From: Seth Jennings <sjenning@linux.vnet.ibm.com>
Date: Fri, 30 Dec 2011 16:42:15 +0000 (-0600)
Subject: staging: zcache: fix serialization bug in zv stats
X-Git-Tag: v3.3-rc4~40^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a4830110b90deb4ee99b1ab8c8ebb120f27c0c8;p=pandora-kernel.git

staging: zcache: fix serialization bug in zv stats

In a multithreaded workload, the zv_curr_dist_counts
and zv_cumul_dist_counts statistics are being corrupted
because the increments and decrements in zv_create
and zv_free are not atomic.

This patch converts these statistics and their corresponding
increments/decrements/reads to atomic operations.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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