gcc44 build fix

gcc44 build fix

[Gerd Hoffmann]

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  Hi,

Broken constrain in inline asm.  Bytewise access works with a, b, c, d
registers only, thus "r" is wrong, it must be "q".  gcc 4.4 tries to use
the si register, which doesn't work and thus fails the build.

please apply,
  Gerd

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diff -up xen/arch/x86/hvm/vpic.c~ xen/arch/x86/hvm/vpic.c
--- xen/arch/x86/hvm/vpic.c~	2009-02-24 10:59:27.000000000 +0100
+++ xen/arch/x86/hvm/vpic.c	2009-02-24 12:20:46.000000000 +0100
@@ -56,7 +56,7 @@ static int vpic_get_priority(struct hvm_
 
     /* prio = ffs(mask ROR vpic->priority_add); */
     asm ( "ror %%cl,%b1 ; bsf %1,%0"
-          : "=r" (prio) : "r" ((uint32_t)mask), "c" (vpic->priority_add) );
+          : "=r" (prio) : "q" ((uint32_t)mask), "c" (vpic->priority_add) );
     return prio;
 }
 

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