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PM / Sleep: Use the freezer_count() functions in [un]lock_system_sleep() APIs

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Now that freezer_count() and freezer_do_not_count() don't have the restriction
that they are effective only when called by userspace processes, use
them in lock_system_sleep() and unlock_system_sleep() instead of open-coding
their parts.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Srivatsa S. Bhat 2011-12-06 23:18:12 +01:00 committed by Rafael J. Wysocki
parent 43753e58b1
commit 33e638b907
1 changed files with 3 additions and 4 deletions
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7
include/linux/suspend.h
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@ -6,6 +6,7 @@
#include <linux/init.h>
#include <linux/pm.h>
#include <linux/mm.h>
#include <linux/freezer.h>
#include <asm/errno.h>
#ifdef CONFIG_VT
@ -380,16 +381,14 @@ static inline void unlock_system_sleep(void) {}
static inline void lock_system_sleep(void)
{
/* simplified freezer_do_not_count() */
current->flags |= PF_FREEZER_SKIP;
freezer_do_not_count();
mutex_lock(&pm_mutex);
}
static inline void unlock_system_sleep(void)
{
mutex_unlock(&pm_mutex);
/* simplified freezer_count() */
current->flags &= ~PF_FREEZER_SKIP;
freezer_count();
}
#endif