linux-kernel - Re: mm/slub.c:1163:17: error: implicit declaration of function '__memset'; did you mean '__memset64'? [-Werror=implicit-function-declaration]

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Date: Tue, 18 Jun 2024 11:42:56 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: open list <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
 lkft-triage@...ts.linaro.org, Linux Regressions
 <regressions@...ts.linux.dev>, Ilya Leoshkevich <iii@...ux.ibm.com>,
 Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>, David
 Rientjes <rientjes@...gle.com>, Joonsoo Kim <iamjoonsoo.kim@....com>,
 Anders Roxell <anders.roxell@...aro.org>, Dan Carpenter
 <dan.carpenter@...aro.org>, Arnd Bergmann <arnd@...db.de>
Subject: Re: mm/slub.c:1163:17: error: implicit declaration of function
 '__memset'; did you mean '__memset64'?
 [-Werror=implicit-function-declaration]

On Tue, 18 Jun 2024 16:09:38 +0530 Naresh Kamboju <naresh.kamboju@...aro.org> wrote:

> The Following build failures have been noticed on Powerpc, mips and arc on the
> Linux next-20240617 tag.
> 
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> 
> Regressions found on mips:
>   - gcc-12-bcm47xx_defconfig
>   - gcc-12-cavium_octeon_defconfig
>   - gcc-8-malta_defconfig
>   - gcc-12-malta_defconfig
>   - gcc-12-allnoconfig
>   - gcc-8-bcm47xx_defconfig
>   - gcc-8-allnoconfig
>   - gcc-8-cavium_octeon_defconfig
>   - clang-18-allnoconfig
>   - clang-nightly-allnoconfig
> 
> 
> Regressions found on arc:
>   - gcc-9-allnoconfig
>   - gcc-9-defconfig
> 
> Regressions found on powerpc:
>   - clang-18-maple_defconfig
>   - gcc-13-ppc6xx_defconfig
>   - clang-18-allnoconfig
>   - clang-18-defconfig
>   - clang-18-ppc64e_defconfig
>   - gcc-13-defconfig
> 
> Build log:
> --------
> mm/slub.c: In function 'init_object':
> mm/slub.c:1163:17: error: implicit declaration of function '__memset';
> did you mean '__memset64'? [-Werror=implicit-function-declaration]
>  1163 |                 __memset(p - s->red_left_pad, val, s->red_left_pad);
>       |                 ^~~~~~~~
>       |                 __memset64
> 
> The commit id:
>   ad5dde7da5f9 kmsan: support SLAB_POISON

Thanks.  I was hoping for at least a temporary workaround for this, but
nothing is happening.  I'll disable that patch for now.