From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Wed, 29 Mar 2006 00:11:14 +0000 (-0800)
Subject: [PATCH] introduce sig_needs_tasklist() helper
X-Git-Tag: v2.6.17-rc1~187
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a9e88e84b5245da0a1dadb6ccca70ae84e93ccf6;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

[PATCH] introduce sig_needs_tasklist() helper

In my opinion this patch cleans up the code.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/kernel/signal.c b/kernel/signal.c
index 819fa49..c5b65aa 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -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;
 	}