linux-kernel - Re: [PATCH 0/2] powerpc: Fix livepatch module re-patching issue

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Date:   Sat, 4 Feb 2023 09:23:57 -0800
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     live-patching@...r.kernel.org, Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Song Liu <song@...nel.org>
Subject: Re: [PATCH 0/2] powerpc: Fix livepatch module re-patching issue

On Tue, Jan 24, 2023 at 07:38:03PM -0800, Josh Poimboeuf wrote:
> Fix a livepatch bug seen when reloading a patched module.
> 
> This is the powerpc counterpart to Song Liu's fix for a similar issue on
> x86:
> 
>   https://lkml.kernel.org/lkml/20230121004945.697003-2-song@kernel.org
> 
> Josh Poimboeuf (2):
>   powerpc/module_64: Improve restore_r2() return semantics
>   powerpc/module_64: Fix "expected nop" error on module re-patching
> 
>  arch/powerpc/kernel/module_64.c | 29 ++++++++++++++++++-----------
>  1 file changed, 18 insertions(+), 11 deletions(-)

Hi Michael,

Ping?  Any objections to this?

The x86 counterpart to this is queued for 6.3, it would be nice if this
also landed.  We could take it through the livepatch tree if needed.

-- 
Josh