linux-kernel - Re: [PATCH v2 2/2] gpu: drm: nouveau: Use list_{next/prev}_entry instead of list_entry

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Message-ID: <20180326141150.GU14155@phenom.ffwll.local>
Date:   Mon, 26 Mar 2018 16:11:50 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Chris Wilson <chris@...is-wilson.co.uk>
Cc:     Ben Skeggs <bskeggs@...hat.com>,
        Arushi Singhal <arushisinghal19971997@...il.com>,
        David Airlie <airlied@...ux.ie>,
        nouveau <nouveau@...ts.freedesktop.org>,
        linux-kernel@...r.kernel.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        daniel.vetter@...el.com
Subject: Re: [PATCH v2 2/2] gpu: drm: nouveau: Use list_{next/prev}_entry
 instead of list_entry

On Mon, Mar 26, 2018 at 01:43:30PM +0100, Chris Wilson wrote:
> Quoting Ben Skeggs (2018-03-26 13:34:54)
> > On Mon, Mar 26, 2018 at 4:01 AM, Arushi Singhal
> > <arushisinghal19971997@...il.com> wrote:
> > > It's better to use list_entry instead of list_{next/prev}_entry
> > > as it makes the code more clear to read.
> > > This patch replace list_entry with list_{next/prev}_entry.
> > >
> > > Signed-off-by: Arushi Singhal <arushisinghal19971997@...il.com>
> > Acked-by: Ben Skeggs <bskeggs@...hat.com>

Applied, thanks for ack&patch.

> > 
> > > ---
> > >  drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > > index e4c8d31..81c3567 100644
> > > --- a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > > +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
> > > @@ -134,7 +134,7 @@ nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
> > >                                nvkm_volt_map(volt, volt->max2_id, clk->temp));
> > >
> > >         for (cstate = start; &cstate->head != &pstate->list;
> > > -            cstate = list_entry(cstate->head.prev, typeof(*cstate), head)) {
> > > +            cstate = list_prev_entry(cstate, head)) {
> 
> This loop could be written as:
> 
> 	cstate = start; /* cstate looks redundant here, just use start? */
> 	list_for_each_entry_from_reverse(cstate, &pstate->list, head)

Yeah, sounds like a good follow-up patch.
-Daniel

> 
> > >                 if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
> > >                         break;
> > >         }
> > > --
> > > 2.7.4
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

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