linux-kernel - [arm-integrator:kernel-in-vmalloc-v5.14-rc1 9/9] include/linux/kern_levels.h:5:18: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'char *'

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Message-ID: <202108071126.RVBbbFjF-lkp@intel.com>
Date:   Sat, 7 Aug 2021 11:09:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [arm-integrator:kernel-in-vmalloc-v5.14-rc1 9/9]
 include/linux/kern_levels.h:5:18: warning: format '%lx' expects argument of
 type 'long unsigned int', but argument 2 has type 'char *'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git kernel-in-vmalloc-v5.14-rc1
head:   7c9dd64f2a22ee380da41e511593de3bc5c67f30
commit: 7c9dd64f2a22ee380da41e511593de3bc5c67f30 [9/9] compile fix
config: arm-am200epdkit_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git/commit/?id=7c9dd64f2a22ee380da41e511593de3bc5c67f30
        git remote add arm-integrator https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git
        git fetch --no-tags arm-integrator kernel-in-vmalloc-v5.14-rc1
        git checkout 7c9dd64f2a22ee380da41e511593de3bc5c67f30
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm 

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 >>):

   arch/arm/mm/init.c:97:13: warning: no previous prototype for 'setup_dma_zone' [-Wmissing-prototypes]
      97 | void __init setup_dma_zone(const struct machine_desc *mdesc)
         |             ^~~~~~~~~~~~~~
   arch/arm/mm/init.c:318:13: warning: no previous prototype for 'mem_init_print_arm_info' [-Wmissing-prototypes]
     318 | void __init mem_init_print_arm_info(void)
         |             ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:19,
                    from arch/arm/mm/init.c:7:
   arch/arm/mm/init.c: In function 'mem_init_print_arm_info':
>> include/linux/kern_levels.h:5:18: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'char *' [-Wformat=]
       5 | #define KERN_SOH "\001"  /* ASCII Start Of Header */
         |                  ^~~~~~
   include/linux/kern_levels.h:13:21: note: in expansion of macro 'KERN_SOH'
      13 | #define KERN_NOTICE KERN_SOH "5" /* normal but significant condition */
         |                     ^~~~~~~~
   include/linux/printk.h:410:9: note: in expansion of macro 'KERN_NOTICE'
     410 |  printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~~~~~~
   arch/arm/mm/init.c:321:2: note: in expansion of macro 'pr_notice'
     321 |  pr_notice("Virtual kernel memory layout:\n"
         |  ^~~~~~~~~
>> include/linux/kern_levels.h:5:18: warning: too many arguments for format [-Wformat-extra-args]
       5 | #define KERN_SOH "\001"  /* ASCII Start Of Header */
         |                  ^~~~~~
   include/linux/kern_levels.h:13:21: note: in expansion of macro 'KERN_SOH'
      13 | #define KERN_NOTICE KERN_SOH "5" /* normal but significant condition */
         |                     ^~~~~~~~
   include/linux/printk.h:410:9: note: in expansion of macro 'KERN_NOTICE'
     410 |  printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~~~~~~
   arch/arm/mm/init.c:321:2: note: in expansion of macro 'pr_notice'
     321 |  pr_notice("Virtual kernel memory layout:\n"
         |  ^~~~~~~~~


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@...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

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