EXTENT_DIO_LOCKED
unlock_bits |= EXTENT_DIO_LOCKED;
EXTENT_LOCKED | EXTENT_DIO_LOCKED, &cached_state);
return btrfs_lock_extent_bits(tree, start, end, EXTENT_DIO_LOCKED, cached);
return btrfs_try_lock_extent_bits(tree, start, end, EXTENT_DIO_LOCKED, cached);
return btrfs_clear_extent_bit_changeset(tree, start, end, EXTENT_DIO_LOCKED,
#define EXTENT_LOCK_BITS (EXTENT_LOCKED | EXTENT_DIO_LOCKED)