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SubjectRe: [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]

base: next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
wget -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 <>
:::::: CC: Michael Ellerman <>

0-DAY kernel test infrastructure Open Source Technology Center Intel Corporation
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