Re: [PATCH] x86-64, rwsem: Avoid store forwarding hazzard in __downgrade_write

[Avi Kivity]

On 02/13/2010 10:16 AM, H. Peter Anvin wrote:
> On 02/12/2010 11:13 PM, Avi Kivity wrote:
>    
> > +#ifndef CONFIG_X86_64
> > +		       "i" (-RWSEM_WAITING_BIAS)
> > +#else
> > +		       "r" (-RWSEM_WAITING_BIAS)
> >   #endif
> > +		     : "memory", "cc");
> >      
> Using an "er" constraint here should work on both architectures.
>
>    

Right.  v2 to follow.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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