From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Fri, 25 Jul 2008 08:47:27 +0000 (-0700)
Subject: signals: collect_signal: remove the unneeded sigismember() check
X-Git-Tag: v2.6.27-rc1~360
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6715ca451cfff1c9ce4b33ad9918a1dacf43997c;p=linux-2.6

signals: collect_signal: remove the unneeded sigismember() check

collect_signal() checks sigismember(&list->signal, sig), this is not
needed.  This "sig" was just found by next_signal(), so it must be valid.

We have a (completely broken) call to ->notifier in between, but it must
not play with sigpending->signal bits or unlock ->siglock.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/signal.c b/kernel/signal.c
index 6c0958e52e..c5b9aabb15 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -343,9 +343,6 @@ static int collect_signal(int sig, struct sigpending *list, siginfo_t *info)
 	struct sigqueue *q, *first = NULL;
 	int still_pending = 0;
 
-	if (unlikely(!sigismember(&list->signal, sig)))
-		return 0;
-
 	/*
 	 * Collect the siginfo appropriate to this signal.  Check if
 	 * there is another siginfo for the same signal.