linux-kernel - Re: [PATCH v2 0/3] Detect changed compiler dependencies for full rebuild

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Message-ID: <CAK7LNAQCZMmAGfPTr1kgp5cNSdnLWMU5kC_duU0WzWnwZrqt2A@mail.gmail.com>
Date: Sat, 3 May 2025 18:39:28 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Kees Cook <kees@...nel.org>
Cc: Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas.schier@...ux.dev>, 
	Petr Pavlu <petr.pavlu@...e.com>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, 
	Justin Stitt <justinstitt@...gle.com>, Marco Elver <elver@...gle.com>, 
	Andrey Konovalov <andreyknvl@...il.com>, Andrey Ryabinin <ryabinin.a.a@...il.com>, 
	Richard Weinberger <richard@....at>, Anton Ivanov <anton.ivanov@...bridgegreys.com>, 
	Johannes Berg <johannes@...solutions.net>, linux-kernel@...r.kernel.org, 
	linux-hardening@...r.kernel.org, linux-kbuild@...r.kernel.org, 
	kasan-dev@...glegroups.com, linux-um@...ts.infradead.org
Subject: Re: [PATCH v2 0/3] Detect changed compiler dependencies for full rebuild

On Sat, May 3, 2025 at 7:54 AM Kees Cook <kees@...nel.org> wrote:
>
>  v2:
>   - switch from -include to -I with a -D gated include compiler-version.h
>  v1: https://lore.kernel.org/lkml/20250501193839.work.525-kees@kernel.org/


What do you think of my patch as a prerequisite?
https://lore.kernel.org/linux-kbuild/20250503084145.1994176-1-masahiroy@kernel.org/T/#u
Perhaps, can you implement this series more simply?

My idea is to touch a single include/generated/global-rebuild.h
rather than multiple files such as gcc-plugins-deps.h, integer-wrap.h, etc.

When the file is touched, the entire kernel source tree will be rebuilt.
This may rebuild more than needed (e.g. vdso) but I do not think
it is a big deal.




-- 
Best Regards
Masahiro Yamada