linux-kernel - [tip:perf/core 12/12] arch/x86/events/rapl.c:154:9: error: returning 'const struct cpumask *' from a function with result type 'cpumask_t *' (aka 'struct cpumask *') discards qualifiers

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Date: Fri, 3 May 2024 08:38:41 +0800
From: kernel test robot <lkp@...el.com>
To: Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Ingo Molnar <mingo@...nel.org>
Subject: [tip:perf/core 12/12] arch/x86/events/rapl.c:154:9: error: returning
 'const struct cpumask *' from a function with result type 'cpumask_t *' (aka
 'struct cpumask *') discards qualifiers

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core
head:   5d4d0283c0546559600dee7e9a4d87e402f3f4d9
commit: 5d4d0283c0546559600dee7e9a4d87e402f3f4d9 [12/12] perf/x86/rapl: Fix the energy-pkg event for AMD CPUs
config: i386-buildonly-randconfig-001-20240503 (https://download.01.org/0day-ci/archive/20240503/202405030828.RgFuznL9-lkp@intel.com/config)
compiler: clang version 18.1.4 (https://github.com/llvm/llvm-project e6c3289804a67ea0bb6a86fadbe454dd93b8d855)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240503/202405030828.RgFuznL9-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405030828.RgFuznL9-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/x86/events/rapl.c:154:9: error: returning 'const struct cpumask *' from a function with result type 'cpumask_t *' (aka 'struct cpumask *') discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
     154 |         return rapl_pmu_is_pkg_scope() ? topology_core_cpumask(cpu) :
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     155 |                                          topology_die_cpumask(cpu);
         |                                          ~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/x86/events/rapl.c:106:2: note: expanded from macro 'rapl_pmu_is_pkg_scope'
     106 |         (boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||  \
         |         ^
   1 error generated.


vim +154 arch/x86/events/rapl.c

   151	
   152	static inline cpumask_t *get_rapl_pmu_cpumask(int cpu)
   153	{
 > 154		return rapl_pmu_is_pkg_scope() ? topology_core_cpumask(cpu) :
   155						 topology_die_cpumask(cpu);
   156	}
   157	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki