linux-kernel - Re: [PATCH] scripts: Fix incremental build header re-generation

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Message-ID: <CAK7LNARjxtyiBAfejQKePp-f=MTpA2PjAEedsHyCjHx6_eoJqA@mail.gmail.com>
Date:   Tue, 2 Mar 2021 12:36:42 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Jeevan Shriram <jshriram@...eaurora.org>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Trilok Soni <tsoni@...eaurora.org>
Subject: Re: [PATCH] scripts: Fix incremental build header re-generation

On Mon, Mar 1, 2021 at 11:23 PM Jeevan Shriram <jshriram@...eaurora.org> wrote:
>
> compile.h and autoconf.h are ignored when checking headers sha as they
> are always re-generated for every kernel compilation. However,
> these two headers are packaged into kheaders tar. During incremental
> compilation of kernel, kheaders tar file is always generated and re-packaged
> irrespective of the changes in headers.


I do not see this problem.
Could you describe the steps to reproduce it, please?







> Change-Id: I7a64faebb81df44c32230b0fea1d6df09d7ce66f
> Signed-off-by: Jeevan Shriram <jshriram@...eaurora.org>
> ---
>  kernel/gen_kheaders.sh | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/kernel/gen_kheaders.sh b/kernel/gen_kheaders.sh
> index c1510f0..5499f72 100755
> --- a/kernel/gen_kheaders.sh
> +++ b/kernel/gen_kheaders.sh
> @@ -51,8 +51,7 @@ this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)"
>  if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi
>  if [ -f kernel/kheaders.md5 ] &&
>         [ "$(head -n 1 kernel/kheaders.md5)" = "$headers_md5" ] &&
> -       [ "$(head -n 2 kernel/kheaders.md5 | tail -n 1)" = "$this_file_md5" ] &&
> -       [ "$(tail -n 1 kernel/kheaders.md5)" = "$tarfile_md5" ]; then
> +       [ "$(head -n 2 kernel/kheaders.md5 | tail -n 1)" = "$this_file_md5" ]; then
>                 exit
>  fi
>
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>


-- 
Best Regards
Masahiro Yamada