linux-kernel - Re: [PATCH net-next v5 10/13] mm: page_frag: introduce prepare/probe/commit API

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Date: Thu, 30 May 2024 17:21:45 +0800
From: Yunsheng Lin <linyunsheng@...wei.com>
To: <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Alexander Duyck
	<alexander.duyck@...il.com>, Andrew Morton <akpm@...ux-foundation.org>,
	<linux-mm@...ck.org>
Subject: Re: [PATCH net-next v5 10/13] mm: page_frag: introduce
 prepare/probe/commit API

On 2024/5/28 20:56, Yunsheng Lin wrote:

> +#define page_frag_alloc_probe(nc, offset, fragsz, va)			\
> +({									\
> +	struct page *__page = NULL;					\
> +									\
> +	VM_BUG_ON(!*(fragsz));						\

The above above marco seems to need to include mmdebug.h explicitly
to avoid compile error for x86 system.


> +	if (likely((nc)->remaining >= *(fragsz)))			\
> +		__page = virt_to_page(__page_frag_alloc_probe(nc,	\
> +							      offset,	\
> +							      fragsz,	\
> +							      va));	\
> +									\
> +	__page;								\
> +})