linux-kernel - Re: [PATCH 09/10] objtool: Drop noinstr hack for KCSAN_WEAK

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Message-ID: <20250818191203.GK3289052@noisy.programming.kicks-ass.net>
Date: Mon, 18 Aug 2025 21:12:03 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Nathan Chancellor <nathan@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>, Kees Cook <kees@...nel.org>,
	Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>, linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev, patches@...ts.linux.dev,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	Marco Elver <elver@...gle.com>, Dmitry Vyukov <dvyukov@...gle.com>,
	kasan-dev@...glegroups.com
Subject: Re: [PATCH 09/10] objtool: Drop noinstr hack for KCSAN_WEAK_MEMORY

On Mon, Aug 18, 2025 at 11:57:25AM -0700, Nathan Chancellor wrote:
> Now that the minimum supported version of LLVM for building the kernel
> has been bumped to 15.0.0, __no_kcsan will always ensure that the thread
> sanitizer functions are not generated, so remove the check for tsan
> functions in is_profiling_func() and the always true depends and
> unnecessary select lines in KCSAN_WEAK_MEMORY.
> 
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>

Acked-by: Peter Zijlstra (Intel) <peterz@...raded.org>