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From:   =?UTF-8?B?RGFuaWVsIETDrWF6?= <daniel.diaz@linaro.org>
Date:   Wed, 27 Nov 2019 18:27:55 -0600
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Subject: Re: [PATCH 4.19 000/306] 4.19.87-stable review
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     open list <linux-kernel@vger.kernel.org>,
        torvalds@linux-foundation.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Guenter Roeck <linux@roeck-us.net>,
        Shuah Khan <shuah@kernel.org>, patches@kernelci.org,
        Ben Hutchings <ben.hutchings@codethink.co.uk>,
        lkft-triage@lists.linaro.org,
        linux- stable <stable@vger.kernel.org>
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Hello!


On Wed, 27 Nov 2019 at 14:55, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> This is the start of the stable review cycle for the 4.19.87 release.
> There are 306 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Fri, 29 Nov 2019 20:18:09 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-=
4.19.87-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable=
-rc.git linux-4.19.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

We're seeing this build failure on 4.19 (and 4.14) on x86 32-bits:
> In file included from /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core=
2-32/kernel-source/include/linux/export.h:45:0,
>                  from /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core=
2-32/kernel-source/include/linux/linkage.h:7,
>                  from /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core=
2-32/kernel-source/include/linux/preempt.h:10,
>                  from /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core=
2-32/kernel-source/include/linux/spinlock.h:51,
>                  from /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core=
2-32/kernel-source/arch/x86/mm/cpu_entry_area.c:3:
> In function 'setup_cpu_entry_area_ptes',
>     inlined from 'setup_cpu_entry_areas' at /srv/oe/build/tmp-lkft-glibc/=
work-shared/intel-core2-32/kernel-source/arch/x86/mm/cpu_entry_area.c:209:2=
:
> /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core2-32/kernel-source/inc=
lude/linux/compiler.h:348:38: error: call to '__compiletime_assert_192' dec=
lared with attribute error: BUILD_BUG_ON failed: (CPU_ENTRY_AREA_PAGES+1)*P=
AGE_SIZE !=3D CPU_ENTRY_AREA_MAP_SIZE
>   _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>                                       ^
> /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core2-32/kernel-source/inc=
lude/linux/compiler.h:329:4: note: in definition of macro '__compiletime_as=
sert'
>     prefix ## suffix();    \
>     ^~~~~~
> /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core2-32/kernel-source/inc=
lude/linux/compiler.h:348:2: note: in expansion of macro '_compiletime_asse=
rt'
>   _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>   ^~~~~~~~~~~~~~~~~~~
> /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core2-32/kernel-source/inc=
lude/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_asse=
rt'
>  #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
>                                      ^~~~~~~~~~~~~~~~~~
> /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core2-32/kernel-source/inc=
lude/linux/build_bug.h:69:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
>   BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
>   ^~~~~~~~~~~~~~~~
> /srv/oe/build/tmp-lkft-glibc/work-shared/intel-core2-32/kernel-source/arc=
h/x86/mm/cpu_entry_area.c:192:2: note: in expansion of macro 'BUILD_BUG_ON'
>   BUILD_BUG_ON((CPU_ENTRY_AREA_PAGES+1)*PAGE_SIZE !=3D CPU_ENTRY_AREA_MAP=
_SIZE);
>   ^~~~~~~~~~~~

Bisection points to "x86/cpu_entry_area: Add guard page for entry
stack on 32bit" (e50622b4a1, also present in 4.14.y as 880a98c339).

Greetings!

Daniel D=C3=ADaz
daniel.diaz@linaro.org