linux-kernel - Re: [PATCH 1/3] context_tracking: Fix KCSAN noinstr violation

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Date:   Thu, 13 Apr 2023 15:58:01 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>, paulmck@...nel.org,
        keescook@...omium.org
Subject: Re: [PATCH 1/3] context_tracking: Fix KCSAN noinstr violation

Le Wed, Apr 12, 2023 at 10:24:06AM -0700, Josh Poimboeuf a écrit :
> With KCSAN enabled, even empty inline stubs can be out-of-lined.
> 
> Force the context_tracking_guest_exit() stub inline.
> 
> Fixes the following warnings:
> 
>   vmlinux.o: warning: objtool: vmx_vcpu_enter_exit+0x1be: call to context_tracking_guest_exit() leaves .noinstr.text section
>   vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0x85: call to context_tracking_guest_exit() leaves .noinstr.text section
> 
> Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>

Acked-by: Frederic Weisbecker <frederic@...nel.org>

Thanks!