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watchdog: fix double lock in watchdog_nmi_enable_all 

Commit ab992dc38f ("watchdog: Fix merge 'conflict'") has introduced an
obvious deadlock because of a typo.  watchdog_proc_mutex should be
unlocked on exit.

Thanks to Miroslav Benes who was staring at the code with me and noticed
this.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Duh-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michal Hocko 2015-05-19 09:07:27 +02:00 committed by Linus Torvalds
parent e26081808e
commit 1173ff09b9
1 changed files with 1 additions and 1 deletions
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2
kernel/watchdog.c
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@ -621,7 +621,7 @@ void watchdog_nmi_enable_all(void)
put_online_cpus();
unlock:
mutex_lock(&watchdog_proc_mutex);
mutex_unlock(&watchdog_proc_mutex);
}
void watchdog_nmi_disable_all(void)