hfsplus: add per-superblock lock for volume header updates
authorChristoph Hellwig <hch@tuxera.com>
Fri, 1 Oct 2010 03:45:08 +0000 (05:45 +0200)
committerChristoph Hellwig <hch@lst.de>
Fri, 1 Oct 2010 03:45:08 +0000 (05:45 +0200)
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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