From: Andrew Morton <akpm@osdl.org>
To: Andi Kleen <ak@suse.de>
Cc: bugme-daemon@bugzilla.kernel.org, linux-kernel@vger.kernel.org,
mjw99@ic.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()
Date: Thu, 30 Nov 2006 14:32:46 -0800 [thread overview]
Message-ID: <20061130143246.4a4bb970.akpm@osdl.org> (raw)
In-Reply-To: <200611302322.00167.ak@suse.de>
On Thu, 30 Nov 2006 23:22:00 +0100
Andi Kleen <ak@suse.de> wrote:
> >
> > 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.
Oh, thanks.
What does "d" do, btw? My gcc info page only covers "x86" and says only "`d' register"
(And, more importantly, where is the best description of gcc asm constraints?)
next prev parent reply other threads:[~2006-11-30 22:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200611302118.kAULIrxS011661@fire-2.osdl.org>
2006-11-30 21:37 ` Andrew Morton
2006-11-30 22:22 ` Andi Kleen
2006-11-30 22:32 ` Andrew Morton [this message]
2006-11-30 22:49 ` Andi Kleen
2006-11-30 23:08 ` Randy Dunlap
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