linux-kernel - Re: [PATCH 1/2] locking/atomics: Change 'fold' to 'grep'

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Date:   Mon, 10 Dec 2018 19:01:07 +0000
From:   Will Deacon <will.deacon@....com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, anders.roxell@...aro.org,
        boqun.feng@...il.com, naresh.kamboju@...aro.org,
        peterz@...radead.org
Subject: Re: [PATCH 1/2] locking/atomics: Change 'fold' to 'grep'

On Mon, Dec 10, 2018 at 05:50:34PM +0000, Mark Rutland wrote:
> From: Anders Roxell <anders.roxell@...aro.org>
> 
> Some distibutions and build systems doesn't include 'fold' from
> coreutils default.
> 
> .../scripts/atomic/atomic-tbl.sh: line 183: fold: command not found
> 
> Rework to use 'grep' instead of 'fold' to use a dependency that is
> already used a lot in the kernel.
> 
> Reported-by: Naresh Kamboju <naresh.kamboju@...aro.org>
> Suggested-by: Will Deacon <will.deacon@....com>
> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
> [Mark: rework commit message]
> Signed-off-by: Mark Rutland <mark.rutland@....com>
> ---
>  scripts/atomic/atomic-tbl.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/atomic/atomic-tbl.sh b/scripts/atomic/atomic-tbl.sh
> index 9d6be538a987..81d5c32039dd 100755
> --- a/scripts/atomic/atomic-tbl.sh
> +++ b/scripts/atomic/atomic-tbl.sh
> @@ -180,7 +180,7 @@ gen_proto_variants()
>  #gen_proto(meta, ...)
>  gen_proto() {
>  	local meta="$1"; shift
> -	for m in $(echo "${meta}" | fold -w1); do
> +	for m in $(echo "${meta}" | grep -o .); do
>  		gen_proto_variants "${m}" "$@"
>  	done
>  }

Acked-by: Will Deacon <will.deacon@....com>

Will