linux-kernel - Re: [patch] use __asm__ and __volatile_

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Message-ID: <20070618181101.GA15922@infradead.org>
Date:	Mon, 18 Jun 2007 19:11:01 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Mike Frysinger <vapier@...too.org>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
	rmk@....linux.org.uk
Subject: Re: [patch] use __asm__ and __volatile__ in i386/arm/s390 byteorder.h

On Mon, Jun 18, 2007 at 01:24:24AM +0200, Arnd Bergmann wrote:
> On Monday 18 June 2007, Arjan van de Ven wrote:
> > 
> > On Sun, 2007-06-17 at 18:33 -0400, Mike Frysinger wrote:
> > > This changes asm() to __asm__() and volatile to __volatile__ so that these
> > > headers can be used with gcc's -std=c99.
> > 
> > hmm but the kernel doesn't use -std=c99...
> 
> The byteorder headers are exported to user space through
> include/asm-generic/Kbuild.asm, and they are used by a number
> of other exported headers, so they should work with any
> gcc flags that a user might want to use.

No, they should not be exported and the headers using them
should be fixed to not require this.  Userspace has it's own
endianess handling already.

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