Btrfs end_bio_extent_readpage should look for locked bits
A recent commit caches the extent state in end_bio_extent_readpage,
but the search it does should look for locked extents. This
fixes things to make it more effective.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 1c462f89..5ae0bff 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1761,7 +1761,7 @@
prefetchw(&bvec->bv_page->flags);
spin_lock(&tree->lock);
- state = find_first_extent_bit_state(tree, start, 0);
+ state = find_first_extent_bit_state(tree, start, EXTENT_LOCKED);
if (state && state->start == start) {
/*
* take a reference on the state, unlock will drop