Re: [PATCH v5 02/13] syscalls: Create unified partial table for all archs

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] The use of bash process substitution `< <(...)` in a `#!/bin/sh` script will cause syntax errors on systems using strict POSIX shells like `dash`.
--

--- Patch [2]: [PATCH v5 02/13] syscalls: Create unified partial table for all archs ---
commit 47d67094b1a192ac92926cb745138546b214b614
Author: André Almeida <andrealmeid@igalia.com>

syscalls: Create unified partial table for all archs

This commit introduces a shared syscall table for system calls common to all
architectures. It also modifies the generation scripts to support combining a
main table with the common table.

> diff --git a/scripts/syscallhdr.sh b/scripts/syscallhdr.sh
> index bad1ab606a0fb..54e09d3e686c4 100755
> --- a/scripts/syscallhdr.sh
> +++ b/scripts/syscallhdr.sh

[ ... ]

> @@ -84,15 +111,20 @@ grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$abis" "$infile" | {
>  		fi
>  
>  		echo "#define __NR_$prefix$name $nr"
> -	done
>  
> -	if [ -n "$emit_nr" ]; then
> -		echo
> -		echo "#ifdef __KERNEL__"
> -		echo "#define __NR_${prefix}syscalls $(($max + 1))"
> -		echo "#endif"
> -	fi
> +	done < <(grep -E "^[0-9A-Fa-fXx]+[[:space:]]+$abis" "$input")

[Severity: High]
Does this < <(...) process substitution in gen_hdr() break POSIX shell
compatibility?

Because this script is executed with #!/bin/sh, using bashisms like < <(...)
will cause a syntax error on systems where /bin/sh is a strict POSIX shell
like dash, breaking the build.

> +}
>  

[ ... ]

> diff --git a/scripts/syscalltbl.sh b/scripts/syscalltbl.sh
> index c4b1f85c2dd63..91c135143b22f 100755
> --- a/scripts/syscalltbl.sh
> +++ b/scripts/syscalltbl.sh

[ ... ]

> @@ -88,5 +97,13 @@ grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | {
>  			echo "__SYSCALL($nr, sys_ni_syscall)"
>  		fi
>  		nxt=$((nr + 1))
> -	done
> -} > "$outfile"
> +
> +	done < <(grep -E "^[0-9]+[[:space:]]+$abis" "$input")

[Severity: High]
Similarly, does this process substitution in gen_tbl() cause a syntax error on
dash or other strict POSIX shells?

> +
> +}
> +
> +gen_tbl $infile  > "$outfile"

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260812-tonyk-syscall_table-v5-0-3d383927c609@igalia.com?part=2