linux-kernel - Re: Re: [PATCH] futex: bugfix for futex-key conflict when futex use hugepage

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Message-ID: <OF7A810108.AA9BB6C1-ON48257B6D.000A1424-48257B6D.000B1EC6@zte.com.cn>
Date:	Thu, 16 May 2013 10:00:54 +0800
From:	zhang.yi20@....com.cn
To:	Darren Hart <dvhart@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, Mel Gorman <mgorman@...e.de>,
	"'Ingo Molnar'" <mingo@...nel.org>,
	"'Peter Zijlstra'" <peterz@...radead.org>,
	"'Thomas Gleixner'" <tglx@...utronix.de>,
	Zhang Yi <wetpzy@...il.com>
Subject: Re: Re: [PATCH] futex: bugfix for futex-key conflict when futex use
 hugepage



Darren Hart <dvhart@...ux.intel.com> wrote on 2013/05/16 09:30:31:

>
> pgoff_t is an unsigned long, and page_to_pfn() returns an unsigned long.
> Since compound_idx can be assigned from page_to_pfn() and it is added
> with index in the return value, unsigned long seems like a better choice
> to me. Is there a specific reason you prefer an int? It might be "fine"
> but it is likely to raise eyebrows whenever someone read through it.
>
No other specific  reason. I just think that int is enough.

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