Btrfs: add the ability to cache a pointer into the eb
authorChris Mason <chris.mason@oracle.com>
Sat, 3 Mar 2012 12:40:03 +0000 (07:40 -0500)
committerChris Mason <chris.mason@oracle.com>
Mon, 26 Mar 2012 21:04:23 +0000 (17:04 -0400)
This cuts down on the CPU time used by map_private_extent_buffer

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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