linux-kernel - Re: [PATCH] ARC: ARCv2: jump label: implement jump label patching

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Message-ID: <20190620211242.GB3436@hirez.programming.kicks-ass.net>
Date:   Thu, 20 Jun 2019 23:12:42 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Cc:     "Vineet.Gupta1@...opsys.com" <Vineet.Gupta1@...opsys.com>,
        "jbaron@...hat.com" <jbaron@...hat.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "ard.biesheuvel@...aro.org" <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH] ARC: ARCv2: jump label: implement jump label patching

On Thu, Jun 20, 2019 at 06:34:29PM +0000, Eugeniy Paltsev wrote:
> On Wed, 2019-06-19 at 10:12 +0200, Peter Zijlstra wrote:
> > On Tue, Jun 18, 2019 at 04:16:20PM +0000, Vineet Gupta wrote:

> > I'm assuming you've looked at what x86 currently does and found
> > something like that doesn't work for ARC?
> 
> To be honest I've mostly look at arm/arm64 implementation :)

Yeah, but that's fixed instruction width RISC. They have it easy.