linux-kernel - Re: [PATCH] scripts: get_abi.pl: make undefined search more deterministic

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Date:   Wed, 29 Sep 2021 09:13:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scripts: get_abi.pl: make undefined search more
 deterministic

On Tue, Sep 28, 2021 at 11:51:32PM +0200, Mauro Carvalho Chehab wrote:
> Sort keys on hashes during undefined search, in order to
> make the script more deterministic.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> ---
>  scripts/get_abi.pl | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/scripts/get_abi.pl b/scripts/get_abi.pl
> index 841d889747c0..d32dcd7cca5d 100755
> --- a/scripts/get_abi.pl
> +++ b/scripts/get_abi.pl
> @@ -775,6 +775,8 @@ sub check_undefined_symbols {
>  	my $next_i = 0;
>  	my $start_time = times;
>  
> +	@files = sort @files;
> +
>  	my $last_time = $start_time;
>  
>  	# When either debug or hint is enabled, there's no sense showing
> @@ -909,16 +911,16 @@ sub undefined_symbols {
>  		}
>  	}
>  	# Compile regexes
> -	foreach my $l (keys %leaf) {
> +	foreach my $l (sort keys %leaf) {
>  		my @expr;
> -		foreach my $w(split /\xac/, $leaf{$l}->{what}) {
> +		foreach my $w(sort split /\xac/, $leaf{$l}->{what}) {
>  			push @expr, qr /^$w$/;
>  		}
>  		$leaf{$l}->{expr} = \@expr;
>  	}
>  
>  	# Take links into account
> -	foreach my $link (keys %aliases) {
> +	foreach my $link (sort keys %aliases) {
>  		my $abs_file = $aliases{$link};
>  		graph_add_link($abs_file, $link);
>  	}
> -- 
> 2.31.1
> 

Much better, now we are at a reproducable 10 seconds on my large box.
Thanks for all the work on this, now to go and start adding the missing
documentation :)

greg k-h