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

[Daniel Vetter]

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@xxxxxxxxx> 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@xxxxxxxxx>
> > Acked-by: Ben Skeggs <bskeggs@xxxxxxxxxx>

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