Commit e0f4bd26 authored by Kevin Hao's avatar Kevin Hao Committed by Rafael J. Wysocki
Browse files

PM: sleep: Remove obsolete comment from unlock_system_sleep() 



With the freezer changes introduced by commit f5d39b02
("freezer,sched: Rewrite core freezer logic"), the comment in
unlock_system_sleep() has become obsolete, there is no need to
retain it.

Signed-off-by: default avatarKevin Hao <haokexin@gmail.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 4bbf0b6a

kernel/power/main.c

+0 −16
Original line number Diff line number Diff line
@@ -60,22 +60,6 @@ EXPORT_SYMBOL_GPL(lock_system_sleep); 


void unlock_system_sleep(unsigned int flags)

{

	/*

	 * Don't use freezer_count() because we don't want the call to

	 * try_to_freeze() here.

	 *

	 * Reason:

	 * Fundamentally, we just don't need it, because freezing condition

	 * doesn't come into effect until we release the

	 * system_transition_mutex lock, since the freezer always works with

	 * system_transition_mutex held.

	 *

	 * More importantly, in the case of hibernation,

	 * unlock_system_sleep() gets called in snapshot_read() and

	 * snapshot_write() when the freezing condition is still in effect.

	 * Which means, if we use try_to_freeze() here, it would make them

	 * enter the refrigerator, thus causing hibernation to lockup.

	 */

	if (!(flags & PF_NOFREEZE))

		current->flags &= ~PF_NOFREEZE;

	mutex_unlock(&system_transition_mutex);