linux-kernel - Re: [PATCH] x86 byteorder.h: use __asm__/__inline_

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Date:	Sat, 27 Dec 2008 20:24:30 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Mike Frysinger <vapier@...too.org>,
	tglx@...utronix.de, mingo@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86 byteorder.h: use __asm__/__inline__ for userspace

On Sat, Dec 27, 2008 at 11:15:01AM -0800, H. Peter Anvin wrote:
> Sam Ravnborg wrote:
> > On Sat, Dec 27, 2008 at 10:58:11AM -0800, H. Peter Anvin wrote:
> >> Sam Ravnborg wrote:
> >>> I wnet with the scripted conversion for now.
> >>> If that does not fly we can come back to this proposal.
> >>>
> >>> What I like most with the auto conversion is that we avoid
> >>> adding yet another special rule about how to do stuff in exported headers.
> >>>
> >> Indeed, and being keyword conversion, it's independent of context, at
> >> least as long as one doesn't have too many run-ins with weird uses of
> >> the # and ## preprocessor operators, which are a *lot* easier to rule
> >> out globally.
> > 
> > Speaking of what we want to use in exported headers.
> > What is the recommendation with respect to uint32_t and friends?
> > To my best knowledge they are banned in exported headers as they
> > are not part of the kernel namespace and I see few users too.
> > But is this something we should check for?
> 
> I personally would not be upset if we auto-changed {su}{8,16,32,64},
> [u]int_{8,16,32,64}_t and bool into the appropriate __{su}{8,16,32,64}
> types and _Bool.  I think the upside is way bigger than the potential
> downside.

I was only thinking of a warning so we could have this part cleaned up.
It is for the most part a trivial task to do for a volunteer.

I could also see some sporadic use of u_int32_t - dunno where it comes from.
But looks wrong to me.

	Sam
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