kvm: bios: prevent compiler from caching cpu count while starting up smp

Other cpus are updating the count in parallel; if we get bad timing we might
not notice them starting up and hang.

Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/kvm/bios/rombios32.c b/kvm/bios/rombios32.c
index cceaedef0..321563dac 100755
--- a/kvm/bios/rombios32.c
+++ b/kvm/bios/rombios32.c
@@ -633,7 +633,7 @@ void smp_probe(void)
 #ifndef BX_QEMU
         delay_ms(10);
 #else
-	while (cmos_readb(0x5f) + 1 != smp_cpus)
+	while (cmos_readb(0x5f) + 1 != readw(&smp_cpus))
 	    ;
 #endif
     }