Re: [PATCH 4/9] perf/arm_dsu: Avoid explicit cpumask var allocation from stack

From: kernel test robot <lkp@intel.com>
To: Dawei Li <dawei.li@shingroup.cn>, will@kernel.org, mark.rutland@arm.com
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	xueshuai@linux.alibaba.com, renyu.zj@linux.alibaba.com,
	yangyicong@hisilicon.com, jonathan.cameron@huawei.com,
	andersson@kernel.org, konrad.dybcio@linaro.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	Dawei Li <dawei.li@shingroup.cn>
Subject: Re: [PATCH 4/9] perf/arm_dsu: Avoid explicit cpumask var allocation from stack
Date: Wed, 3 Apr 2024 09:43:08 +0800	[thread overview]
Message-ID: <202404030906.L4BhRzHw-lkp@intel.com> (raw)
In-Reply-To: <20240402105610.1695644-5-dawei.li@shingroup.cn>

Hi Dawei,

kernel test robot noticed the following build errors:

[auto build test ERROR on soc/for-next]
[also build test ERROR on linus/master v6.9-rc2 next-20240402]
[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/Dawei-Li/perf-alibaba_uncore_drw-Avoid-explicit-cpumask-var-allocation-from-stack/20240402-192244
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
patch link:    https://lore.kernel.org/r/20240402105610.1695644-5-dawei.li%40shingroup.cn
patch subject: [PATCH 4/9] perf/arm_dsu: Avoid explicit cpumask var allocation from stack
config: arm64-randconfig-001-20240403 (https://download.01.org/0day-ci/archive/20240403/202404030906.L4BhRzHw-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240403/202404030906.L4BhRzHw-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/202404030906.L4BhRzHw-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/perf/arm_dsu_pmu.c:243:24: error: incompatible pointer types passing 'cpumask_var_t *' (aka 'struct cpumask **') to parameter of type 'const struct cpumask *'; remove & [-Werror,-Wincompatible-pointer-types]
           ret = cpumask_any_but(&online_supported, cpu);
                                 ^~~~~~~~~~~~~~~~~
   include/linux/cpumask.h:379:52: note: passing argument to parameter 'mask' here
   unsigned int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
                                                      ^
   1 error generated.

vim +243 drivers/perf/arm_dsu_pmu.c

   232	
   233	static unsigned int dsu_pmu_get_online_cpu_any_but(struct dsu_pmu *dsu_pmu, int cpu)
   234	{
   235		cpumask_var_t online_supported;
   236		unsigned int ret;
   237	
   238		if (!alloc_cpumask_var(&online_supported, GFP_KERNEL))
   239			return -ENOMEM;
   240	
   241		cpumask_and(online_supported,
   242			    &dsu_pmu->associated_cpus, cpu_online_mask);
 > 243		ret = cpumask_any_but(&online_supported, cpu);
   244	
   245		free_cpumask_var(online_supported);
   246	
   247		return ret;
   248	}
   249	

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