xfbtree_alloc_block
int xfbtree_alloc_block(struct xfs_btree_cur *cur,
.alloc_block = xfbtree_alloc_block,
.alloc_block = xfbtree_alloc_block,
.alloc_block = xfbtree_alloc_block,
DEFINE_XFBTREE_FREESP_EVENT(xfbtree_alloc_block);