netdev - Re: [PATCH v6 bpf-next 6/7] bpf: introduce bpf_prog

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Message-ID: <Ye6fYhwF9f+0NvhI@hirez.programming.kicks-ass.net>
Date:   Mon, 24 Jan 2022 13:45:22 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Song Liu <songliubraving@...com>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>,
        Song Liu <song@...nel.org>, bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Kernel Team <Kernel-team@...com>, X86 ML <x86@...nel.org>
Subject: Re: [PATCH v6 bpf-next 6/7] bpf: introduce bpf_prog_pack allocator

On Sun, Jan 23, 2022 at 01:03:25AM +0000, Song Liu wrote:

> I guess we can introduce something similar to bpf_arch_text_poke() 
> for this? 

IIRC the s390 version of the text_poke_copy() function is called
s390_kernel_write().