linux-kernel - Re: [PATCH RFC 0/3] mm/gup: consistently call it GUP-fast

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <10da3ced-9a79-4ebb-a77d-1aa49cc61952@app.fastmail.com>
Date: Thu, 28 Mar 2024 07:09:13 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Vineet Gupta" <vgupta@...nel.org>,
 "David Hildenbrand" <david@...hat.com>, peterx <peterx@...hat.com>
Cc: linux-kernel@...r.kernel.org, "Andrew Morton" <akpm@...ux-foundation.org>,
 "Mike Rapoport" <rppt@...nel.org>, "Jason Gunthorpe" <jgg@...dia.com>,
 "John Hubbard" <jhubbard@...dia.com>, linux-arm-kernel@...ts.infradead.org,
 loongarch@...ts.linux.dev, linux-mips@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
 linux-sh@...r.kernel.org, linux-mm@...ck.org,
 linux-perf-users@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 x86@...nel.org, "Ryan Roberts" <ryan.roberts@....com>,
 "Alexander Viro" <viro@...iv.linux.org.uk>,
 "Matt Turner" <mattst88@...il.com>, "Alexey Brodkin" <abrodkin@...opsys.com>
Subject: Re: [PATCH RFC 0/3] mm/gup: consistently call it GUP-fast

On Thu, Mar 28, 2024, at 06:51, Vineet Gupta wrote:
> On 3/27/24 09:22, Arnd Bergmann wrote:
>> On Wed, Mar 27, 2024, at 16:39, David Hildenbrand wrote:
>>> On 27.03.24 16:21, Peter Xu wrote:
>>>> On Wed, Mar 27, 2024 at 02:05:35PM +0100, David Hildenbrand wrote:
>>>>
>>>> I'm not sure what config you tried there; as I am doing some build tests
>>>> recently, I found turning off CONFIG_SAMPLES + CONFIG_GCC_PLUGINS could
>>>> avoid a lot of issues, I think it's due to libc missing.  But maybe not the
>>>> case there.
>>> CCin Arnd; I use some of his compiler chains, others from Fedora directly. For
>>> example for alpha and arc, the Fedora gcc is "13.2.1".
>>> But there is other stuff like (arc):
>>>
>>> ./arch/arc/include/asm/mmu-arcv2.h: In function 'mmu_setup_asid':
>>> ./arch/arc/include/asm/mmu-arcv2.h:82:9: error: implicit declaration of 
>>> function 'write_aux_reg' [-Werro
>>> r=implicit-function-declaration]
>>>     82 |         write_aux_reg(ARC_REG_PID, asid | MMU_ENABLE);
>>>        |         ^~~~~~~~~~~~~
>> Seems to be missing an #include of soc/arc/aux.h, but I can't
>> tell when this first broke without bisecting.
>
> Weird I don't see this one but I only have gcc 12 handy ATM.
>
>     gcc version 12.2.1 20230306 (ARC HS GNU/Linux glibc toolchain -
> build 1360)
>
> I even tried W=1 (which according to scripts/Makefile.extrawarn) should
> include -Werror=implicit-function-declaration but don't see this still.
>
> Tomorrow I'll try building a gcc 13.2.1 for ARC.

David reported them with the toolchains I built at
https://mirrors.edge.kernel.org/pub/tools/crosstool/
I'm fairly sure the problem is specific to the .config
and tree, not the toolchain though.

>>> or (alpha)
>>>
>>> WARNING: modpost: "saved_config" [vmlinux] is COMMON symbol
>>> ERROR: modpost: "memcpy" [fs/reiserfs/reiserfs.ko] undefined!
>>> ERROR: modpost: "memcpy" [fs/nfs/nfs.ko] undefined!
>>> ERROR: modpost: "memcpy" [fs/nfs/nfsv3.ko] undefined!
>>> ERROR: modpost: "memcpy" [fs/nfsd/nfsd.ko] undefined!
>>> ERROR: modpost: "memcpy" [fs/lockd/lockd.ko] undefined!
>>> ERROR: modpost: "memcpy" [crypto/crypto.ko] undefined!
>>> ERROR: modpost: "memcpy" [crypto/crypto_algapi.ko] undefined!
>>> ERROR: modpost: "memcpy" [crypto/aead.ko] undefined!
>>> ERROR: modpost: "memcpy" [crypto/crypto_skcipher.ko] undefined!
>>> ERROR: modpost: "memcpy" [crypto/seqiv.ko] undefined!
>
> Are these from ARC build or otherwise ?

This was arch/alpha.

      Arnd