linux-kernel - [PATCH -mm] Move frozen_process() to kernel/power/process.c

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Message-ID: <20070426131155.GE12892@in.ibm.com>
Date:	Thu, 26 Apr 2007 18:41:55 +0530
From:	Gautham R Shenoy <ego@...ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: [PATCH -mm] Move frozen_process() to kernel/power/process.c

Hi Andrew, 
Here's the patch against 2.6.21-rc7-mm2.

-->

Other than refrigerator, no one else calls frozen_process(). So move it from 
include/linux/freezer.h to kernel/power/process.c.

Also, since a task can be marked frozen by itself, we don't need to pass
the (struct task_struct *p) parameter to frozen_process().

Signed-off-by: Gautham R Shenoy <ego@...ibm.com>
---
 include/linux/freezer.h |   12 ------------
 kernel/power/process.c  |   14 +++++++++++++-
 2 files changed, 13 insertions(+), 13 deletions(-)

Index: linux-2.6.21-rc7/include/linux/freezer.h
===================================================================
--- linux-2.6.21-rc7.orig/include/linux/freezer.h
+++ linux-2.6.21-rc7/include/linux/freezer.h
@@ -58,18 +58,6 @@ static inline int thaw_process(struct ta
 	return 0;
 }
 
-/*
- * freezing is complete, mark process as frozen
- */
-static inline void frozen_process(struct task_struct *p)
-{
-	if (!unlikely(p->flags & PF_NOFREEZE)) {
-		p->flags |= PF_FROZEN;
-		wmb();
-	}
-	clear_tsk_thread_flag(p, TIF_FREEZE);
-}
-
 extern void refrigerator(void);
 extern int freeze_processes(void);
 extern void thaw_processes(void);
Index: linux-2.6.21-rc7/kernel/power/process.c
===================================================================
--- linux-2.6.21-rc7.orig/kernel/power/process.c
+++ linux-2.6.21-rc7/kernel/power/process.c
@@ -32,6 +32,18 @@ static inline int freezeable(struct task
 	return 1;
 }
 
+/*
+ * freezing is complete, mark current process as frozen
+ */
+static inline void frozen_process(void)
+{
+	if (!unlikely(current->flags & PF_NOFREEZE)) {
+		current->flags |= PF_FROZEN;
+		wmb();
+	}
+	clear_tsk_thread_flag(current, TIF_FREEZE);
+}
+
 /* Refrigerator is place where frozen processes are stored :-). */
 void refrigerator(void)
 {
@@ -41,7 +53,7 @@ void refrigerator(void)
 
 	task_lock(current);
 	if (freezing(current)) {
-		frozen_process(current);
+		frozen_process();
 		task_unlock(current);
 	} else {
 		task_unlock(current);
-- 
Gautham R Shenoy
Linux Technology Center
IBM India.
"Freedom comes with a price tag of responsibility, which is still a bargain,
because Freedom is priceless!"
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