From: Joe Thornber <ejt@redhat.com>
Date: Mon, 6 Oct 2014 12:48:51 +0000 (+0100)
Subject: dm bufio: switch from a huge hash table to an rbtree
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~22^2~48
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e420c452b11edf9d510c8180ac66f529e5b6206;p=pandora-kernel.git

dm bufio: switch from a huge hash table to an rbtree

Converting over to using an rbtree eliminates a fixed 8MB allocation
from vmalloc space for the hash table.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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