From dd1d5afca8d3bda7ff9db773fc08e648d2503dc6 Mon Sep 17 00:00:00 2001
From: William Lee Irwin III <wli@holomorphy.com>
Date: Sun, 1 May 2005 08:58:38 -0700
Subject: [PATCH] [PATCH] sync_page() smp_mb() comment

The smp_mb() is becaus sync_page() doesn't have PG_locked while it accesses
page_mapping(page).  The comments in the patch (the entire patch is the
addition of this comment) try to explain further how and why smp_mb() is
used.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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