netdev - Re: [PATCH v5 RFC 1/6] page_pool: frag API support for 32-bit arch with 64-bit DMA

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Date: Sun, 9 Jul 2023 20:54:12 +0800
From: Yunsheng Lin <yunshenglin0825@...il.com>
To: Jakub Kicinski <kuba@...nel.org>, Yunsheng Lin <linyunsheng@...wei.com>
Cc: davem@...emloft.net, pabeni@...hat.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, Lorenzo Bianconi <lorenzo@...nel.org>,
 Alexander Duyck <alexander.duyck@...il.com>,
 Liang Chen <liangchen.linux@...il.com>,
 Alexander Lobakin <aleksander.lobakin@...el.com>,
 Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
 Eric Dumazet <edumazet@...gle.com>, Jesper Dangaard Brouer
 <hawk@...nel.org>, Ilias Apalodimas <ilias.apalodimas@...aro.org>,
 linux-rdma@...r.kernel.org
Subject: Re: [PATCH v5 RFC 1/6] page_pool: frag API support for 32-bit arch
 with 64-bit DMA

On 2023/7/8 8:01, Jakub Kicinski wrote:
> On Thu, 29 Jun 2023 20:02:21 +0800 Yunsheng Lin wrote:
>> -#include <linux/dma-direction.h>
>> +#include <linux/dma-mapping.h>
> 
> And the include is still here, too, eh..

In V4, it has:

--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -33,6 +33,7 @@ 
 #include <linux/mm.h> /* Needed by ptr_ring */
 #include <linux/ptr_ring.h>
 #include <linux/dma-direction.h>
+#include <linux/dma-mapping.h>

As dma_get_cache_alignment() defined in dma-mapping.h is used
here, so we need to include dma-mapping.h.

I though the agreement is that this patch only remove the
"#include <linux/dma-direction.h>" as we dma-mapping.h has included
dma-direction.h.

And Alexander will work on excluding page_pool.h from skbuff.h
https://lore.kernel.org/all/09842498-b3ba-320d-be8d-348b85e8d525@intel.com/

Did I miss something obvious here？ Or there is better way to do it
than the method discussed in the above thread?

>