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signal: sys_pause() should check signal_pending() 

ERESTART* is always wrong without TIF_SIGPENDING. Teach sys_pause()
to handle the spurious wakeup correctly.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
This commit is contained in:
Oleg Nesterov 2011-05-25 19:22:27 +02:00
parent 0666fb51b1
commit d92fcf0552
1 changed files with 4 additions and 2 deletions
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2
kernel/signal.c
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@ -3023,8 +3023,10 @@ SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler)
SYSCALL_DEFINE0(pause) SYSCALL_DEFINE0(pause)
{ {
while (!signal_pending(current)) {
current->state = TASK_INTERRUPTIBLE; current->state = TASK_INTERRUPTIBLE;
schedule(); schedule();
}
return -ERESTARTNOHAND; return -ERESTARTNOHAND;
} }