Re: [PATCH v2 4/5] cxl: CXL Performance Monitoring Unit driver

[kernel test robot <lkp@intel.com>]

Hi Jonathan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on acme/perf/core]
[also build test WARNING on tip/perf/core cxl/next cxl/pending linus/master v6.3-rc3 next-20230324]
[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
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jonathan-Cameron/cxl-Add-function-to-count-regblocks-of-a-given-type/20230325-011827
base:   https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf/core
patch link:    https://lore.kernel.org/r/20230324171313.18448-5-Jonathan.Cameron%40huawei.com
patch subject: [PATCH v2 4/5] cxl: CXL Performance Monitoring Unit driver
config: i386-randconfig-a001 (https://download.01.org/0day-ci/archive/20230325/202303250510.RNVcynwI-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/a04f0052a1fa10bda54569c8c7b3ab7fe60ca975
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jonathan-Cameron/cxl-Add-function-to-count-regblocks-of-a-given-type/20230325-011827
        git checkout a04f0052a1fa10bda54569c8c7b3ab7fe60ca975
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/cxl/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303250510.RNVcynwI-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/cxl/cpmu.c: In function 'cpmu_parse_caps':
   drivers/cxl/cpmu.c:101:15: error: implicit declaration of function 'readq'; did you mean 'readl'? [-Werror=implicit-function-declaration]
     101 |         val = readq(base + CPMU_CAP_REG);
         |               ^~~~~
         |               readl
   drivers/cxl/cpmu.c: In function 'cpmu_pmu_enable':
   drivers/cxl/cpmu.c:559:17: error: implicit declaration of function 'writeq'; did you mean 'writel'? [-Werror=implicit-function-declaration]
     559 |                 writeq(0, base + CPMU_FREEZE_REG);
         |                 ^~~~~~
         |                 writel
   In file included from include/linux/bitops.h:6,
                    from drivers/cxl/cpmu.c:24:
   drivers/cxl/cpmu.c: In function 'cpmu_pmu_disable':
>> include/linux/bits.h:35:18: warning: right shift count is negative [-Wshift-count-negative]
      35 |          (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
         |                  ^~
   include/linux/bits.h:37:38: note: in expansion of macro '__GENMASK'
      37 |         (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
         |                                      ^~~~~~~~~
   drivers/cxl/cpmu.c:578:24: note: in expansion of macro 'GENMASK'
     578 |                 writeq(GENMASK(63, 0), base + CPMU_FREEZE_REG);
         |                        ^~~~~~~
   cc1: some warnings being treated as errors


vim +35 include/linux/bits.h

295bcca84916cb Rikard Falkeborn 2020-04-06  32  
295bcca84916cb Rikard Falkeborn 2020-04-06  33  #define __GENMASK(h, l) \
95b980d62d52c4 Masahiro Yamada  2019-07-16  34  	(((~UL(0)) - (UL(1) << (l)) + 1) & \
95b980d62d52c4 Masahiro Yamada  2019-07-16 @35  	 (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
295bcca84916cb Rikard Falkeborn 2020-04-06  36  #define GENMASK(h, l) \
295bcca84916cb Rikard Falkeborn 2020-04-06  37  	(GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
8bd9cb51daac89 Will Deacon      2018-06-19  38  

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