[dhowells-fs:ceph-iter 87/105] drivers/block/rbd.c:2745:3: warning: needs fixing

[dhowells-fs:ceph-iter 87/105] drivers/block/rbd.c:2745:3: warning: needs fixing

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git ceph-iter
head:   2cf82c6e7baf6d3a2adc0692707028da395f1553
commit: 858dfc3957679d91f48571bff69fa6ea4ecaea2f [87/105] [INCOMPLETE] rbd: Switch from using bvec_iter to iov_iter
config: i386-randconfig-006-20240116 (https://download.01.org/0day-ci/archive/20240117/202401170626.BIWS97iW-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240117/202401170626.BIWS97iW-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401170626.BIWS97iW-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/block/rbd.c:2745:3: warning: needs fixing [-W#warnings]
    2745 |         #warning needs fixing
         |          ^
   1 warning generated.


vim +2745 drivers/block/rbd.c

  2709	
  2710	static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req)
  2711	{
  2712		struct rbd_img_request *img_req = obj_req->img_request;
  2713		struct rbd_device *parent = img_req->rbd_dev->parent;
  2714		struct rbd_img_request *child_img_req;
  2715		int ret;
  2716	
  2717		child_img_req = kmem_cache_alloc(rbd_img_request_cache, GFP_NOIO);
  2718		if (!child_img_req)
  2719			return -ENOMEM;
  2720	
  2721		rbd_img_request_init(child_img_req, parent, OBJ_OP_READ);
  2722		__set_bit(IMG_REQ_CHILD, &child_img_req->flags);
  2723		child_img_req->obj_request = obj_req;
  2724	
  2725		down_read(&parent->header_rwsem);
  2726		rbd_img_capture_header(child_img_req);
  2727		up_read(&parent->header_rwsem);
  2728	
  2729		dout("%s child_img_req %p for obj_req %p\n", __func__, child_img_req,
  2730		     obj_req);
  2731	
  2732	#if 0 //////////////////// TODO
  2733		if (!rbd_img_is_write(img_req)) {
  2734			ret = rbd_img_fill_request(child_img_req,
  2735						   obj_req->img_extents,
  2736						   obj_req->num_img_extents,
  2737						   &obj_req->iter);
  2738		} else {
  2739			ret = rbd_img_fill_request(img_req,
  2740						   obj_req->img_extents,
  2741						   obj_req->num_img_extents,
  2742						   &obj_req->copyup_buf->iter);
  2743		}
  2744	#else
> 2745		#warning needs fixing
  2746		ret = -ENOMEM;
  2747		BUG();
  2748	#endif
  2749		if (ret) {
  2750			rbd_img_request_destroy(child_img_req);
  2751			return ret;
  2752		}
  2753	
  2754		/* avoid parent chain recursion */
  2755		rbd_img_schedule(child_img_req, 0);
  2756		return 0;
  2757	}
  2758	

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