linux-kernel - Re: [PATCH] x86/asm: Remove unused COMPILE

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Date:   Mon, 28 Nov 2022 19:00:49 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Vincent MAILHOL <mailhol.vincent@...adoo.fr>
Cc:     kirill.shutemov@...ux.intel.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, hpa@...or.com, jpoimboe@...nel.org,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com, seanjc@...gle.com,
        tglx@...utronix.de, viro@...iv.linux.org.uk, x86@...nel.org
Subject: Re: [PATCH] x86/asm: Remove unused COMPILE_OFFSETS macro from
 asm-offsets.c

On 11/28/22 18:45, Steven Rostedt wrote:
> 
>>> If you are sure <asm/ftrace.h> is never included from asm-offsets.c,
>>> remove #ifndef COMPILE_OFFSETS too.
>> It is never included from asm-offsets.c but it is still used by
>> kvm-asm-offsets.c:
>> https://elixir.bootlin.com/linux/v6.1-rc7/source/arch/x86/kvm/kvm-asm-offsets.c#L7
> IIRC, the reason for adding that was because that logic was screwing up
> asm-offsets.c. I'm not sure it screws up kvm-asm-offsets.c though.
> 
> This is one of those cases I wish I commented that code better :-/

I don't think KVM includes linux/ftrace.h or asm/ftrace.h at all.

Paolo