From 7ac9fb9c2a50963b699b3548e6f00698c1554dc6 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@tuxera.com>
Date: Fri, 1 Oct 2010 05:45:08 +0200
Subject: [PATCH] hfsplus: add per-superblock lock for volume header updates

Lock updates to the mutal fields in the volume header, and document the
locing in the hfsplus_sb_info structure.

Signed-off-by: Christoph Hellwig <hch@tuxera.com>
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