From 038c7aa16a38059ac23dfe9caa6954226ea20728 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 5 Mar 2012 13:25:09 -0500
Subject: [PATCH] VM: unmap_page_range() can return void

return value is always the 4th ('end') argument.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Reading git-format-patch failed