linux-kernel - Re: [PATCH 21/21] posix_types: Remove fd

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Date:	Wed, 08 Feb 2012 08:57:51 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	David Howells <dhowells@...hat.com>
CC:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 21/21] posix_types: Remove fd_set macros

On 02/08/2012 04:20 AM, David Howells wrote:
> H. Peter Anvin <hpa@...or.com> wrote:
> 
>> However, they are nothing but standard (nonatomic) bit operations, and
>> we already have optimized versions of bit operations in the kernel.
>> We can't include <linux/bitops.h> in <asm/posix_types.h> but we can
>> move the definitions to <linux/time.h> and define them there in terms
>> of standard kernel bitops.
> 
> Why linux/time.h?  Why not linux/poll.h?  That would seem a more appropriate
> place for them.
> 
> David

If you look in the file a few lines below the patch, the reason should
be obvious.

Anyway, select() paraphernalia goes in <sys/time.h> (as opposed to
<time.h>), poll() paraphernalia goes in <sys/poll.h>, and the linux/*
files mimics that.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.


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