bcache: Take data offset from the bdev superblock.
authorKent Overstreet <koverstreet@google.com>
Thu, 11 Apr 2013 22:14:35 +0000 (15:14 -0700)
committerKent Overstreet <koverstreet@google.com>
Sun, 21 Apr 2013 00:56:12 +0000 (17:56 -0700)
Add a new superblock version, and consolidate related defines.

Signed-off-by: Gabriel de Perthuis <g2p.code+bcache@gmail.com>
Signed-off-by: Kent Overstreet <koverstreet@google.com>

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