From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Wed, 29 Mar 2006 00:11:22 +0000 (-0800)
Subject: [PATCH] relax sig_needs_tasklist()
X-Git-Tag: v2.6.17-rc1~178
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6108ccd3e2f3012d5eec582e0af4d75e693824da;p=linux-2.6

[PATCH] relax sig_needs_tasklist()

handle_stop_signal() does not need tasklist_lock for SIG_KERNEL_STOP_MASK
signals anymore.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
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 6ea49f742a..e99ec2f891 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -146,8 +146,7 @@ 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_needs_tasklist(sig)	((sig) == SIGCONT)
 
 #define sig_user_defined(t, signr) \
 	(((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) &&	\