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call_usermodehelper: no need to unblock signals 

____call_usermodehelper() correctly calls flush_signal_handlers() to set
SIG_DFL, but sigemptyset(->blocked) and recalc_sigpending() are not
needed.

This kthread was forked by workqueue thread, all signals must be unblocked
and ignored, no pending signal is possible.

Signed-off-by: Oleg Nesterov <oleg@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 2010-05-26 14:43:02 -07:00 committed by Linus Torvalds
parent c70a626d3e
commit 363da4022c
1 changed files with 0 additions and 3 deletions
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3
kernel/kmod.c
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@ -134,11 +134,8 @@ static int ____call_usermodehelper(void *data)
struct subprocess_info *sub_info = data;
int retval;
/* Unblock all signals */
spin_lock_irq(&current->sighand->siglock);
flush_signal_handlers(current, 1);
sigemptyset(&current->blocked);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
/* We can run anywhere, unlike our parent keventd(). */