linux-kernel - Re: [PATCH 8/9] define global BIT macro

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Date:	Sat, 18 Aug 2007 11:15:25 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Jiri Slaby <jirislaby@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, source@...sta.com,
	dougthompson@...ssion.com, bluesmoke-devel@...ts.sourceforge.net,
	dtor@...l.ru, linux-input@...ey.karlin.mff.cuni.cz,
	netdev@...r.kernel.org, James.Bottomley@...elEye.com,
	linux-scsi@...r.kernel.org, gtolstolytkin@...mvista.com,
	vitalywool@...il.com, dsaxena@...xity.net, ralf@...ux-mips.org,
	linux-mips@...ux-mips.org, mchehab@...radead.org,
	video4linux-list@...hat.com, jbenc@...e.cz,
	flamingice@...rmilk.net, linux-wireless@...r.kernel.org
Subject: Re: [PATCH 8/9] define global BIT macro

Jiri Slaby wrote:
> Randy Dunlap napsal(a):
>> On Sat, 18 Aug 2007 11:44:12 +0200 (CEST) Jiri Slaby wrote:
>>
>>> define global BIT macro
>>>
>>> move all local BIT defines to the new globally define macro.
>>>
>>> Signed-off-by: Jiri Slaby <jirislaby@...il.com>
>>>
>>> ---
>>>
>>>  include/linux/bitops.h                      |    1 +
>>>  include/video/sstfb.h                       |    1 -
>>>  include/video/tdfx.h                        |    2 --
>>>  net/mac80211/ieee80211_i.h                  |    2 --
>>>  18 files changed, 1 insertions(+), 37 deletions(-)
>>>
>>> diff --git a/include/linux/bitops.h b/include/linux/bitops.h
>>> index 3255b06..a57b81f 100644
>>> --- a/include/linux/bitops.h
>>> +++ b/include/linux/bitops.h
>>> @@ -3,6 +3,7 @@
>>>  #include <asm/types.h>
>>>  
>>>  #ifdef	__KERNEL__
>>> +#define BIT(nr)			(1UL << (nr))
>>>  #define BIT_MASK(nr)		(1UL << ((nr) % BITS_PER_LONG))
>>>  #define BIT_WORD(nr)		((nr) / BITS_PER_LONG)
>>>  #define BITS_TO_TYPE(nr, t)	(((nr)+(t)-1)/(t))
>>
>> So users of the BIT() macro in include/linux/input.h can be
>> changed to use the global BIT_MASK() macro...
>> and the former can be removed.
> 
> I'm afraid I don't understand you. Maybe, you are writing about changes done in
> patch no. 7 [1], which didn't go through to the lkml?
> 
> [1]
> http://www.fi.muni.cz/~xslaby/sklad/07-get-rid-of-input-bit-duplicate-defines.patch

Exactly.  Thanks.

-- 
~Randy
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