Btrfs: fix raid10 reading math
authorChris Mason <chris.mason@oracle.com>
Thu, 3 Nov 2011 16:17:49 +0000 (12:17 -0400)
committerChris Mason <chris.mason@oracle.com>
Thu, 3 Nov 2011 16:17:49 +0000 (12:17 -0400)
The btrfs-progs raid10 code has been silently reading the wrong
raid10 block forever.  We didn't notice because it was always fixed
up by the retry code.

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

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