From: Mikulas Patocka <mpatocka@redhat.com>
Date: Fri, 27 Jul 2012 14:08:02 +0000 (+0100)
Subject: dm stripe: optimize chunk_size calculations
X-Git-Tag: v3.6-rc1~56^2~48
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33d07c0dfab902a7c5420587984497dc05ab5c9c;p=pandora-kernel.git

dm stripe: optimize chunk_size calculations

dm-stripe is usually used with a chunk size that is a power of two.
Use faster shifts and bit masks in such cases.

stripe_width is already optimized in a similar way.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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