From 2a23b5d1e119fd10e25b8e93464c8d549f5a5c5d Mon Sep 17 00:00:00 2001
From: Pavel Machek <pavel@ucw.cz>
Date: Sat, 3 Sep 2005 15:56:53 -0700
Subject: [PATCH] [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>
---
kernel/power/process.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/power/process.c b/kernel/power/process.c
index 3bd0d261818f..f7da5bfc914e 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(¤t->sighand->siglock);
- while (frozen(current))
+ while (frozen(current)) {
+ current->state = TASK_UNINTERRUPTIBLE;
schedule();
+ }
pr_debug("%s left refrigerator\n", current->comm);
current->state = save;
}