In file included from include/linux/spinlock.h:87:0,
                 from include/linux/rcupdate.h:38,
                 from include/linux/rculist.h:10,
                 from include/linux/perf_event.h:40,
                 from arch/arm/kernel/perf_callchain.c:9:
./arch/arm/include/asm/spinlock.h:184:20: warning: variable ‘arch_write_unlock’ declared ‘inline’
 static inline void arch_write_unlock(arch_rwlock_t *rw)
                    ^
./arch/arm/include/asm/spinlock.h:185:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
In file included from include/linux/mmzone.h:15:0,
                 from include/linux/gfp.h:5,
                 from include/linux/mm.h:9,
                 from mm/maccess.c:5:
include/linux/seqlock.h:449:20: warning: variable ‘write_sequnlock’ declared ‘inline’
 static inline void write_sequnlock(seqlock_t *sl)
                    ^
include/linux/seqlock.h:450:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
 {
 ^
In file included from include/linux/spinlock_api_smp.h:192:0,
                 from include/linux/spinlock.h:280,
                 from include/linux/rcupdate.h:38,
                 from include/linux/rculist.h:10,
                 from include/linux/perf_event.h:40,
                 from arch/arm/kernel/perf_callchain.c:9:
include/linux/rwlock_api_smp.h: In function ‘__raw_write_unlock’:
include/linux/rwlock_api_smp.h:219:2: error: implicit declaration of function ‘arch_write_unlock’ [-Werror=implicit-function-declaration]
  do_raw_write_unlock(lock);
  ^
scripts/Makefile.build:258: recipe for target 'mm/maccess.o' failed
make[1]: *** [mm/maccess.o] Error 1
Makefile:961: recipe for target 'mm' failed
make: *** [mm] Error 2
make: *** Waiting for unfinished jobs....
  CC      fs/char_dev.o
cc1: some warnings being treated as errors
scripts/Makefile.build:258: recipe for target 'arch/arm/kernel/perf_callchain.o' failed
make[1]: *** [arch/arm/kernel/perf_callchain.o] Error 1
Makefile:961: recipe for target 'arch/arm/kernel' failed
make: *** [arch/arm/kernel] Error 2
  CC      kernel/sysctl.o
  CC      fs/stat.o
  CC      kernel/sysctl_binary.o
  CC      fs/exec.o
  CC      fs/pipe.o
  CC      kernel/capability.o
  CC      fs/namei.o
  CC      kernel/ptrace.o
  CC      kernel/user.o
  CC      fs/fcntl.o
  CC      fs/ioctl.o
  CC      kernel/signal.o
fs/ioctl.c: In function ‘__generic_block_fiemap’:
fs/ioctl.c:394:1: internal compiler error: Segmentation fault
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.9/README.Bugs> for instructions.
  CC      kernel/sys.o
The bug is not reproducible, so it is likely a hardware or OS problem.
scripts/Makefile.build:258: recipe for target 'fs/ioctl.o' failed
make[1]: *** [fs/ioctl.o] Error 1
make[1]: *** Waiting for unfinished jobs....
  CC      kernel/kmod.o
Makefile:961: recipe for target 'fs' failed
make: *** [fs] Error 2
  CC      kernel/workqueue.o
  CC      kernel/pid.o
  CC      kernel/task_work.o
  CC      kernel/extable.o
  CC      kernel/params.o
kernel/pid.c: In function ‘alloc_pid’:
kernel/pid.c:297:13: internal compiler error: Segmentation fault
 struct pid *alloc_pid(struct pid_namespace *ns)
             ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.9/README.Bugs> for instructions.
  CC      kernel/kthread.o
  CC      kernel/sys_ni.o
The bug is not reproducible, so it is likely a hardware or OS problem.
scripts/Makefile.build:258: recipe for target 'kernel/pid.o' failed
make[1]: *** [kernel/pid.o] Error 1
make[1]: *** Waiting for unfinished jobs....
  CC      kernel/nsproxy.o
Makefile:961: recipe for target 'kernel' failed
make: *** [kernel] Error 2