[Xen-changelog] [xen-unstable] x86, hvm: gcc44 build fix.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1235919487 0
# Node ID e5c696aaf2a6e8805231c0c0f1414560262e7005
# Parent  226031d62fc53d92df1aa7ba5565e887fa925318
x86, hvm: gcc44 build fix.

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.

From: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vpic.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 226031d62fc5 -r e5c696aaf2a6 xen/arch/x86/hvm/vpic.c
--- a/xen/arch/x86/hvm/vpic.c   Sun Mar 01 14:50:04 2009 +0000
+++ b/xen/arch/x86/hvm/vpic.c   Sun Mar 01 14:58:07 2009 +0000
@@ -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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