linux-kernel - Re: [PATCH 4/6] x86,tlb: only send page table free TLB flush to lazy TLB CPUs

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Message-ID: <201806270453.Vf1oYmtl%fengguang.wu@intel.com>
Date:   Wed, 27 Jun 2018 04:16:54 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Rik van Riel <riel@...riel.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org, x86@...nel.org,
        luto@...nel.org, dave.hansen@...ux.intel.com, mingo@...nel.org,
        kernel-team@...com, tglx@...utronix.de, efault@....de,
        songliubraving@...com, Rik van Riel <riel@...riel.com>
Subject: Re: [PATCH 4/6] x86,tlb: only send page table free TLB flush to lazy
 TLB CPUs

Hi Rik,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v4.18-rc2 next-20180626]
[cannot apply to tip/x86/core]
[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/Rik-van-Riel/mm-allocate-mm_cpumask-dynamically-based-on-nr_cpu_ids/20180627-021116
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

   arch/x86/mm/tlb.c:39:6: sparse: symbol 'clear_asid_other' was not declared. Should it be static?
>> arch/x86/mm/tlb.c:710:6: sparse: symbol 'mm_fill_lazy_tlb_cpu_mask' was not declared. Should it be static?
   arch/x86/mm/tlb.c:833:15: sparse: expression using sizeof(void)

Please review and possibly fold the followup patch.

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