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>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bc96ac9ed912..bdba1d09a97e 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 int kvm_tsc_changes_freq(void)
 
 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)