move_task(struct task_struct *tsk);

#ifdef CONFIG_FAIR_GROUP_SCHED

extern int sched_group_set_shares(struct task_group *tg, unsigned long shares);

extern unsigned long sched_group_shares(struct task_group *tg);

#endif

#ifdef CONFIG_RT_GROUP_SCHED

extern int sched_group_set_rt_runtime(struct task_group *tg,

                                      long rt_runtime_us);

extern long sched_group_rt_runtime(struct task_group *tg);

extern int sched_group_set_rt_period(struct task_group *tg,

                                      long rt_period_us);

extern long sched_group_rt_period(struct task_group *tg);

extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk);

#endif

#endif

 

extern int task_can_switch_user(struct user_struct *up,

                                        struct task_struct *tsk);

 

#ifdef CONFIG_TASK_XACCT

static inline void add_rchar(struct task_struct *tsk, ssize_t amt)

{

        tsk->ioac.rchar += amt;

}

 

static inline void add_wchar(struct task_struct *tsk, ssize_t amt)

{

        tsk->ioac.wchar += amt;

}

 

static inline void inc_syscr(struct task_struct *tsk)

{

        tsk->ioac.syscr++;

}

 

static inline void inc_syscw(struct task_struct *tsk)

{

        tsk->ioac.syscw++;

}

#else

static inline void add_rchar(struct task_struct *tsk, ssize_t amt)

{

}

 

static inline void add_wchar(struct task_struct *tsk, ssize_t amt)

{

}

 

static inline void inc_syscr(struct task_struct *tsk)

{

}

 

static inline void inc_syscw(struct task_struct *tsk)

{

}

#endif

 

#ifndef TASK_SIZE_OF

#define TASK_SIZE_OF(tsk)       TASK_SIZE

#endif

 

/*

 * Call the function if the target task is executing on a CPU right now:

 */

extern void task_oncpu_function_call(struct task_struct *p,

                                     void (*func) (void *info), void *info);

 

 

#ifdef CONFIG_MM_OWNER

extern void mm_update_next_owner(struct mm_struct *mm);

extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);

#else

static inline void mm_update_next_owner(struct mm_struct *mm)

{

}

 

static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)

{

}

#endif /* CONFIG_MM_OWNER */

 

static inline unsigned long task_rlimit(const struct task_struct *tsk,

                unsigned int limit)

{

        return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_cur);

}

 

static inline unsigned long task_rlimit_max(const struct task_struct *tsk,

                unsigned int limit)

{

        return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_max);

}

 

static inline unsigned long rlimit(unsigned int limit)

{

        return task_rlimit(current, limit);

}

 

static inline unsigned long rlimit_max(unsigned int limit)

{

        return task_rlimit_max(current, limit);

}

 

#endif /* __KERNEL__ */

 

#endif