linux-kernel - Re: [PATCH 5.4 49/52] powerpc/bpf: Fix BPF

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Message-ID: <YWUuSxGRyqIaqETE@kroah.com>
Date:   Tue, 12 Oct 2021 08:42:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-stable <stable@...r.kernel.org>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Johan Almbladh <johan.almbladh@...finetworks.com>,
        Song Liu <songliubraving@...com>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH 5.4 49/52] powerpc/bpf: Fix BPF_MOD when imm == 1

On Mon, Oct 11, 2021 at 08:53:16PM -0400, Sasha Levin wrote:
> On Mon, Oct 11, 2021 at 08:24:30PM +0200, Christophe Leroy wrote:
> > 
> > 
> > Le 11/10/2021 à 19:33, Naresh Kamboju a écrit :
> > > stable-rc 5.4 build failed due this patch.
> > >  - powerpc gcc-10-defconfig - FAILED
> > >  - powerpc gcc-11-defconfig - FAILED
> > >  - powerpc gcc-8-defconfig - FAILED
> > >  - powerpc gcc-9-defconfig - FAILED
> > > 
> > > 
> > > On Mon, 11 Oct 2021 at 19:28, Greg Kroah-Hartman
> > > <gregkh@...uxfoundation.org> wrote:
> > > > 
> > > > From: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
> > > > 
> > > > [ Upstream commit 8bbc9d822421d9ac8ff9ed26a3713c9afc69d6c8 ]
> > > > 
> > > > Only ignore the operation if dividing by 1.
> > > 
> > > <trim>
> > > 
> > > In file included from arch/powerpc/net/bpf_jit64.h:11,
> > >                  from arch/powerpc/net/bpf_jit_comp64.c:19:
> > > arch/powerpc/net/bpf_jit_comp64.c: In function 'bpf_jit_build_body':
> > > arch/powerpc/net/bpf_jit_comp64.c:415:46: error: implicit declaration
> > > of function 'PPC_RAW_LI'; did you mean 'PPC_RLWIMI'?
> > 
> > PPC_RAW_LI() was added by commit 3a1812379163 ("powerpc/ppc-opcode:
> > Consolidate powerpc instructions from bpf_jit.h")
> > 
> > Priori to that you have to use PPC_LI() instead, with the same arguments.
> 
> I think that I forgot to reply: I've pushed a fixed patch resolved as
> proposed above.

Thanks, I'll go push out new -rc for 4.19 and 5.4 now.

greg k-h