CC      fs/proc/cmdline.o
fs/proc/cmdline.c: In function 'cmdline_proc_show':
fs/proc/cmdline.c:9:2: error: implicit declaration of function 'current_uid' [-Werror=implicit-function-declaration]
  if (uid_eq(current_uid(), GLOBAL_ROOT_UID) ||
  ^
fs/proc/cmdline.c:9:6: error: incompatible type for argument 1 of 'uid_eq'
  if (uid_eq(current_uid(), GLOBAL_ROOT_UID) ||
      ^
In file included from include/linux/stat.h:19:0,
                 from include/linux/fs.h:10,
                 from fs/proc/cmdline.c:1:
include/linux/uidgid.h:48:20: note: expected 'kuid_t' but argument is of type 'int'
 static inline bool uid_eq(kuid_t left, kuid_t right)
                    ^
fs/proc/cmdline.c:11:3: error: implicit declaration of function 'in_group_p' [-Werror=implicit-function-declaration]
   in_group_p(grsec_proc_gid)
   ^
fs/proc/cmdline.c:11:14: error: 'grsec_proc_gid' undeclared (first use in this function)
   in_group_p(grsec_proc_gid)
              ^
fs/proc/cmdline.c:11:14: note: each undeclared identifier is reported only once for each function it appears in
cc1: some warnings being treated as errors
scripts/Makefile.build:257: recipe for target 'fs/proc/cmdline.o' failed
make[4]: *** [fs/proc/cmdline.o] Error 1
scripts/Makefile.build:404: recipe for target 'fs/proc' failed
make[3]: *** [fs/proc] Error 2
make[3]: *** Waiting for unfinished jobs....