linux-kernel - [PATCH 2/2] PM: Use the freezer_count() functions in [un]lock_system

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Message-ID: <20111206160353.16729.91096.stgit@srivatsabhat.in.ibm.com>
Date:	Tue, 06 Dec 2011 21:34:02 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	rjw@...k.pl
Cc:	pavel@....cz, len.brown@...el.com, tj@...nel.org, oleg@...hat.com,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH 2/2] PM: Use the freezer_count() functions in
 [un]lock_system_sleep() APIs

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@...ux.vnet.ibm.com>
---

 include/linux/suspend.h |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 1f7fff4..906d62c 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -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
 

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