linux-kernel - Re: [PATCH v2 3/3] KVM: x86: use static calls to reduce kvm_x86

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Message-ID: <YAFmaMhROa9obFQv@hirez.programming.kicks-ass.net>
Date:   Fri, 15 Jan 2021 10:54:48 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Jason Baron <jbaron@...mai.com>
Cc:     pbonzini@...hat.com, seanjc@...gle.com, kvm@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [PATCH v2 3/3] KVM: x86: use static calls to reduce kvm_x86_ops
 overhead

On Fri, Jan 15, 2021 at 10:53:51AM +0100, Peter Zijlstra wrote:
> @@ -190,6 +191,7 @@ extern int static_call_text_reserved(voi
>  #elif defined(CONFIG_HAVE_STATIC_CALL)
>  
>  static inline long __static_call_return0(void) { return 0; }
> +static inline long __static_call_return0(void) { return 1; }
>  
>  static inline int static_call_init(void) { return 0; }
>  
> @@ -239,6 +241,7 @@ static inline int static_call_text_reser
>  #else /* Generic implementation */
>  
>  static inline long __static_call_return0(void) { return 0; }
> +static inline long __static_call_return0(void) { return 1; }

Too much copy-fail... Lemme go make more tea :-)