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Date:   Wed, 12 Jan 2022 13:40:10 +0200
From:   Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To:     "Martinez, Ricardo" <ricardo.martinez@linux.intel.com>
Cc:     Ilpo =?iso-8859-1?Q?J=E4rvinen?= <ilpo.jarvinen@linux.intel.com>,
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Subject: Re: [PATCH net-next v3 01/12] net: wwan: t7xx: Add control DMA
 interface
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References: <20211207024711.2765-1-ricardo.martinez@linux.intel.com>
 <20211207024711.2765-2-ricardo.martinez@linux.intel.com>
 <a6325ef-e06e-c236-9d23-42fdb8b62747@linux.intel.com>
 <2b21bfa5-4b18-d615-b6ab-09ad97d73fe4@linux.intel.com>
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Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
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On Tue, Jan 11, 2022 at 08:55:58PM -0800, Martinez, Ricardo wrote:
> On 12/16/2021 3:08 AM, Ilpo J?rvinen wrote:
> > On Mon, 6 Dec 2021, Ricardo Martinez wrote:

> > > +	if (req->entry.next == &ring->gpd_ring)
> > > +		return list_first_entry(&ring->gpd_ring, struct cldma_request, entry);
> > > +
> > > +	return list_next_entry(req, entry);

...

> > > +	if (req->entry.prev == &ring->gpd_ring)
> > > +		return list_last_entry(&ring->gpd_ring, struct cldma_request, entry);
> > > +
> > > +	return list_prev_entry(req, entry);

...

> > Wouldn't these two seems generic enough to warrant adding something like
> > list_next/prev_entry_circular(...) to list.h?
> 
> Agree, in the upcoming version I'm planning to include something like this
> to list.h as suggested:

I think you mean for next and prev, i.o.w. two helpers, correct?

> #define list_next_entry_circular(pos, ptr, member) \

> ?? ?((pos)->member.next == (ptr) ? \

I believe this is list_entry_is_head().

> ?? ?list_first_entry(ptr, typeof(*(pos)), member) : \
> ?? ?list_next_entry(pos, member))

-- 
With Best Regards,
Andy Shevchenko