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signals: send_signal: be paranoid about signalfd_notify()

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send_signal() shouldn't call signalfd_notify() if it then fails with -EAGAIN.
Harmless, just a paranoid cleanup.

Also remove the comment.  It is obsolete, signalfd_notify() was simplified and
does a simple wakeup.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Davide Libenzi <davidel@xmailserver.org>
Cc: 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 2008-04-30 00:53:00 -07:00 committed by Linus Torvalds
parent 021e1ae3d8
commit 53c30337f2
1 changed files with 1 additions and 7 deletions
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8
kernel/signal.c
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@ -772,13 +772,6 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
*/
if (legacy_queue(pending, sig))
return 0;
/*
* Deliver the signal to listening signalfds. This must be called
* with the sighand lock held.
*/
signalfd_notify(t, sig);
/*
* fast-pathed signals for kernel-internal things like SIGSTOP
* or SIGKILL.
@ -828,6 +821,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
}
out_set:
signalfd_notify(t, sig);
sigaddset(&pending->signal, sig);
complete_signal(sig, t, group);
return 0;