linux-kernel - Re: [PATCH 2/4] x86/apic: record capped cpu in generic_processor

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Date:   Thu, 8 Aug 2019 08:17:43 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Pingfan Liu <kernelfans@...il.com>
Cc:     kbuild-all@...org, Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>, x86@...nel.org,
        Pingfan Liu <kernelfans@...il.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Masami Hiramatsu <mhiramat@...nel.org>, Qian Cai <cai@....pw>,
        Vlastimil Babka <vbabka@...e.cz>,
        Daniel Drake <drake@...lessm.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org, Dave Young <dyoung@...hat.com>,
        Baoquan He <bhe@...hat.com>, kexec@...ts.infradead.org
Subject: Re: [PATCH 2/4] x86/apic: record capped cpu in
 generic_processor_info()

Hi Pingfan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[cannot apply to v5.3-rc3 next-20190807]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Pingfan-Liu/x86-mce-protect-nr_cpus-from-rebooting-by-broadcast-mce/20190806-101748
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-rc1-7-g2b96cd8-dirty
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)

>> arch/x86/kernel/cpu/common.c:70:16: sparse: sparse: symbol '__cpu_capped_mask' was not declared. Should it be static?
   arch/x86/kernel/cpu/common.c:135:43: sparse: sparse: cast truncates bits from constant value (fffff becomes ffff)
   arch/x86/kernel/cpu/common.c:136:43: sparse: sparse: cast truncates bits from constant value (fffff becomes ffff)
   arch/x86/kernel/cpu/common.c:137:43: sparse: sparse: cast truncates bits from constant value (fffff becomes ffff)
   arch/x86/kernel/cpu/common.c:138:43: sparse: sparse: cast truncates bits from constant value (fffff becomes ffff)
   arch/x86/kernel/cpu/common.c:165:43: sparse: sparse: cast truncates bits from constant value (fffff becomes ffff)
   arch/x86/kernel/cpu/common.c:166:43: sparse: sparse: cast truncates bits from constant value (fffff becomes ffff)

Please review and possibly fold the followup patch.

---
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