From: Filipe Manana <fdmanana@gmail.com>
Date: Mon, 31 Mar 2014 13:53:25 +0000 (+0100)
Subject: Btrfs: more efficient io tree navigation on wait_extent_bit
X-Git-Tag: v3.15-rc1~23^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c50d3e71c3d0378bcc9e116f48dab4148854a7bb;p=pandora-kernel.git

Btrfs: more efficient io tree navigation on wait_extent_bit

If we don't reschedule use rb_next to find the next extent state
instead of a full tree search, which is more efficient and safe
since we didn't release the io tree's lock.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
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