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From: Anshuman Khandual <anshuman.khandual@arm.com>
To: kbuild test robot <lkp@intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
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	"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH V13] mm/debug: Add tests validating architecture page table helpers
Date: Thu, 6 Feb 2020 13:49:35 +0530	[thread overview]
Message-ID: <78d3ce6b-e100-2561-6b09-124c29731d1a@arm.com> (raw)
In-Reply-To: <202002060619.wEOdAZU1%lkp@intel.com>


On 02/06/2020 04:40 AM, kbuild test robot wrote:
> Hi Anshuman,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on powerpc/next]
> [also build test ERROR on s390/features linus/master arc/for-next v5.5]
> [cannot apply to mmotm/master tip/x86/core arm64/for-next/core next-20200205]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
> 
> url:    https://github.com/0day-ci/linux/commits/Anshuman-Khandual/mm-debug-Add-tests-validating-architecture-page-table-helpers/20200205-215507
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
> config: ia64-allmodconfig (attached as .config)
> compiler: ia64-linux-gcc (GCC) 7.5.0
> 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=7.5.0 make.cross ARCH=ia64 
> 
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
> 
> All error/warnings (new ones prefixed by >>):
> 
>    In file included from include/asm-generic/pgtable-nopud.h:8:0,
>                     from arch/ia64/include/asm/pgtable.h:586,
>                     from include/linux/mm.h:99,
>                     from include/linux/highmem.h:8,
>                     from mm/debug_vm_pgtable.c:14:
>    mm/debug_vm_pgtable.c: In function 'pud_clear_tests':
>>> include/asm-generic/pgtable-nop4d-hack.h:47:32: error: implicit declaration of function '__pgd'; did you mean '__p4d'? [-Werror=implicit-function-declaration]
>     #define __pud(x)    ((pud_t) { __pgd(x) })
>                                    ^
>>> mm/debug_vm_pgtable.c:141:8: note: in expansion of macro '__pud'
>      pud = __pud(pud_val(pud) | RANDOM_ORVALUE);
>            ^~~~~
>>> include/asm-generic/pgtable-nop4d-hack.h:47:22: warning: missing braces around initializer [-Wmissing-braces]
>     #define __pud(x)    ((pud_t) { __pgd(x) })
>                          ^
>>> mm/debug_vm_pgtable.c:141:8: note: in expansion of macro '__pud'
>      pud = __pud(pud_val(pud) | RANDOM_ORVALUE);
>            ^~~~~
>    cc1: some warnings being treated as errors

This build failure is expected now given that we have allowed DEBUG_VM_PGTABLE
with EXPERT without platform requiring ARCH_HAS_DEBUG_VM_PGTABLE. This problem
i.e build failure caused without a platform __pgd(), is known to exist both on
ia64 and arm (32bit) platforms. Please refer https://lkml.org/lkml/2019/9/24/314
for details where this was discussed earlier.

- Anshuman

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  reply	other threads:[~2020-02-06  8:21 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-05 10:14 [PATCH V13] mm/debug: Add tests validating architecture page table helpers Anshuman Khandual
2020-02-05 23:10 ` kbuild test robot
2020-02-06  8:19   ` Anshuman Khandual [this message]
2020-02-10  4:52     ` Andrew Morton
2020-02-10  5:35       ` Anshuman Khandual
2020-02-10  6:38         ` Christophe Leroy
2020-02-10 10:02           ` Russell King - ARM Linux admin
2020-02-10 10:46             ` Christophe Leroy
2020-02-10 11:06               ` Russell King - ARM Linux admin
2020-02-11  2:25                 ` Anshuman Khandual
2020-02-11  5:33                   ` Christophe Leroy
2020-02-11  9:24                     ` Russell King - ARM Linux admin

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