linux-kernel - Re: [PATCH] kbuild: Disable extra debugging info in .s output

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Message-ID: <20190201103648.GF31854@zn.tnic>
Date:   Fri, 1 Feb 2019 11:36:48 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [PATCH] kbuild: Disable extra debugging info in .s output

On Fri, Feb 01, 2019 at 11:30:38AM +0100, Borislav Petkov wrote:
> This can't be a full kernel build.

So I did this:

$(obj)/%.s: $(src)/%.c FORCE
        @echo "HERE\n"
        $(call if_changed_dep,cc_s_c)

and did a full kernel build with my .config. I got exactly *three*
"HERE"s in the build log.

So pls explain in more detail how you're measuring that slowdown.

Thx.

-- 
Regards/Gruss,
    Boris.

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