linux-kernel - Re: [Bugme-new] [Bug 7602] New: Failure on compilation: include/asm/bitops.h:122: error: inconsistent operand constraints in an `asm' in nfs_access_add

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Message-Id: <200611302322.00167.ak@suse.de>
Date:	Thu, 30 Nov 2006 23:22:00 +0100
From:	Andi Kleen <ak@...e.de>
To:	Andrew Morton <akpm@...l.org>
Cc:	bugme-daemon@...zilla.kernel.org, linux-kernel@...r.kernel.org,
	mjw99@...ac.uk
Subject: Re: [Bugme-new] [Bug 7602] New: Failure on compilation: include/asm/bitops.h:122: error: inconsistent operand constraints in an `asm' in nfs_access_add_cache()


> 
> static __inline__ int __test_and_set_bit(int nr, volatile void * addr)
> {
> 	int oldbit;
> 
> 	__asm__(
> 		"btsl %2,%1\n\tsbbl %0,%0"
> 		:"=r" (oldbit),"+m" (ADDR)
> 		:"dIr" (nr));
> 	return oldbit;
> }
> 
> explodes with gcc-3.4.4.

Known issue.  The new form is correct and needed, but the old gcc doesn't accept
it. I haven't gotten a form that is both and correct and works on the old compiler
out of the gcc hackers I asked.

Probably need to #ifdef it.

-Andi
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