commit b1296cc48b39355241470ef934a5e2270e3f23bd
author Rafael J. Wysocki <rjw@sisk.pl> Sun May 06 14:50:48 2007 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> Mon May 07 12:12:59 2007 -0700
tree cfaf24de442b9ce19414f67106461f7c4829a1a7
parent d1d241cc2c5feec057c370aa71637380b1b945d5

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>