linux-kernel - Re: [PATCH] drm/amdkfd: remove unused sq_int

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Message-ID: <CADnq5_NP=bGpe6cih7pnYauNWccLzetzZxvg2zAiaWrJRJQG9w@mail.gmail.com>
Date:   Wed, 31 May 2023 14:16:54 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     "Kim, Jonathan" <Jonathan.Kim@....com>
Cc:     "Kuehling, Felix" <Felix.Kuehling@....com>,
        Tom Rix <trix@...hat.com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        "airlied@...il.com" <airlied@...il.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "nathan@...nel.org" <nathan@...nel.org>,
        "ndesaulniers@...gle.com" <ndesaulniers@...gle.com>,
        "llvm@...ts.linux.dev" <llvm@...ts.linux.dev>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amdkfd: remove unused sq_int_priv variable

On Thu, Mar 30, 2023 at 12:04 PM Kim, Jonathan <Jonathan.Kim@....com> wrote:
>
> [Public]
>
> Hi Felix,
>
> That is correct.  The debugger will need sq_int_priv to work.

I'll just apply this for now.  We can squash the revert into the
debugger changes once those land.

Alex

>
> Thanks,
>
> Jon
>
> > -----Original Message-----
> > From: Kuehling, Felix <Felix.Kuehling@....com>
> > Sent: Thursday, March 30, 2023 11:39 AM
> > To: Tom Rix <trix@...hat.com>; Deucher, Alexander
> > <Alexander.Deucher@....com>; Koenig, Christian
> > <Christian.Koenig@....com>; Pan, Xinhui <Xinhui.Pan@....com>;
> > airlied@...il.com; daniel@...ll.ch; nathan@...nel.org;
> > ndesaulniers@...gle.com; Kim, Jonathan <Jonathan.Kim@....com>
> > Cc: amd-gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org; linux-
> > kernel@...r.kernel.org; llvm@...ts.linux.dev
> > Subject: Re: [PATCH] drm/amdkfd: remove unused sq_int_priv variable
> >
> > Am 2023-03-30 um 11:20 schrieb Tom Rix:
> > > clang with W=1 reports
> > > drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_int_process_v11.c:282:38:
> > error: variable
> > >    'sq_int_priv' set but not used [-Werror,-Wunused-but-set-variable]
> > >          uint8_t sq_int_enc, sq_int_errtype, sq_int_priv;
> > >                                              ^
> > > This variable is not used so remove it.
> >
> > Hi Jon,
> >
> > I think your debugger patches are going to start using this. Can you
> > comment?
> >
> > I'd prefer not to apply this patch now, as Jon's patches are expected to
> > land soon, once Alex is done upstreaming GFX 9.4.3 support.
> >
> > Regards,
> >    Felix
> >
> >
> > >
> > > Signed-off-by: Tom Rix <trix@...hat.com>
> > > ---
> > >   drivers/gpu/drm/amd/amdkfd/kfd_int_process_v11.c | 9 +--------
> > >   1 file changed, 1 insertion(+), 8 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v11.c
> > b/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v11.c
> > > index 0d53f6067422..bbd646c0dee7 100644
> > > --- a/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v11.c
> > > +++ b/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v11.c
> > > @@ -279,7 +279,7 @@ static void event_interrupt_wq_v11(struct kfd_dev
> > *dev,
> > >   {
> > >     uint16_t source_id, client_id, ring_id, pasid, vmid;
> > >     uint32_t context_id0, context_id1;
> > > -   uint8_t sq_int_enc, sq_int_errtype, sq_int_priv;
> > > +   uint8_t sq_int_enc, sq_int_errtype;
> > >     struct kfd_vm_fault_info info = {0};
> > >     struct kfd_hsa_memory_exception_data exception_data;
> > >
> > > @@ -348,13 +348,6 @@ static void event_interrupt_wq_v11(struct kfd_dev
> > *dev,
> > >                             break;
> > >                     case SQ_INTERRUPT_WORD_ENCODING_INST:
> > >                             print_sq_intr_info_inst(context_id0,
> > context_id1);
> > > -                           sq_int_priv = REG_GET_FIELD(context_id0,
> > > -
> >       SQ_INTERRUPT_WORD_WAVE_CTXID0, PRIV);
> > > -                           /*if (sq_int_priv &&
> > (kfd_set_dbg_ev_from_interrupt(dev, pasid,
> > > -
> >       KFD_CTXID0_DOORBELL_ID(context_id0),
> > > -
> >       KFD_CTXID0_TRAP_CODE(context_id0),
> > > -                                           NULL, 0)))
> > > -                                   return;*/
> > >                             break;
> > >                     case SQ_INTERRUPT_WORD_ENCODING_ERROR:
> > >                             print_sq_intr_info_error(context_id0,
> > context_id1);