linux-kernel - Re: [PATCH v2 06/24] x86: Always inline context_tracking_guest

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Message-ID: <20210820232203.nmuc3gelzsazyewk@treble>
Date:   Fri, 20 Aug 2021 16:22:03 -0700
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org, joro@...tes.org,
        boris.ostrovsky@...cle.com, jgross@...e.com, x86@...nel.org,
        mbenes@...e.com, rostedt@...dmis.org, dvyukov@...gle.com,
        elver@...gle.com
Subject: Re: [PATCH v2 06/24] x86: Always inline
 context_tracking_guest_enter()

On Thu, Jun 24, 2021 at 11:41:05AM +0200, Peter Zijlstra wrote:
> Yes, it really did out-of-line this....
> 
> vmlinux.o: warning: objtool: vmx_vcpu_enter_exit()+0x31: call to context_tracking_guest_enter() leaves .noinstr.text section
> 
> 000000000019f660 <context_tracking_guest_enter>:
>   19f660:	e8 00 00 00 00       	callq  19f665 <context_tracking_guest_enter+0x5>	19f661: R_X86_64_PLT32	__sanitizer_cov_trace_pc-0x4
>   19f665:	31 c0                	xor    %eax,%eax
>   19f667:	c3                   	retq   
> 
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Ha.  I'm guessing this was from CONFIG_DEBUG_SECTION_MISMATCH, which is
only good for triggering a lot of these useless __always_inline patches.

I have a patch somewhere to get rid of it.

-- 
Josh