Re: [PATCH 5.12 000/677] 5.12.4-rc1 review

[Greg Kroah-Hartman]

On Wed, May 12, 2021 at 10:53:04PM +0530, Naresh Kamboju wrote:
> On Wed, 12 May 2021 at 21:27, Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > This is the start of the stable review cycle for the 5.12.4 release.
> > There are 677 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, 14 May 2021 14:47:09 +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/v5.x/stable-review/patch-5.12.4-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-5.12.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> 
> 
> MIPS Clang build regression detected.
> MIPS gcc-10,9 and 8 build PASS.
> 
> > Maciej W. Rozycki <macro@xxxxxxxxxxx>
> >     MIPS: Reinstate platform `__div64_32' handler
> 
> mips clang build breaks on stable rc 5.4 .. 5.12 due to below warnings / errors
>  - mips (defconfig) with clang-12
>  - mips (tinyconfig) with clang-12
>  - mips (allnoconfig) with clang-12
> 
> make --silent --keep-going --jobs=8
> O=/home/tuxbuild/.cache/tuxmake/builds/current ARCH=mips
> CROSS_COMPILE=mips-linux-gnu- 'HOSTCC=sccache clang' 'CC=sccache
> clang'
> kernel/time/hrtimer.c:318:2: error: couldn't allocate output register
> for constraint 'x'
>         do_div(tmp, (u32) div);
>         ^
> include/asm-generic/div64.h:243:11: note: expanded from macro 'do_div'
>                 __rem = __div64_32(&(n), __base);       \
>                         ^
> arch/mips/include/asm/div64.h:74:11: note: expanded from macro '__div64_32'
>                 __asm__("divu   $0, %z1, %z2"                           \
>                         ^
> 1 error generated.

Does this also show up in Linus's tree?  The same MIPS patch is there as
well from what I can tell.

thanks,

greg k-h