Re: [RFC V3 1/6] blk: prepare to make blk-rq-qos pluggable and modular

[kernel test robot <lkp@intel.com>]

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Hi "Wang,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on v5.17-rc4]
[also build test WARNING on next-20220216]
[cannot apply to axboe-block/for-next]
[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/Wang-Jianchao-Kuaishou/blk-make-blk-rq-qos-policies-pluggable-and-modular/20220216-195026
base:    754e0b0e35608ed5206d6a67a791563c631cec07
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220216/202202162159.aWo1ROMf-lkp(a)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/e486fdca8e0e257a237ae001ff5759e4a06ae114
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Wang-Jianchao-Kuaishou/blk-make-blk-rq-qos-policies-pluggable-and-modular/20220216-195026
        git checkout e486fdca8e0e257a237ae001ff5759e4a06ae114
        # 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 >>):

>> block/blk-rq-qos.c:516:5: warning: no previous prototype for 'rq_qos_switch' [-Wmissing-prototypes]
     516 | int rq_qos_switch(struct request_queue *q,
         |     ^~~~~~~~~~~~~


vim +/rq_qos_switch +516 block/blk-rq-qos.c

   515	
 > 516	int rq_qos_switch(struct request_queue *q,
   517			const struct rq_qos_ops *ops,
   518			struct rq_qos *rqos)
   519	{
   520		int ret;
   521	
   522		blk_mq_freeze_queue(q);
   523		if (!rqos) {
   524			ret = ops->init(q);
   525		} else {
   526			ops->exit(rqos);
   527			ret = 0;
   528		}
   529		blk_mq_unfreeze_queue(q);
   530	
   531		return ret;
   532	}
   533	

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