linux-kernel - Re: [PATCH v3 01/24] mm: enhance region_is_ram() to region

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Date:	Thu, 30 Jul 2015 13:44:44 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	"Luis R. Rodriguez" <mcgrof@...e.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>, linux-arch@...r.kernel.org,
	"Kani, Toshimitsu" <toshi.kani@...com>,
	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Christoph Hellwig <hch@....de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 01/24] mm: enhance region_is_ram() to region_intersects()

On Thu, Jul 30, 2015 at 1:42 PM, Luis R. Rodriguez <mcgrof@...e.com> wrote:
> On Thu, Jul 30, 2015 at 12:53:45PM -0400, Dan Williams wrote:
>> diff --git a/include/linux/mm.h b/include/linux/mm.h
>> index 2e872f92dbac..84b05ebedb2d 100644
>> --- a/include/linux/mm.h
>> +++ b/include/linux/mm.h
>> @@ -369,7 +369,14 @@ static inline int put_page_unless_one(struct page *page)
>>  }
>>
>>  extern int page_is_ram(unsigned long pfn);
>> -extern int region_is_ram(resource_size_t phys_addr, unsigned long size);
>> +
>> +enum {
>> +     REGION_INTERSECTS,
>> +     REGION_DISJOINT,
>> +     REGION_MIXED,
>> +};
>> +
>
> Can you Kdoc'ify this? Part of the reason for the enum request was this
> could be then documented really well. The helper is documented but here
> you can go into more detail about each region intersection.

Given region_intersects() has its own kdoc I'd probably just say "See
region_intersects() for details".
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