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

["Arnd Bergmann" <arnd@arndb.de>]

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