linux-kernel - Re: [PATCH v3 0/2] objtool: Add option to fail build on vmlinux warnings

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Message-ID: <20250114001440.cagqlvjfvw6ghsj7@jpoimboe>
Date: Mon, 13 Jan 2025 16:14:40 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: Brendan Jackman <jackmanb@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>, linux-kernel@...r.kernel.org,
	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH v3 0/2] objtool: Add option to fail build on vmlinux
 warnings

On Mon, Jan 13, 2025 at 02:05:14PM +0000, Brendan Jackman wrote:
> This adds an option to objtool to exit with an error when it enounters
> warnings.
> 
> Then, it adds a config to enable that flag. This enables you to fail
> the build e.g. when noinstr is violated.
> 
> When that happens, you also get a more verbose log, for example when
> failing noisntr validation it dumps disassembly of the offending code.
> 
> Signed-off-by: Brendan Jackman <jackmanb@...gle.com>
> ---
> Changes in v3:
> - Added --verbose to objtool args (equivalent to OBJTOOL_VERBOSE=1, which
>   Josh Poimboeuf suggested).
> - Link to v2: https://lore.kernel.org/r/20241218-objtool-strict-v2-0-a5297c961434@google.com

Thanks!  I'm putting it through bot testing now.

-- 
Josh