linux-kernel - Re: [PATCH bpf-next 2/5] x86/alternative: introduce text_poke

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Message-ID: <20220518074555.GC10117@worktop.programming.kicks-ass.net>
Date:   Wed, 18 May 2022 09:45:55 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Song Liu <songliubraving@...com>
Cc:     Song Liu <song@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Luis Chamberlain <mcgrof@...nel.org>,
        "Torvalds, Linus" <torvalds@...ux-foundation.org>,
        "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        Kernel Team <Kernel-team@...com>
Subject: Re: [PATCH bpf-next 2/5] x86/alternative: introduce text_poke_set

On Wed, May 18, 2022 at 06:58:46AM +0000, Song Liu wrote:
> Hi Peter, 
> 
> > On May 15, 2022, at 10:40 PM, Song Liu <song@...nel.org> wrote:
> > 
> > Introduce a memset like API for text_poke. This will be used to fill the
> > unused RX memory with illegal instructions.
> > 
> > Suggested-by: Peter Zijlstra <peterz@...radead.org>
> > Signed-off-by: Song Liu <song@...nel.org>
> 
> Could you please share your comments on this? 

I wrote it; it must be good! What specifically you want to know?