From: David Sterba <dsterba@suse.cz>
Date: Fri, 16 Jan 2015 16:21:12 +0000 (+0100)
Subject: btrfs: cleanup 64bit/32bit divs, compile time constants
X-Git-Tag: omap-for-v4.1/fixes-rc1~43^2~57^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16068ec19f497bd80552332b4523150884888a7a;p=pandora-kernel.git

btrfs: cleanup 64bit/32bit divs, compile time constants

Switch to div_u64 if the divisor is a numeric constant or sum of
sizeof()s. We can remove a few instances of do_div that has the hidden
semtantics of changing the 1st argument.

Small power-of-two divisors are converted to bitshifts, large values are
kept intact for clarity.

Signed-off-by: David Sterba <dsterba@suse.cz>
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