linux-kernel - Re: [PATCH] x86: generic versions of find_first_(zero

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080331102240.086a93e4@extreme>
Date:	Mon, 31 Mar 2008 10:22:40 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Alexander van Heukelum <heukelum@...lshack.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: generic versions of find_first_(zero_)bit, convert
 i386

On Mon, 31 Mar 2008 19:15:06 +0200
Alexander van Heukelum <heukelum@...lshack.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@...tmail.fm>
> 

Size isn't everything, what is the performance difference?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/