Hi Keith,

I love your patch! Perhaps something to improve:

[auto build test WARNING on axboe-block/for-next]
[also build test WARNING on linux-review/Xie-Yongji/nbd-Don-t-use-workqueue-to-handle-recv-work/20211227-171406 linus/master v5.16-rc7 next-20211224]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Keith-Busch/block-introduce-rq_list_for_each_safe-macro/20211228-004304
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20211228/202112280210.F89j103t-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/81098ed2c64adf477eae9c21a4188916e0ef5918
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Keith-Busch/block-introduce-rq_list_for_each_safe-macro/20211228-004304
        git checkout 81098ed2c64adf477eae9c21a4188916e0ef5918
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from arch/um/drivers/ubd_kern.c:27:
>> include/linux/blk-mq.h:227:1: warning: 'inline' is not at beginning of declaration [-Wold-style-declaration]
     227 | static void inline rq_list_move(struct request **src, struct request **dst,
         | ^~~~~~
--
   In file included from include/linux/blktrace_api.h:5,
                    from block/bfq-iosched.h:9,
                    from block/bfq-cgroup.c:16:
>> include/linux/blk-mq.h:227:1: warning: 'inline' is not at beginning of declaration [-Wold-style-declaration]
     227 | static void inline rq_list_move(struct request **src, struct request **dst,
         | ^~~~~~
   block/bfq-cgroup.c:1437:6: warning: no previous prototype for 'bfqg_and_blkg_get' [-Wmissing-prototypes]
    1437 | void bfqg_and_blkg_get(struct bfq_group *bfqg) {}
         |      ^~~~~~~~~~~~~~~~~


vim +/inline +227 include/linux/blk-mq.h

   215	
   216	#define rq_dma_dir(rq) \
   217		(op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
   218	
   219	/**
   220	 * rq_list_move() - move a struct request from one list to another
   221	 * @src: The source list @rq is currently in
   222	 * @dst: The destination list that @rq will be appended to
   223	 * @rq: The request to move
   224	 * @prv: The request preceding @rq in @src (NULL if @rq is the head)
   225	 * @nxt: The request following @rq in @src (NULL if @rq is the tail)
   226	 */
 > 227	static void inline rq_list_move(struct request **src, struct request **dst,
   228					struct request *rq, struct request *prv,
   229					struct request *nxt)
   230	{
   231		if (prv)
   232			prv->rq_next = nxt;
   233		else
   234			*src = nxt;
   235		rq_list_add(dst, rq);
   236	}
   237	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org