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Commit a9e88e84 authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Linus Torvalds
Browse files

[PATCH] introduce sig_needs_tasklist() helper 



In my opinion this patch cleans up the code.

Signed-off-by: default avatarOleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f63ee72e

kernel/signal.c

+4 −1
Original line number Diff line number Diff line
@@ -147,6 +147,9 @@ static kmem_cache_t *sigqueue_cachep; 
#define sig_kernel_stop(sig) \

		(((sig) < SIGRTMIN)  && T(sig, SIG_KERNEL_STOP_MASK))



#define sig_needs_tasklist(sig) \

		(((sig) < SIGRTMIN)  && T(sig, SIG_KERNEL_STOP_MASK | M(SIGCONT)))



#define sig_user_defined(t, signr) \

	(((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) &&	\

	 ((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_IGN))
@@ -1199,7 +1202,7 @@ kill_proc_info(int sig, struct siginfo *info, pid_t pid) 
	struct task_struct *p;



	rcu_read_lock();

	if (unlikely(sig_kernel_stop(sig) || sig == SIGCONT)) {

	if (unlikely(sig_needs_tasklist(sig))) {

		read_lock(&tasklist_lock);

		acquired_tasklist_lock = 1;

	}