netdev - Re: [RFC PATCH] kernel: add byteorder macros with alignment fixups

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <47E2C420.5050008@zytor.com>
Date:	Thu, 20 Mar 2008 13:08:00 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Harvey Harrison <harvey.harrison@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-netdev <netdev@...r.kernel.org>
Subject: Re: [RFC PATCH] kernel: add byteorder macros with alignment fixups

Harvey Harrison wrote:
> A common pattern in the kernel (especially networking) is:
> 
> le32_to_cpu(get_unaligned((__le32 *)x));
> 
> Repeat for various combinations of le/be and 64/32/16 bit.  Add
> a variant that operates on possibly unaligned pointers to
> byteorder/generic.h
> 

This should go in <asm-generic/*> since on some architectures this can 
be done significantly faster than the chained pattern, since you can get 
the reordering for "free".  Thus, architectures should be able to 
override the generic.

	-hpa
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html