extent_mergeable 1215 fs/btrfs/file.c if (extent_mergeable(leaf, path->slots[0] - 1, extent_mergeable 1242 fs/btrfs/file.c if (extent_mergeable(leaf, path->slots[0] + 1, extent_mergeable 1328 fs/btrfs/file.c if (extent_mergeable(leaf, path->slots[0] + 1, extent_mergeable 1346 fs/btrfs/file.c if (extent_mergeable(leaf, path->slots[0] - 1,