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Message-ID: <6c94f7b8-f553-1fce-f3f1-66cdead9e056@huawei.com>
Date:   Mon, 17 Jul 2023 20:33:05 +0800
From:   Yunsheng Lin <linyunsheng@...wei.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     Alexander Lobakin <aleksander.lobakin@...el.com>,
        Yunsheng Lin <yunshenglin0825@...il.com>,
        <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>,
        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>
Subject: Re: [PATCH v5 RFC 1/6] page_pool: frag API support for 32-bit arch
 with 64-bit DMA

On 2023/7/15 1:52, Jakub Kicinski wrote:
> On Fri, 14 Jul 2023 20:16:34 +0800 Yunsheng Lin wrote:
>>> I should have clarified that "types.h" should also include pure
>>> function declarations (and possibly static line wrappers like
>>> pure get/set functions which only need locally defined types).  
>>
>> So "types.h" is not supposed/allowed to include any header and
>> it can include any function declarations and static line wrappers
>> which do not depend on any other header? It means we need to forward
>> declaring a lot of 'struct' type for function declarations, right?
> 
> Only those used in function prototypes. Pointers in structures 
> are somewhat special and don't require fwd declaration.

I gave it a try to split it, and something as below come out:

https://github.com/gestionlin/linux/commit/11ac8c1959f7eda06a7b987903f37212b490b292

As the 'helpers.h' is not really useful when splitting, so only
'page_pool_types.h' is added, and include 'page_pool_types.h' in
'page_pool.h', does it make sense?

As Alexander is sending a new RFC for the similar problem, I think
we need to align on which is the better way to solve the problem.

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