[PATCH][v2] atomic_dec_if_positive sign extension fix

[Gabriel Paubert]

On Tue, Jan 16, 2007 at 12:16:05PM -0600, Robert Jennings wrote:
> Paul,
> 
> Here is v.2 for the patch. 
> Please apply for 2.6.20.  If an atomic counter is explicitly set to a
> negative value the atomic_dec_if_positive function will decrement and
> store the next smallest value in the atomic counter contrary to it's
> intended operation.
> 
> The comparison to determine if the decrement will make the result
> negative is done by the "addic." operation which operates on a 64-bit
> value.  I've changed the addic to an addi (changing "=&r" to "=&g" in

I think the proper constraint is "=&b". 

	Gabriel