linux-kernel - [jpirko-mlxsw:petrm_soft_counters 9/10] include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size

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Date:   Fri, 10 Dec 2021 16:11:46 +0800
From:   kernel test robot <lkp@...el.com>
To:     Petr Machata <petrm@...dia.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [jpirko-mlxsw:petrm_soft_counters 9/10]
 include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of
 type 'long int', but argument 2 has type 'size_t' {aka 'unsigned int'}

tree:   https://github.com/jpirko/linux_mlxsw petrm_soft_counters
head:   38ca0aa04554a994a5ab769f0c07b37484b5f4c9
commit: 0839ffb5b56fb6f5e67545c77bf6151fe606835d [9/10] wip
config: arc-randconfig-r043-20211210 (https://download.01.org/0day-ci/archive/20211210/202112101613.n18YqogN-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/jpirko/linux_mlxsw/commit/0839ffb5b56fb6f5e67545c77bf6151fe606835d
        git remote add jpirko-mlxsw https://github.com/jpirko/linux_mlxsw
        git fetch --no-tags jpirko-mlxsw petrm_soft_counters
        git checkout 0839ffb5b56fb6f5e67545c77bf6151fe606835d
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash net/core/

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/kernel.h:19,
                    from include/linux/list.h:9,
                    from include/linux/module.h:12,
                    from net/core/rtnetlink.c:17:
   net/core/rtnetlink.c: In function 'if_nlmsg_stats_size':
>> include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
       5 | #define KERN_SOH        "\001"          /* ASCII Start Of Header */
         |                         ^~~~~~
   include/linux/printk.h:418:25: note: in definition of macro 'printk_index_wrap'
     418 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                         ^~~~
   net/core/rtnetlink.c:5509:9: note: in expansion of macro 'printk'
    5509 |         printk(KERN_WARNING "if_nlmsg_stats_size %ld\n", size);
         |         ^~~~~~
   include/linux/kern_levels.h:12:25: note: in expansion of macro 'KERN_SOH'
      12 | #define KERN_WARNING    KERN_SOH "4"    /* warning conditions */
         |                         ^~~~~~~~
   net/core/rtnetlink.c:5509:16: note: in expansion of macro 'KERN_WARNING'
    5509 |         printk(KERN_WARNING "if_nlmsg_stats_size %ld\n", size);
         |                ^~~~~~~~~~~~


vim +5 include/linux/kern_levels.h

314ba3520e513a7 Joe Perches 2012-07-30  4  
04d2c8c83d0e3ac Joe Perches 2012-07-30 @5  #define KERN_SOH	"\001"		/* ASCII Start Of Header */
04d2c8c83d0e3ac Joe Perches 2012-07-30  6  #define KERN_SOH_ASCII	'\001'
04d2c8c83d0e3ac Joe Perches 2012-07-30  7  

:::::: The code at line 5 was first introduced by commit
:::::: 04d2c8c83d0e3ac5f78aeede51babb3236200112 printk: convert the format for KERN_<LEVEL> to a 2 byte pattern

:::::: TO: Joe Perches <joe@...ches.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

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