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References: <20190323015227.245455-1-dianders@chromium.org>
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From:   Masahiro Yamada <yamada.masahiro@socionext.com>
Date:   Sat, 30 Mar 2019 21:14:07 +0900
Message-ID: <CAK7LNARe3gQeBqNux4hFoq2-uHRQ=vS_6C=h2Dpy=ruZaRZkEA@mail.gmail.com>
Subject: Re: [PATCH] kdb: Get rid of broken attempt to print CCVERSION in kdb summary
To:     Douglas Anderson <dianders@chromium.org>
Cc:     Daniel Thompson <daniel.thompson@linaro.org>,
        Jason Wessel <jason.wessel@windriver.com>,
        Christophe Leroy <christophe.leroy@c-s.fr>,
        "Peter Zijlstra (Intel)" <peterz@infradead.org>,
        Kees Cook <keescook@chromium.org>,
        kgdb-bugreport@lists.sourceforge.net,
        Johannes Weiner <hannes@cmpxchg.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Nicholas Mc Guire <hofrat@osadl.org>,
        Andrew Morton <akpm@linux-foundation.org>
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Sender: linux-kernel-owner@vger.kernel.org
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On Sat, Mar 23, 2019 at 10:55 AM Douglas Anderson <dianders@chromium.org> wrote:
>
> If you drop into kdb and type "summary", it prints out a line that
> says this:
>
>   ccversion  CCVERSION
>
> ...and I don't mean that it actually prints out the version of the C
> compiler.  It literally prints out the string "CCVERSION".
>
> The version of the C Compiler is already printed at boot up and it
> doesn't seem useful to replicate this in kdb.  Let's just delete it.
> We can also delete the bit of the Makefile that called the C compiler
> in an attempt to pass this into kdb.  This will remove one extra call
> to the C compiler at Makefile parse time and (very slightly) speed up
> builds.
>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> ---

Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>


>  kernel/debug/kdb/Makefile   | 1 -
>  kernel/debug/kdb/kdb_main.c | 1 -
>  2 files changed, 2 deletions(-)
>
> diff --git a/kernel/debug/kdb/Makefile b/kernel/debug/kdb/Makefile
> index d4fc58f4b88d..efac857c5511 100644
> --- a/kernel/debug/kdb/Makefile
> +++ b/kernel/debug/kdb/Makefile
> @@ -6,7 +6,6 @@
>  # Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved.
>  #
>
> -CCVERSION      := $(shell $(CC) -v 2>&1 | sed -ne '$$p')
>  obj-y := kdb_io.o kdb_main.o kdb_support.o kdb_bt.o gen-kdb_cmds.o kdb_bp.o kdb_debugger.o
>  obj-$(CONFIG_KDB_KEYBOARD)    += kdb_keyboard.o
>
> diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
> index 82a3b32a7cfc..fc96dbf8d9de 100644
> --- a/kernel/debug/kdb/kdb_main.c
> +++ b/kernel/debug/kdb/kdb_main.c
> @@ -2522,7 +2522,6 @@ static int kdb_summary(int argc, const char **argv)
>         kdb_printf("machine    %s\n", init_uts_ns.name.machine);
>         kdb_printf("nodename   %s\n", init_uts_ns.name.nodename);
>         kdb_printf("domainname %s\n", init_uts_ns.name.domainname);
> -       kdb_printf("ccversion  %s\n", __stringify(CCVERSION));
>
>         now = __ktime_get_real_seconds();
>         time64_to_tm(now, 0, &tm);
> --
> 2.21.0.392.gf8f6787159e-goog
>


-- 
Best Regards
Masahiro Yamada