ocfs2_lock_allocators
ret = ocfs2_lock_allocators(inode, &et,
ret = ocfs2_lock_allocators(inode, &et, 0, dwc->dw_zero_count*2,
ret = ocfs2_lock_allocators(dir, &et, 1, 0, &data_ac, &meta_ac);
status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_extent_tree *et,
ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);