From: Pavel Machek <pavel@ucw.cz>
Date: Sat, 3 Sep 2005 22:56:53 +0000 (-0700)
Subject: [PATCH] remove busywait in refrigerator
X-Git-Tag: v2.6.14-rc1~841
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=2a23b5d1e119fd10e25b8e93464c8d549f5a5c5d;p=linux-2.6-omap-h63xx.git

[PATCH] remove busywait in refrigerator

This should make refrigerator sleep properly, not busywait after the first
schedule() returns.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/kernel/power/process.c b/kernel/power/process.c
index 3bd0d261818..f7da5bfc914 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -38,7 +38,6 @@ void refrigerator(void)
 	   processes around? */
 	long save;
 	save = current->state;
-	current->state = TASK_UNINTERRUPTIBLE;
 	pr_debug("%s entered refrigerator\n", current->comm);
 	printk("=");
 
@@ -47,8 +46,10 @@ void refrigerator(void)
 	recalc_sigpending(); /* We sent fake signal, clean it up */
 	spin_unlock_irq(&current->sighand->siglock);
 
-	while (frozen(current))
+	while (frozen(current)) {
+		current->state = TASK_UNINTERRUPTIBLE;
 		schedule();
+	}
 	pr_debug("%s left refrigerator\n", current->comm);
 	current->state = save;
 }