linux-kernel - Re: arch/x86/kernel/cpu/debugfs.c:11:33: sparse: sparse: incorrect type in initializer (different address spaces)

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Date: Sat, 02 Mar 2024 00:49:18 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: kernel test robot <lkp@...el.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: arch/x86/kernel/cpu/debugfs.c:11:33: sparse: sparse: incorrect
 type in initializer (different address spaces)

On Sat, Mar 02 2024 at 07:38, kernel test robot wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   d17468c6f1f49e6259698f6401b8d7a5b90eac68
> commit: 48525fd1ea1cfa059a580e77b10ea8790914efa2 x86/cpu: Provide debug interface
> date:   5 months ago
> config: x86_64-randconfig-121-20240301 (https://download.01.org/0day-ci/archive/20240302/202403020747.CxX5V2dB-lkp@intel.com/config)
> compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240302/202403020747.CxX5V2dB-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/202403020747.CxX5V2dB-lkp@intel.com/
>
> sparse warnings: (new ones prefixed by >>)
>
>
> vim +11 arch/x86/kernel/cpu/debugfs.c
>
>      7	
>      8	static int cpu_debug_show(struct seq_file *m, void *p)
>      9	{
>     10		unsigned long cpu = (unsigned long)m->private;
>   > 11		struct cpuinfo_x86 *c = per_cpu_ptr(&cpu_info, cpu);

This is the line which allegdly causes that new bogus warning, but your
report does not include the warning itself. How useful...

Though don't bother to send me the warning. It's going to be completely
bogus anyway as all the other ones.

Thanks,

        tglx