linux-kernel - Re: [PATCH v8 07/20] powerpc/mm: add helpers to get/set mm.context->pte

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Date:   Fri, 30 Nov 2018 02:26:45 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     kbuild-all@...org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v8 07/20] powerpc/mm: add helpers to get/set
 mm.context->pte_frag

Hi Christophe,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.20-rc4]
[cannot apply to next-20181129]
[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/Christophe-Leroy/powerpc-book3s32-Remove-CONFIG_BOOKE-dependent-code/20181129-210058
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   In file included from arch/powerpc/include/asm/book3s/64/mmu-hash.h:24:0,
                    from arch/powerpc/include/asm/book3s/64/mmu.h:39,
                    from arch/powerpc/include/asm/mmu.h:328,
                    from arch/powerpc/include/asm/lppaca.h:36,
                    from arch/powerpc/include/asm/paca.h:21,
                    from arch/powerpc/include/asm/hw_irq.h:64,
                    from arch/powerpc/include/asm/irqflags.h:12,
                    from include/linux/irqflags.h:16,
                    from include/linux/spinlock.h:54,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from include/linux/slab.h:15,
                    from include/linux/crypto.h:24,
                    from include/crypto/algapi.h:15,
                    from include/crypto/internal/hash.h:16,
                    from arch/powerpc/crypto/md5-glue.c:15:
>> arch/powerpc/include/asm/book3s/64/pgtable.h:219:21: error: "__pte_frag_nr" is not defined, evaluates to 0 [-Werror=undef]
    #define PTE_FRAG_NR __pte_frag_nr
                        ^
   arch/powerpc/include/asm/pgtable.h:123:5: note: in expansion of macro 'PTE_FRAG_NR'
    #if PTE_FRAG_NR != 1
        ^~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +/__pte_frag_nr +219 arch/powerpc/include/asm/book3s/64/pgtable.h

5ed7ecd0 Aneesh Kumar K.V 2016-04-29  217  
5ed7ecd0 Aneesh Kumar K.V 2016-04-29  218  extern unsigned long __pte_frag_nr;
5ed7ecd0 Aneesh Kumar K.V 2016-04-29 @219  #define PTE_FRAG_NR __pte_frag_nr
5ed7ecd0 Aneesh Kumar K.V 2016-04-29  220  extern unsigned long __pte_frag_size_shift;
5ed7ecd0 Aneesh Kumar K.V 2016-04-29  221  #define PTE_FRAG_SIZE_SHIFT __pte_frag_size_shift
5ed7ecd0 Aneesh Kumar K.V 2016-04-29  222  #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
dd1842a2 Aneesh Kumar K.V 2016-04-29  223  

:::::: The code at line 219 was first introduced by commit
:::::: 5ed7ecd08a0807d6d616c3d958402f9c723bb048 powerpc/mm: pte_frag abstraction

:::::: TO: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
:::::: CC: Michael Ellerman <mpe@...erman.id.au>

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