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

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.

> 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!

Al did a series to fix various build problems on alpha, see
https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/log/?h=work.alpha
Not sure if he still has to send them to Matt, or if Matt
just needs to apply them.

I also have some alpha patches that I should send upstream.

     Arnd