From: Jens Axboe <axboe@suse.de>
Date: Wed, 14 Jun 2006 17:11:57 +0000 (+0200)
Subject: [PATCH] cfq-iosched: fix crash in do_div()
X-Git-Tag: v2.6.17~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=553698f944ed715dfe023b4cef07601f0ce735f0;p=pandora-kernel.git

[PATCH] cfq-iosched: fix crash in do_div()

We don't clear the seek stat values in cfq_alloc_io_context(), and if
->seek_mean is unlucky enough to be set to -36 by chance, the first
invocation of cfq_update_io_seektime() will oops with a divide by zero
in do_div().

Just memset the entire cic instead of filling invididual values
independently.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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