linux-kernel - [PATCH 7/7] Freezer: Move frozen_process to kernel/power/process.c

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Date:	Fri, 11 May 2007 00:44:23 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Gautham R Shenoy <ego@...ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...sign.ru>, Pavel Machek <pavel@....cz>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [PATCH 7/7] Freezer: Move frozen_process to kernel/power/process.c

From: Gautham R Shenoy <ego@...ibm.com>

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 as 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>
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 include/linux/freezer.h |   13 -------------
 kernel/power/process.c  |   14 +++++++++++++-
 2 files changed, 13 insertions(+), 14 deletions(-)

Index: linux-2.6/include/linux/freezer.h
===================================================================
--- linux-2.6.orig/include/linux/freezer.h	2007-05-10 21:44:47.000000000 +0200
+++ linux-2.6/include/linux/freezer.h	2007-05-10 21:44:50.000000000 +0200
@@ -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);
@@ -132,7 +120,6 @@ static inline int frozen(struct task_str
 static inline int freezing(struct task_struct *p) { return 0; }
 static inline void freeze(struct task_struct *p) { BUG(); }
 static inline int thaw_process(struct task_struct *p) { return 1; }
-static inline void frozen_process(struct task_struct *p) { BUG(); }
 
 static inline void refrigerator(void) {}
 static inline int freeze_processes(void) { BUG(); return 0; }
Index: linux-2.6/kernel/power/process.c
===================================================================
--- linux-2.6.orig/kernel/power/process.c	2007-05-10 21:44:40.000000000 +0200
+++ linux-2.6/kernel/power/process.c	2007-05-10 21:44:50.000000000 +0200
@@ -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);

-
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