From: Pavel Emelyanov This function operated on a pid_t to kill a task, which is no longer valid in a containerized system. It has finally lost all its users and we can safely remove it from the tree. Signed-off-by: Pavel Emelyanov Cc: Oleg Nesterov Cc: "Eric W. Biederman" Signed-off-by: Andrew Morton --- include/linux/sched.h | 1 - kernel/signal.c | 12 ------------ 2 files changed, 13 deletions(-) diff -puN include/linux/sched.h~pidns-remove-now-unused-kill_proc-function include/linux/sched.h --- a/include/linux/sched.h~pidns-remove-now-unused-kill_proc-function +++ a/include/linux/sched.h @@ -1774,7 +1774,6 @@ extern void force_sig(int, struct task_s extern void force_sig_specific(int, struct task_struct *); extern int send_sig(int, struct task_struct *, int); extern void zap_other_threads(struct task_struct *p); -extern int kill_proc(pid_t, int, int); extern struct sigqueue *sigqueue_alloc(void); extern void sigqueue_free(struct sigqueue *); extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group); diff -puN kernel/signal.c~pidns-remove-now-unused-kill_proc-function kernel/signal.c --- a/kernel/signal.c~pidns-remove-now-unused-kill_proc-function +++ a/kernel/signal.c @@ -1228,17 +1228,6 @@ int kill_pid(struct pid *pid, int sig, i } EXPORT_SYMBOL(kill_pid); -int -kill_proc(pid_t pid, int sig, int priv) -{ - int ret; - - rcu_read_lock(); - ret = kill_pid_info(sig, __si_special(priv), find_pid(pid)); - rcu_read_unlock(); - return ret; -} - /* * These functions support sending signals using preallocated sigqueue * structures. This is needed "because realtime applications cannot @@ -1874,7 +1863,6 @@ EXPORT_SYMBOL(recalc_sigpending); EXPORT_SYMBOL_GPL(dequeue_signal); EXPORT_SYMBOL(flush_signals); EXPORT_SYMBOL(force_sig); -EXPORT_SYMBOL(kill_proc); EXPORT_SYMBOL(ptrace_notify); EXPORT_SYMBOL(send_sig); EXPORT_SYMBOL(send_sig_info); _