linux-kernel - Re: [PATCH 6/8] x86: Machine-readable syscall tables and scripts to process them

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Date:	Fri, 18 Nov 2011 14:15:58 -0800
From:	Matt Helsley <matthltc@...ibm.com>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, kbuild@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, "H.J. Lu" <hjl.tools@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Michal Marek <mmarek@...e.cz>, Sam Ravnborg <sam@...nborg.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH 6/8] x86: Machine-readable syscall tables and scripts to
 process them

On Thu, Nov 17, 2011 at 02:37:24PM -0800, H. Peter Anvin wrote:

<snip>

> diff --git a/arch/x86/syscalls/syscallhdr.sh b/arch/x86/syscalls/syscallhdr.sh
> new file mode 100644
> index 0000000..0d473ff
> --- /dev/null
> +++ b/arch/x86/syscalls/syscallhdr.sh
> @@ -0,0 +1,36 @@
> +#!/bin/sh
> +
> +in="$1"
> +out="$2"
> +my_abis=`echo "$3" | tr ',' ' '`

I think you can remove in_list() and just use grep to get your
selected abis:

my_abis=`echo "($3)" | tr ',' '|'`

> +prefix="$4"
> +offset="$5"
> +
> +fileguard=_ASM_X86_`basename "$out" | sed \
> +    -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
> +    -e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`
> +
> +in_list () {
> +    local x
> +    for x in $1; do
> +	if [ x"$x" = x"$2" ]; then
> +	    return 0
> +	fi
> +    done
> +    return 1
> +}
> +
> +grep '^[0-9]' "$in" | sort -n | (

grep "^[0-9]$my_abis" "$in" | sort -n | (

> +    echo "#ifndef ${fileguard}"
> +    echo "#define ${fileguard} 1"
> +    echo ""
> +
> +    while read nr abi name entry ; do
> +	if in_list "$my_abis" "$abi"; then
> +	    echo "#define __NR_${prefix}${name}" $((nr+offset))
> +        fi

nanoscale nit: whitespace

> +    done

And finally this becomes:

while read nr abi name entry ; do
    echo "#define __NR_${prefix}${name}" $((nr+offset))
done

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