From: Joe Thornber <ejt@redhat.com>
Date: Fri, 1 Mar 2013 22:45:50 +0000 (+0000)
Subject: dm bio prison: pass cell memory in
X-Git-Tag: v3.9-rc1~19^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6beca5eb6e801aea810da6cbc4990d96e6c1c0bc;p=pandora-kernel.git

dm bio prison: pass cell memory in

Change the dm_bio_prison interface so that instead of allocating memory
internally, dm_bio_detain is supplied with a pre-allocated cell each
time it is called.

This enables a subsequent patch to move the allocation of the struct
dm_bio_prison_cell outside the thin target's mapping function so it can
no longer block there.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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