linux-kernel - Re: arch/x86/events/amd/uncore.c:601:10: sparse: sparse: incorrect type in initializer (different address spaces)

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Date: Sat, 2 Mar 2024 21:10:30 +0800
From: Yujie Liu <yujie.liu@...el.com>
To: kernel test robot <lkp@...el.com>
CC: Sandipan Das <sandipan.das@....com>, <oe-kbuild-all@...ts.linux.dev>,
	<linux-kernel@...r.kernel.org>, Peter Zijlstra <peterz@...radead.org>
Subject: Re: arch/x86/events/amd/uncore.c:601:10: sparse: sparse: incorrect
 type in initializer (different address spaces)

On Sat, Mar 02, 2024 at 09:32:05AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   d17468c6f1f49e6259698f6401b8d7a5b90eac68
> commit: 07888daa056e809de0b6b234116b575c11f9f99d perf/x86/amd/uncore: Move discovery and registration
> date:   5 months ago
> config: x86_64-randconfig-r122-20240301 (https://download.01.org/0day-ci/archive/20240302/202403020941.UCnNA0rh-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240302/202403020941.UCnNA0rh-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/202403020941.UCnNA0rh-lkp@intel.com/
> 
> sparse warnings: (new ones prefixed by >>)

Sorry for the empty warning here. The actual sparse warning is:

arch/x86/events/amd/uncore.c:601:10: sparse: sparse: incorrect type in initializer (different address spaces)
arch/x86/events/amd/uncore.c:601:10: sparse:     expected void const [noderef] __percpu *__vpp_verify
arch/x86/events/amd/uncore.c:601:10: sparse:     got union amd_uncore_info *

> 
> 
> vim +601 arch/x86/events/amd/uncore.c
> 
>    582	
>    583	static
>    584	void amd_uncore_df_ctx_scan(struct amd_uncore *uncore, unsigned int cpu)
>    585	{
>    586		union cpuid_0x80000022_ebx ebx;
>    587		union amd_uncore_info info;
>    588	
>    589		if (!boot_cpu_has(X86_FEATURE_PERFCTR_NB))
>    590			return;
>    591	
>    592		info.split.aux_data = 0;
>    593		info.split.num_pmcs = NUM_COUNTERS_NB;
>    594		info.split.cid = topology_die_id(cpu);
>    595	
>    596		if (pmu_version >= 2) {
>    597			ebx.full = cpuid_ebx(EXT_PERFMON_DEBUG_FEATURES);
>    598			info.split.num_pmcs = ebx.split.num_df_pmc;
>    599		}
>    600	
>  > 601		*per_cpu_ptr(uncore->info, cpu) = info;
>    602	}
>    603	
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>