tree 6856ad3e5822eacfc2ac94693b6023ef81567fd2
parent 6af118ce51b52ceda357c671550c79628b9c4a65
author Chris Mason <chris.mason@oracle.com> 1216739888 -0400
committer Chris Mason <chris.mason@oracle.com> 1222355045 -0400

Btrfs: Use a mutex in the extent buffer for tree block locking

This replaces the use of the page cache lock bit for locking, which wasn't
suitable for block size < page size and couldn't be used recursively.

The mutexes alone don't fix either problem, but they are the first step.

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