linux-kernel - [PATCH -mm 3/3] Freezer: Remove redundant check in try_to_freeze

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Message-Id: <200705271304.48177.rjw@sisk.pl>
Date:	Sun, 27 May 2007 13:04:47 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Gautham R Shenoy <ego@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...sign.ru>, Pavel Machek <pavel@....cz>
Subject: [PATCH -mm 3/3] Freezer: Remove redundant check in try_to_freeze_tasks

From: Rafael J. Wysocki <rjw@...k.pl>

We don't need to check if todo is positive before calling time_after() in
try_to_freeze_tasks(), because if todo is zero at this point, the loop will
be broken anyway due to the while () condition being false.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Acked-by: Pavel Machek <pavel@....cz>
---
 kernel/power/process.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.22-rc2/kernel/power/process.c
===================================================================
--- linux-2.6.22-rc2.orig/kernel/power/process.c
+++ linux-2.6.22-rc2/kernel/power/process.c
@@ -149,7 +149,7 @@ static int try_to_freeze_tasks(int freez
 		} while_each_thread(g, p);
 		read_unlock(&tasklist_lock);
 		yield();			/* Yield is okay here */
-		if (todo && time_after(jiffies, end_time))
+		if (time_after(jiffies, end_time))
 			break;
 	} while (todo);
 
-
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