From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: [PATCH] Add irqdevice interface + userint implementation
Date: Sun, 08 Apr 2007 13:23:15 +0300 [thread overview]
Message-ID: <4618C293.8030902@qumranet.com> (raw)
In-Reply-To: <20070408095853.GA31284-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Christoph Hellwig wrote:
>> +/*----------------------------------------------------------------------
>> + * optimized bitarray object - works like bitarrays in bitops, but uses
>> + * a summary field to accelerate lookups. Assumes external locking
>> + *---------------------------------------------------------------------*/
>> +
>> +struct bitarray {
>> + unsigned long summary; /* 1 per word in pending */
>> + unsigned long pending[NR_IRQ_WORDS];
>> +};
>> +
>>
> This should go into a separate header, probably even in include/linux/
>
It's limited to BITS_PER_LONG * BITS_PER_LONG bits (1K or 4K, depending
on arch). Do you see any potential users?
Making it generic would be difficult in C without preprocessor abuse.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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next prev parent reply other threads:[~2007-04-08 10:23 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-05 18:53 [PATCH] Add irqdevice interface + userint implementation Gregory Haskins
2007-04-05 21:38 ` Fwd: " Gregory Haskins
[not found] ` <4614FF5C.BA47.005A.0-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
2007-04-08 6:47 ` Avi Kivity
[not found] ` <46189005.2090609-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-04-09 18:36 ` Gregory Haskins
[not found] ` <461A415C.BA47.005A.0-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
2007-04-10 7:52 ` Avi Kivity
[not found] ` <461B4241.5030101-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-04-10 11:36 ` Gregory Haskins
[not found] ` <461B3E61.BA47.005A.0-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
2007-04-10 12:01 ` Avi Kivity
[not found] ` <461B7C81.7040102-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-04-10 14:20 ` Gregory Haskins
[not found] ` <461B64E4.BA47.005A.0-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
2007-04-10 14:46 ` Avi Kivity
[not found] ` <461BA363.5080308-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-04-10 15:39 ` Gregory Haskins
2007-04-10 15:53 ` Fwd: " Gregory Haskins
[not found] ` <461B7AC6.BA47.005A.0-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
2007-04-10 16:11 ` Avi Kivity
[not found] ` <461BB738.7040206-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-04-10 17:58 ` Gregory Haskins
[not found] ` <461B7755.BA47.005A.0-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
2007-04-10 16:08 ` Avi Kivity
2007-04-08 9:58 ` Christoph Hellwig
[not found] ` <20070408095853.GA31284-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2007-04-08 10:23 ` Avi Kivity [this message]
[not found] ` <4618C293.8030902-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-04-08 10:33 ` Christoph Hellwig
2007-04-09 14:53 ` Gregory Haskins
-- strict thread matches above, loose matches on Subject: below --
2007-04-09 20:27 Gregory Haskins
[not found] ` <461A5B6C.BA47.005A.0-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
2007-04-10 7:33 ` Avi Kivity
2007-04-10 8:23 ` Christoph Hellwig
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