From f66a49766fdfcb8186056bd44a407594c6a3d5ff Mon Sep 17 00:00:00 2001
From: Eli Billauer <eli.billauer@gmail.com>
Date: Sat, 16 Aug 2014 18:57:57 +0300
Subject: [PATCH] staging: xillybus: Removed mmiowb() before mutex_unlock()

The relevant sequences consist of two I/O memory writes. The second write
depends on the first one. mmiowb() was inserted to make sure that no other
thread inserts a "first write" before the current one finished its second.

As a mutex protects this critical sequence, mmiowb() is unnecessary.

Signed-off-by: Eli Billauer <eli.billauer@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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