From: Stephen Hemminger <shemminger@vyatta.com>
To: Alexander van Heukelum <heukelum@mailshack.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: generic versions of find_first_(zero_)bit, convert i386
Date: Mon, 31 Mar 2008 10:22:40 -0700 [thread overview]
Message-ID: <20080331102240.086a93e4@extreme> (raw)
In-Reply-To: <20080331171506.GA24017@mailshack.com>
On Mon, 31 Mar 2008 19:15:06 +0200
Alexander van Heukelum <heukelum@mailshack.com> wrote:
> Generic versions of __find_first_bit and __find_first_zero_bit
> are introduced as simplified versions of __find_next_bit and
> __find_next_zero_bit. Their compilation and use are guarded by
> a new config variable GENERIC_FIND_FIRST_BIT.
>
> The generic versions of find_first_bit and find_first_zero_bit
> are implemented in terms of the newly introduced __find_first_bit
> and __find_first_zero_bit.
>
> This patch also converts i386 to the generic functions. The text
> size shrinks slightly due to uninlining of the find_*_bit functions.
>
> text data bss dec hex filename
> 4764939 480324 622592 5867855 59894f vmlinux (i386 defconfig before)
> 4764645 480324 622592 5867561 598829 vmlinux (i386 defconfig after)
>
> Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
>
Size isn't everything, what is the performance difference?
next prev parent reply other threads:[~2008-03-31 17:22 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-31 17:15 [PATCH] x86: generic versions of find_first_(zero_)bit, convert i386 Alexander van Heukelum
2008-03-31 17:22 ` Stephen Hemminger [this message]
2008-03-31 19:38 ` Alexander van Heukelum
2008-03-31 21:58 ` Andi Kleen
2008-04-01 8:47 ` Ingo Molnar
2008-04-01 9:46 ` Alexander van Heukelum
2008-04-01 15:41 ` [PATCH] x86: switch x86_64 to generic find_first_bit Alexander van Heukelum
2008-04-01 15:42 ` [PATCH] x86: optimize find_first_bit for small bitmaps Alexander van Heukelum
2008-04-01 15:47 ` [PATCH] x86: remove x86-specific implementations of find_first_bit Alexander van Heukelum
2008-04-03 9:34 ` Alexander van Heukelum
2008-04-04 8:47 ` Ingo Molnar
2008-04-06 17:03 ` [PATCH] x86: generic versions of find_first_(zero_)bit, convert i386 dean gaudet
2008-04-06 18:51 ` Alexander van Heukelum
2008-04-06 20:22 ` dean gaudet
2008-04-07 8:43 ` Ingo Molnar
2008-04-07 10:25 ` Alexander van Heukelum
2008-04-18 20:18 ` Alternative implementation of the generic __ffs Alexander van Heukelum
2008-04-18 23:46 ` dean gaudet
2008-04-19 0:09 ` Harvey Harrison
2008-04-19 0:20 ` dean gaudet
2008-04-19 0:58 ` Joe Perches
2008-04-19 1:04 ` Harvey Harrison
2008-04-19 1:11 ` dean gaudet
2008-04-19 2:55 ` Joe Perches
2008-04-19 4:13 ` dean gaudet
2008-04-19 10:05 ` Mikael Pettersson
2008-04-19 12:10 ` Alexander van Heukelum
2008-04-19 18:17 ` Joe Perches
2008-04-19 20:26 ` Alexander van Heukelum
2008-04-19 22:29 ` Matti Aarnio
2008-04-20 3:06 ` Joe Perches
2008-04-20 8:42 ` Alexander van Heukelum
2008-04-20 12:31 ` Matti Aarnio
2008-04-21 11:43 ` Alexander van Heukelum
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