[PATCH v17 12/12] null_blk: add support for copy offload

[kernel test robot]

Hi Nitesh,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 213f891525c222e8ed145ce1ce7ae1f47921cb9c]

url:    https://github.com/intel-lab-lkp/linux/commits/Nitesh-Shetty/block-Introduce-queue-limits-and-sysfs-for-copy-offload-support/20231019-200658
base:   213f891525c222e8ed145ce1ce7ae1f47921cb9c
patch link:    https://lore.kernel.org/r/20231019110147.31672-13-nj.shetty%40samsung.com
patch subject: [PATCH v17 12/12] null_blk: add support for copy offload
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20231107/202311070508.mIPbaEHa-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231107/202311070508.mIPbaEHa-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311070508.mIPbaEHa-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/block/null_blk/main.c:15:
   In file included from drivers/block/null_blk/trace.h:104:
   In file included from include/trace/define_trace.h:102:
   In file included from include/trace/trace_events.h:237:
>> drivers/block/null_blk/trace.h:94:34: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat]
                             __entry->dst, __entry->src, __entry->len)
                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
   include/trace/stages/stage3_trace_output.h:6:17: note: expanded from macro '__entry'
   #define __entry field
                   ^
   include/trace/stages/stage3_trace_output.h:9:43: note: expanded from macro 'TP_printk'
   #define TP_printk(fmt, args...) fmt "\n", args
                                   ~~~       ^
   include/trace/trace_events.h:45:16: note: expanded from macro 'TRACE_EVENT'
                                PARAMS(print));                   \
                                ~~~~~~~^~~~~~~
   include/linux/tracepoint.h:107:25: note: expanded from macro 'PARAMS'
   #define PARAMS(args...) args
                           ^~~~
   include/trace/trace_events.h:203:27: note: expanded from macro 'DECLARE_EVENT_CLASS'
           trace_event_printf(iter, print);                                \
                                    ^~~~~
   1 warning generated.


vim +94 drivers/block/null_blk/trace.h

    72	
    73	TRACE_EVENT(nullb_copy_op,
    74			TP_PROTO(struct request *req,
    75				 sector_t dst, sector_t src, size_t len),
    76			TP_ARGS(req, dst, src, len),
    77			TP_STRUCT__entry(
    78					 __array(char, disk, DISK_NAME_LEN)
    79					 __field(enum req_op, op)
    80					 __field(sector_t, dst)
    81					 __field(sector_t, src)
    82					 __field(size_t, len)
    83			),
    84			TP_fast_assign(
    85				       __entry->op = req_op(req);
    86				       __assign_disk_name(__entry->disk, req->q->disk);
    87				       __entry->dst = dst;
    88				       __entry->src = src;
    89				       __entry->len = len;
    90			),
    91			TP_printk("%s req=%-15s: dst=%llu, src=%llu, len=%lu",
    92				  __print_disk_name(__entry->disk),
    93				  blk_op_str(__entry->op),
  > 94				  __entry->dst, __entry->src, __entry->len)
    95	);
    96	#endif /* _TRACE_NULLB_H */
    97	

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