From: Jiang Liu <liuj97@gmail.com>
Date: Thu, 6 Jun 2013 16:07:31 +0000 (+0800)
Subject: zram: use atomic64_xxx() to replace zram_stat64_xxx()
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~76^2~221
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=da5cc7d338f97886ebf35be92995460289379b73;p=pandora-kernel.git

zram: use atomic64_xxx() to replace zram_stat64_xxx()

Use atomic64_xxx() to replace open-coded zram_stat64_xxx().
Some architectures have native support of atomic64 operations,
so we can get rid of the spin_lock() in zram_stat64_xxx().
On the other hand, for platforms use generic version of atomic64
implement, it may cause an extra save/restore of the interrupt
flag.  So it's a tradeoff.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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