btrfs_lock_extent_bits
int btrfs_lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, u32 bits,
return btrfs_lock_extent_bits(tree, start, end, EXTENT_LOCKED, cached);
return btrfs_lock_extent_bits(tree, start, end, EXTENT_DIO_LOCKED, cached);
btrfs_lock_extent_bits(io_tree, start, end,