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Date: Fri, 20 Aug 2004 09:58:39 -0700
From: "David S. Miller" <davem@redhat.com>
To: Paul Mackerras <paulus@samba.org>
Cc: akpm@osdl.org, olof@austin.ibm.com, anton@samba.org,
       linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PPC64 Better little-endian bitops
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On Fri, 20 Aug 2004 17:05:26 +1000
Paul Mackerras <paulus@samba.org> wrote:

> Below patch reuses the big-endian bitops for the little endian ones, and
> moves the ext2_{set,clear}_bit_atomic functions to be truly atomic
> instead of lock based.
> 
> This requires that the bitmaps passed to the ext2_* bitop functions
> are 8-byte aligned.  I have been assured that they will be 512-byte or
> 1024-byte aligned, and sparc and ppc32 also impose an alignment
> requirement on the bitmap.

Nice.  I noticed this trick before in the s390 headers.
I'll do this on sparc64 too...