linux-kernel - Re: linux-next: build warning in Linus'tree

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Date:	Tue, 25 May 2010 23:41:16 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-kernel@...r.kernel.org, linux-next@...r.kernel.org,
	Linus <torvalds@...ux-foundation.org>
Subject: Re: linux-next: build warning in Linus'tree

On Wed, 26 May 2010 08:29:45 +0200 Joakim Tjernlund <joakim.tjernlund@...nsmode.se> wrote:

> Stephen Rothwell <sfr@...b.auug.org.au> wrote on 2010/05/26 06:09:00:
> >
> > Hi Andrew,
> >
> > On Tue, 25 May 2010 18:20:40 -0700 Andrew Morton <akpm@...ux-foundation.org> wrote:
> > >
> > > hmpf.  Does this fix?
> >
> > No.
> >
> > The problem is that __LITTLE_ENDIAN is only defined in
> > linux/byteorder/little_endian.h which is only included by little endian
> > architectures ...
> 
> Ah, not sure how to fix this ATM. Perhaps best to revert
>    crc32: use __BYTE_ORDER macro for endian detection
> for now.

yup.

> I suspect fixing this entails moving all endian tests to #if __BYTE_ORDER ...
> and then always define both __LITTLE_ENDIAN and __BIG_ENDIAN

Yes we can't define __LITTLE_ENDIAN to anything on big-endian without
breaking lots of other things.

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