From: Kent Overstreet <koverstreet@google.com>
Date: Fri, 7 Sep 2012 20:44:01 +0000 (-0700)
Subject: dm: Use bioset's front_pad for dm_rq_clone_bio_info
X-Git-Tag: v3.7-rc1~54^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94818742316e27d01506240cf8b07d69844d31af;p=pandora-kernel.git

dm: Use bioset's front_pad for dm_rq_clone_bio_info

Previously, dm_rq_clone_bio_info needed to be freed by the bio's
destructor to avoid a memory leak in the blk_rq_prep_clone() error path.
This gets rid of a memory allocation and means we can kill
dm_rq_bio_destructor.

The _rq_bio_info_cache kmem cache is unused now and needs to be deleted,
but due to the way io_pool is used and overloaded this looks not quite
trivial so I'm leaving it for a later patch.

v6: Fix comment on struct dm_rq_clone_bio_info, per Tejun

Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Alasdair Kergon <agk@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

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