From 217fc9cfca21a0bc2f4246183ebd8ee9863b019d Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Thu, 26 Aug 2010 13:38:03 +0300 Subject: [PATCH] KVM: Fix build error due to 64-bit division in nsec_to_cycles() Use do_div() instead. Signed-off-by: Avi Kivity Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/x86.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) 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 #include #include +#include #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) -- 2.20.1