From: Rafael J. Wysocki <rjw@sisk.pl>
Date: Sun, 6 May 2007 21:50:48 +0000 (-0700)
Subject: freezer: fix racy usage of try_to_freeze in kswapd
X-Git-Tag: v2.6.22-rc1~898
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b1296cc48b39355241470ef934a5e2270e3f23bd;p=pandora-kernel.git

freezer: fix racy usage of try_to_freeze in kswapd

Currently we can miss freeze_process()->signal_wake_up() in kswapd() if it
happens between try_to_freeze() and prepare_to_wait().  To prevent this
from happening we should check freezing(current) before calling schedule().

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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