tree 2c9019e43218a3afc92fbb32a44de794123295f4
parent 9cedc194a7735e5d74ad26d3825247dc65a4d98e
author Jens Axboe <axboe@suse.de> 1150305117 +0200
committer Linus Torvalds <torvalds@g5.osdl.org> 1150305736 -0700

[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>