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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>
This commit is contained in:
Oleg Nesterov 2008-07-25 01:47:27 -07:00 committed by Linus Torvalds
parent 96347e7759
commit 6715ca451c
1 changed files with 0 additions and 3 deletions
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3
kernel/signal.c
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@ -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.