linux-kernel - Re: [PATCH v2] tools/memory-model: Use "grep -E" instead of "egrep"

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Message-ID: <20221122014519.GZ4001@paulmck-ThinkPad-P17-Gen-1>
Date:   Mon, 21 Nov 2022 17:45:19 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc:     Alan Stern <stern@...land.harvard.edu>,
        Andrea Parri <parri.andrea@...il.com>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        Akira Yokosawa <akiyks@...il.com>,
        Daniel Lustig <dlustig@...dia.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] tools/memory-model: Use "grep -E" instead of "egrep"

On Mon, Nov 21, 2022 at 11:25:38AM +0800, Tiezhu Yang wrote:
> The latest version of grep claims the egrep is now obsolete so the build
> now contains warnings that look like:
> 	egrep: warning: egrep is obsolescent; using grep -E
> fix this up by moving the related file to use "grep -E" instead.
> 
>   sed -i "s/egrep/grep -E/g" `grep egrep -rwl tools/memory-model`
> 
> Here are the steps to install the latest grep:
> 
>   wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz
>   tar xf grep-3.8.tar.gz
>   cd grep-3.8 && ./configure && make
>   sudo make install
>   export PATH=/usr/local/bin:$PATH
> 
> Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> Reviewed-by: Akira Yokosawa <akiyks@...il.com>

Queued and pushed, thank you both!

							Thanx, Paul

> ---
> 
> v2: rebase on linux-rcu.git dev
> 
>  tools/memory-model/scripts/checkghlitmus.sh | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/memory-model/scripts/checkghlitmus.sh b/tools/memory-model/scripts/checkghlitmus.sh
> index cedd029..d3dfb32 100755
> --- a/tools/memory-model/scripts/checkghlitmus.sh
> +++ b/tools/memory-model/scripts/checkghlitmus.sh
> @@ -36,13 +36,13 @@ fi
>  # Create a list of the specified litmus tests previously run.
>  ( cd $LKMM_DESTDIR; find litmus -name "*.litmus${hwfnseg}.out" -print ) |
>  	sed -e "s/${hwfnseg}"'\.out$//' |
> -	xargs -r egrep -l '^ \* Result: (Never|Sometimes|Always|DEADLOCK)' |
> +	xargs -r grep -E -l '^ \* Result: (Never|Sometimes|Always|DEADLOCK)' |
>  	xargs -r grep -L "^P${LKMM_PROCS}"> $T/list-C-already
>  
>  # Create a list of C-language litmus tests with "Result:" commands and
>  # no more than the specified number of processes.
>  find litmus -name '*.litmus' -print | mselect7 -arch C > $T/list-C
> -xargs < $T/list-C -r egrep -l '^ \* Result: (Never|Sometimes|Always|DEADLOCK)' > $T/list-C-result
> +xargs < $T/list-C -r grep -E -l '^ \* Result: (Never|Sometimes|Always|DEADLOCK)' > $T/list-C-result
>  xargs < $T/list-C-result -r grep -L "^P${LKMM_PROCS}" > $T/list-C-result-short
>  
>  # Form list of tests without corresponding .out files
> -- 
> 2.1.0
>