[rw-misc:embedded_go_prog 1/1] include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'ssize_t' {aka 'int'}

[rw-misc:embedded_go_prog 1/1] include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'ssize_t' {aka 'int'}

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rw/misc.git embedded_go_prog
head:   58a51666e0ed2b23253048b0616ee5879361cc4a
commit: 58a51666e0ed2b23253048b0616ee5879361cc4a [1/1] misc: Add demo driver for user mode driver usage
config: openrisc-randconfig-r024-20230717 (https://download.01.org/0day-ci/archive/20230718/202307180629.FjoLoRM8-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230718/202307180629.FjoLoRM8-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307180629.FjoLoRM8-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/asm-generic/bug.h:22,
                    from ./arch/openrisc/include/generated/asm/bug.h:1,
                    from include/linux/bug.h:5,
                    from include/linux/thread_info.h:13,
                    from include/asm-generic/current.h:5,
                    from ./arch/openrisc/include/generated/asm/current.h:1,
                    from include/linux/sched.h:12,
                    from include/linux/freezer.h:8,
                    from drivers/misc/embedded_prog/eprog_kern.c:2:
   drivers/misc/embedded_prog/eprog_kern.c: In function 'eprog_thread':
>> include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'ssize_t' {aka 'int'} [-Wformat=]
       5 | #define KERN_SOH        "\001"          /* ASCII Start Of Header */
         |                         ^~~~~~
   include/linux/printk.h:427:25: note: in definition of macro 'printk_index_wrap'
     427 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                         ^~~~
   include/linux/printk.h:498:9: note: in expansion of macro 'printk'
     498 |         printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~
   include/linux/kern_levels.h:11:25: note: in expansion of macro 'KERN_SOH'
      11 | #define KERN_ERR        KERN_SOH "3"    /* error conditions */
         |                         ^~~~~~~~
   include/linux/printk.h:498:16: note: in expansion of macro 'KERN_ERR'
     498 |         printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         |                ^~~~~~~~
   drivers/misc/embedded_prog/eprog_kern.c:46:25: note: in expansion of macro 'pr_err'
      46 |                         pr_err("Fatal error while reading from userspace: %ld\n", nread);
         |                         ^~~~~~


vim +5 include/linux/kern_levels.h

314ba3520e513a Joe Perches 2012-07-30  4  
04d2c8c83d0e3a Joe Perches 2012-07-30 @5  #define KERN_SOH	"\001"		/* ASCII Start Of Header */
04d2c8c83d0e3a Joe Perches 2012-07-30  6  #define KERN_SOH_ASCII	'\001'
04d2c8c83d0e3a 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@perches.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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