Re: [PATCH RFC v3 2/8] syscalls: Create unified partial table for all archs

[Arnd Bergmann]

On Fri, Aug 7, 2026, at 21:34, André Almeida wrote:
> To take advantage of the subset of syscall numbers that are guaranteed to
> be shared, create a new table and adapt generation scripts to use it. In
> that way, every new syscall can be added to a single file.
>
> Create special ABIs in order to make the table work for different archs:
>
>  - `memfd_secret` for archs that implements it

This was already there, so it's not really a new addition. We could
also avoid this entirely and just rely on the stub implementation
from kernel/sys_ni.c for those architectures that don't need it.
They still get the macro definition, but it should be fine to define
that for everyone.

>  - `cln3` for archs that use the common clone3 entry
>  - `__cln3` for archs that use their own special entry point

I guess that's one way to do it. I would probably use the full
clone3/__clone3 name here for consistency.

> Some archs only care about the native entry point and have no compat, so
> create a option to never generate __SYSCALL_WITH_COMPAT() and always
> generate __SYSCALL().

I don't see the purpose of this and would prefer to not add that
extra option if the scripts works fine without it.

>  usage() {
> -	echo >&2 "usage: $0 [--abis ABIS] [--emit-nr] [--offset OFFSET] 
> [--prefix PREFIX] INFILE OUTFILE" >&2
> +	echo >&2 "usage: $0 [--abis ABIS] [--emit-nr] [--offset OFFSET] 
> [--prefix PREFIX] [--common-tbl] INFILE OUTFILE" >&2

This needs to be changed to include the argument of common-tbl

> diff --git a/scripts/syscalltbl.sh b/scripts/syscalltbl.sh
> index c4b1f85c2dd6..c0fd6af2d892 100755
> --- a/scripts/syscalltbl.sh
> +++ b/scripts/syscalltbl.sh
> @@ -16,18 +16,23 @@
>  set -e
> 
>  usage() {
> -	echo >&2 "usage: $0 [--abis ABIS] INFILE OUTFILE" >&2
> +	echo >&2 "usage: $0 [--abis ABIS] [--common-tbl] [--no-compat] INFILE 

same here

     Arnd