btrfs: reada_extent doesn't need kref for refcount
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>
parent
10c28d93
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