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

[Yujie Liu]

On Sat, Mar 02, 2024 at 07:38:31AM +0800, 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@xxxxxxxxx/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@xxxxxxxxx/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@xxxxxxxxx>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202403020747.CxX5V2dB-lkp@xxxxxxxxx/
> 
> sparse warnings: (new ones prefixed by >>)

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

arch/x86/kernel/cpu/debugfs.c:11:33: sparse: sparse: incorrect type in initializer (different address spaces)
arch/x86/kernel/cpu/debugfs.c:11:33: sparse:     expected void const [noderef] __percpu *__vpp_verify
arch/x86/kernel/cpu/debugfs.c:11:33: sparse:     got struct cpuinfo_x86 *

> 
> 
> 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);
>     12	
>     13		seq_printf(m, "online:              %d\n", cpu_online(cpu));
>     14		if (!c->initialized)
>     15			return 0;
>     16	
>     17		seq_printf(m, "initial_apicid:      %x\n", c->topo.initial_apicid);
>     18		seq_printf(m, "apicid:              %x\n", c->topo.apicid);
>     19		seq_printf(m, "pkg_id:              %u\n", c->topo.pkg_id);
>     20		seq_printf(m, "die_id:              %u\n", c->topo.die_id);
>     21		seq_printf(m, "cu_id:               %u\n", c->topo.cu_id);
>     22		seq_printf(m, "core_id:             %u\n", c->topo.core_id);
>     23		seq_printf(m, "logical_pkg_id:      %u\n", c->topo.logical_pkg_id);
>     24		seq_printf(m, "logical_die_id:      %u\n", c->topo.logical_die_id);
>     25		seq_printf(m, "llc_id:              %u\n", c->topo.llc_id);
>     26		seq_printf(m, "l2c_id:              %u\n", c->topo.l2c_id);
>     27		seq_printf(m, "max_cores:           %u\n", c->x86_max_cores);
>     28		seq_printf(m, "max_die_per_pkg:     %u\n", __max_die_per_package);
>     29		seq_printf(m, "smp_num_siblings:    %u\n", smp_num_siblings);
>     30		return 0;
>     31	}
>     32	
> 
> -- 
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