KVM: Fix build error due to 64-bit division in nsec_to_cycles()
Use do_div() instead.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bc96ac9..bdba1d0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -56,6 +56,7 @@
#include <asm/i387.h>
#include <asm/xcr.h>
#include <asm/pvclock.h>
+#include <asm/div64.h>
#define MAX_IO_MSRS 256
#define CR0_RESERVED_BITS \
@@ -917,11 +918,15 @@
static inline u64 nsec_to_cycles(u64 nsec)
{
+ u64 ret;
+
WARN_ON(preemptible());
if (kvm_tsc_changes_freq())
printk_once(KERN_WARNING
"kvm: unreliable cycle conversion on adjustable rate TSC\n");
- return (nsec * __get_cpu_var(cpu_tsc_khz)) / USEC_PER_SEC;
+ ret = nsec * __get_cpu_var(cpu_tsc_khz);
+ do_div(ret, USEC_PER_SEC);
+ return ret;
}
void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data)