From: Steven Whitehouse <swhiteho@redhat.com>
Date: Wed, 2 Oct 2013 13:42:45 +0000 (+0100)
Subject: GFS2: Speed up starting point selection for block allocation
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~55^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e07f2cb3d7a93f4b1b18fc6e4dd6911dcba2442;p=pandora-kernel.git

GFS2: Speed up starting point selection for block allocation

When setting the starting point for block allocation, there were calls
to both gfs2_rbm_to_block() and gfs2_rbm_from_block() in the common case
of there being an active reservation. The gfs2_rbm_from_block() function
can be quite slow, and since the two conversions were effectively a
no-op, it makes sense to avoid them entirely in this case.

There is no functional change here, but the code should be a bit more
efficient after this patch.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---

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