From: Keir Fraser <keir.fraser@citrix.com>
Date: Sun, 1 Mar 2009 14:58:07 +0000 (+0000)
Subject: x86, hvm: gcc44 build fix.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~13996^2
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b16ca0e441f3f1dadd9e6b610f670099e74e50d5;p=xen.git

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@redhat.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/hvm/vpic.c b/xen/arch/x86/hvm/vpic.c
index 30486ce935..cf43f1e544 100644
--- a/xen/arch/x86/hvm/vpic.c
+++ b/xen/arch/x86/hvm/vpic.c
@@ -56,7 +56,7 @@ static int vpic_get_priority(struct hvm_hw_vpic *vpic, uint8_t mask)
 
     /* 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;
 }