linux-kernel - RE: [PATCH] ia64: fix build failure on fs/quota.c

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Date:	Thu, 26 Jul 2007 17:58:45 -0400
From:	Doug Chapman <doug.chapman@...com>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	linux-kernel@...r.kernel.org, linux-ia64@...r.kernel.org,
	vtaras@...nvz.org, "H. Peter Anvin" <hpa@...or.com>,
	Andi Kleen <ak@...e.de>
Subject: RE: [PATCH] ia64: fix build failure on fs/quota.c

On Thu, 2007-07-26 at 14:24 -0700, Luck, Tony wrote:
> This issue wandered off onto a long thread "build fix for x86_64" which
> died out without a final patch.  Here's the summary:
> 

Ahh, thanks, I had not seen that thread.


> > +#if defined(CONFIG_X86_64) || (defined(CONFIG_IA64) && defined(CONFIG_COMPAT))
> 
> It was pointed out that x86-64 also has a CONFIG_COMPAT, so the "right"
> #ifdef mess would be:
> 
> #if defined(CONFIG_COMPAT) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
> 
> But this was thought too ugly.  Andi Kleen proposed making a new CONFIG
> variable for this situation: CONFIG_COMPAT_FOR_U64_ALIGMNENT which could
> be set in ia64 and x86-64 Kconfig files with:
> 
> config COMPAT_FOR_U64_ALIGMNENT
> 	def_bool COMPAT
> 
> So the C-code would simply have:
> 
> #if defined(COMPAT_COMPAT_FOR_U64_ALIGMNENT)
> 
> (IIRC the syntax correctly).  Peter Anvin had some worries about future
> issues ... but I think he agreed that this was Ok.
> 
> Anyone still have any objections to this?

No objections here.  I just tried this patch and it does fix my ia64
build issue.  I agree it is a bit cleaner than the long #ifdef.

thanks,

- Doug


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