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PM / Sleep: Replace mutex_[un]lock(&pm_mutex) with [un]lock_system_sleep()

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Using [un]lock_system_sleep() is safer than directly using mutex_[un]lock()
on 'pm_mutex', since the latter could lead to freezing failures. Hence convert
all the present users of mutex_[un]lock(&pm_mutex) to use these safe APIs
instead.

Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Srivatsa S. Bhat
2011-12-07 22:29:54 +01:00
committed by Rafael J. Wysocki
parent 9b6fc5dc87
commit bcda53faf5
5 changed files with 22 additions and 22 deletions
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kernel/kexec.c
+2 -2
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@@ -1523,7 +1523,7 @@ int kernel_kexec(void)
#ifdef CONFIG_KEXEC_JUMP
if (kexec_image->preserve_context) {
mutex_lock(&pm_mutex);
lock_system_sleep();
pm_prepare_console();
error = freeze_processes();
if (error) {
@@ -1576,7 +1576,7 @@ int kernel_kexec(void)
thaw_processes();
Restore_console:
pm_restore_console();
mutex_unlock(&pm_mutex);
unlock_system_sleep();
}
#endif