Re: [RFC 2/6] mmc: core: Add core scaling support in driver

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

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Hi Ram,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on linus/master]
[cannot apply to v5.4-rc4 next-20191023]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Ram-Prakash-Gupta/mmc-Add-clock-scaling-support-for-mmc-driver/20191024-121237
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 13b86bc4cd648eae69fdcf3d04b2750c76350053
config: x86_64-randconfig-f003-201942 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from drivers/mmc/core/queue.h:7:0,
                    from drivers/mmc/core/core.c:43:
   include/linux/blk-mq.h: In function 'blk_mq_rq_from_pdu':
>> include/linux/blk-mq.h:352:22: error: invalid application of 'sizeof' to incomplete type 'struct request'
     return pdu - sizeof(struct request);
                         ^~~~~~
   include/linux/blk-mq.h: In function 'blk_mq_rq_to_pdu':
>> include/linux/blk-mq.h:356:12: error: invalid use of undefined type 'struct request'
     return rq + 1;
               ^
   In file included from include/linux/export.h:44:0,
                    from include/linux/linkage.h:7,
                    from include/linux/kernel.h:8,
                    from include/linux/list.h:9,
                    from include/linux/module.h:9,
                    from drivers/mmc/core/core.c:10:
   include/linux/blk-mq.h: In function 'request_to_qc_t':
>> include/linux/blk-mq.h:370:8: error: dereferencing pointer to incomplete type 'struct request'
     if (rq->tag != -1)
           ^
   include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var'
    #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                       ^~~~
   include/linux/blk-mq.h:370:2: note: in expansion of macro 'if'
     if (rq->tag != -1)
     ^~
   At top level:
   drivers/mmc/core/core.c:114:13: warning: 'mmc_is_data_request' defined but not used [-Wunused-function]
    static bool mmc_is_data_request(struct mmc_request *mmc_request)
                ^~~~~~~~~~~~~~~~~~~
--
   In file included from drivers/mmc//core/queue.h:7:0,
                    from drivers/mmc//core/core.c:43:
   include/linux/blk-mq.h: In function 'blk_mq_rq_from_pdu':
>> include/linux/blk-mq.h:352:22: error: invalid application of 'sizeof' to incomplete type 'struct request'
     return pdu - sizeof(struct request);
                         ^~~~~~
   include/linux/blk-mq.h: In function 'blk_mq_rq_to_pdu':
>> include/linux/blk-mq.h:356:12: error: invalid use of undefined type 'struct request'
     return rq + 1;
               ^
   In file included from include/linux/export.h:44:0,
                    from include/linux/linkage.h:7,
                    from include/linux/kernel.h:8,
                    from include/linux/list.h:9,
                    from include/linux/module.h:9,
                    from drivers/mmc//core/core.c:10:
   include/linux/blk-mq.h: In function 'request_to_qc_t':
>> include/linux/blk-mq.h:370:8: error: dereferencing pointer to incomplete type 'struct request'
     if (rq->tag != -1)
           ^
   include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var'
    #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                       ^~~~
   include/linux/blk-mq.h:370:2: note: in expansion of macro 'if'
     if (rq->tag != -1)
     ^~
   At top level:
   drivers/mmc//core/core.c:114:13: warning: 'mmc_is_data_request' defined but not used [-Wunused-function]
    static bool mmc_is_data_request(struct mmc_request *mmc_request)
                ^~~~~~~~~~~~~~~~~~~

vim +352 include/linux/blk-mq.h

9cf2bab6307659 Jens Axboe    2018-10-31  345  
320ae51feed5c2 Jens Axboe    2013-10-24  346  /*
320ae51feed5c2 Jens Axboe    2013-10-24  347   * Driver command data is immediately after the request. So subtract request
2963e3f7e8e346 Jens Axboe    2015-04-09  348   * size to get back to the original request, add request size to get the PDU.
320ae51feed5c2 Jens Axboe    2013-10-24  349   */
320ae51feed5c2 Jens Axboe    2013-10-24  350  static inline struct request *blk_mq_rq_from_pdu(void *pdu)
320ae51feed5c2 Jens Axboe    2013-10-24  351  {
320ae51feed5c2 Jens Axboe    2013-10-24 @352  	return pdu - sizeof(struct request);
320ae51feed5c2 Jens Axboe    2013-10-24  353  }
320ae51feed5c2 Jens Axboe    2013-10-24  354  static inline void *blk_mq_rq_to_pdu(struct request *rq)
320ae51feed5c2 Jens Axboe    2013-10-24  355  {
2963e3f7e8e346 Jens Axboe    2015-04-09 @356  	return rq + 1;
320ae51feed5c2 Jens Axboe    2013-10-24  357  }
320ae51feed5c2 Jens Axboe    2013-10-24  358  
320ae51feed5c2 Jens Axboe    2013-10-24  359  #define queue_for_each_hw_ctx(q, hctx, i)				\
0d0b7d427987f6 Jose Alonso   2014-01-28  360  	for ((i) = 0; (i) < (q)->nr_hw_queues &&			\
0d0b7d427987f6 Jose Alonso   2014-01-28  361  	     ({ hctx = (q)->queue_hw_ctx[i]; 1; }); (i)++)
320ae51feed5c2 Jens Axboe    2013-10-24  362  
320ae51feed5c2 Jens Axboe    2013-10-24  363  #define hctx_for_each_ctx(hctx, ctx, i)					\
0d0b7d427987f6 Jose Alonso   2014-01-28  364  	for ((i) = 0; (i) < (hctx)->nr_ctx &&				\
0d0b7d427987f6 Jose Alonso   2014-01-28  365  	     ({ ctx = (hctx)->ctxs[(i)]; 1; }); (i)++)
320ae51feed5c2 Jens Axboe    2013-10-24  366  
7b7ab780a04869 Sagi Grimberg 2018-12-14  367  static inline blk_qc_t request_to_qc_t(struct blk_mq_hw_ctx *hctx,
7b7ab780a04869 Sagi Grimberg 2018-12-14  368  		struct request *rq)
7b7ab780a04869 Sagi Grimberg 2018-12-14  369  {
7b7ab780a04869 Sagi Grimberg 2018-12-14 @370  	if (rq->tag != -1)
7b7ab780a04869 Sagi Grimberg 2018-12-14  371  		return rq->tag | (hctx->queue_num << BLK_QC_T_SHIFT);
7b7ab780a04869 Sagi Grimberg 2018-12-14  372  
7b7ab780a04869 Sagi Grimberg 2018-12-14  373  	return rq->internal_tag | (hctx->queue_num << BLK_QC_T_SHIFT) |
7b7ab780a04869 Sagi Grimberg 2018-12-14  374  			BLK_QC_T_INTERNAL;
7b7ab780a04869 Sagi Grimberg 2018-12-14  375  }
7b7ab780a04869 Sagi Grimberg 2018-12-14  376  

:::::: The code@line 352 was first introduced by commit
:::::: 320ae51feed5c2f13664aa05a76bec198967e04d blk-mq: new multi-queue block IO queueing mechanism

:::::: TO: Jens Axboe <axboe@kernel.dk>
:::::: CC: Jens Axboe <axboe@kernel.dk>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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