[PATCH v2 1/7] iommu/io-pgtable: Introduce dynamic io-pgtable fmt registration

kernel test robot lkp at intel.com
Wed Dec 23 14:17:36 EST 2020

Hi "Isaac,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on iommu/next]
[also build test WARNING on soc/for-next xlnx/master linus/master v5.10 next-20201223]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in

url:    https://github.com/0day-ci/linux/commits/Isaac-J-Manjarres/iommu-Permit-modular-builds-of-io-pgtable-drivers/20201222-085121
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: alpha-randconfig-r023-20201221 (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
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://github.com/0day-ci/linux/commit/9cc3cfc5f79e5c9072aea2218dd9080227933caa
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Isaac-J-Manjarres/iommu-Permit-modular-builds-of-io-pgtable-drivers/20201222-085121
        git checkout 9cc3cfc5f79e5c9072aea2218dd9080227933caa
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:16,
                    from include/asm-generic/bug.h:20,
                    from arch/alpha/include/asm/bug.h:23,
                    from include/linux/bug.h:5,
                    from include/linux/scatterlist.h:7,
                    from include/linux/iommu.h:10,
                    from include/linux/io-pgtable.h:6,
                    from drivers/iommu/io-pgtable-arm.c:14:
   drivers/iommu/io-pgtable-arm.c: In function 'arm_lpae_init':
>> include/linux/kern_levels.h:5:18: warning: format '%d' expects a matching 'int' argument [-Wformat=]
       5 | #define KERN_SOH "\001"  /* ASCII Start Of Header */
         |                  ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
      11 | #define KERN_ERR KERN_SOH "3" /* error conditions */
         |                  ^~~~~~~~
   include/linux/printk.h:343:9: note: in expansion of macro 'KERN_ERR'
     343 |  printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~~~
   drivers/iommu/io-pgtable-arm.c:1257:4: note: in expansion of macro 'pr_err'
    1257 |    pr_err("Failed to register ARM LPAE fmt: %d\n");
         |    ^~~~~~
   drivers/iommu/io-pgtable-arm.c:1257:46: note: format string is defined here
    1257 |    pr_err("Failed to register ARM LPAE fmt: %d\n");
         |                                             ~^
         |                                              |
         |                                              int

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  

0-DAY CI Kernel Test Service, Intel Corporation
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