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btrfs: reada_extent doesn't need kref for refcount
authorAl Viro <viro@zeniv.linux.org.uk>
Wed, 29 Aug 2012 20:31:33 +0000 (16:31 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 3 Oct 2012 01:35:55 +0000 (21:35 -0400)
All increments and decrements are under the same spinlock - have to be,
since they need to protect the radix_tree it's found in.  Just use
int, no need to wank with kref...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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