On Tue, Jan 11, 2022 at 08:55:58PM -0800, Martinez, Ricardo wrote:

On 12/16/2021 3:08 AM, Ilpo Järvinen wrote:

quoted

On Mon, 6 Dec 2021, Ricardo Martinez wrote:

quoted

quoted

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

...

quoted

quoted

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

...

quoted

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