KVM: x86: Simplify kvm timer handler

The vcpu reference of a kvm_timer can't become NULL while the timer is
valid, so drop this redundant test. This also makes it pointless to
carry a separate __kvm_timer_fn, fold it into kvm_timer_fn.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 4 insertions, 22 deletions

diff --git a/arch/x86/kvm/timer.c b/arch/x86/kvm/timer.c
index ae432ea1cd83..6b85cc647f34 100644
--- a/arch/x86/kvm/timer.c
+++ b/arch/x86/kvm/timer.c
@@ -18,9 +18,10 @@
 #include <linux/atomic.h>
 #include "kvm_timer.h"
 
-static int __kvm_timer_fn(struct kvm_vcpu *vcpu, struct kvm_timer *ktimer)
+enum hrtimer_restart kvm_timer_fn(struct hrtimer *data)
 {
-        int restart_timer = 0;
+        struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
+        struct kvm_vcpu *vcpu = ktimer->vcpu;
         wait_queue_head_t *q = &vcpu->wq;
 
         /*
@@ -40,26 +41,7 @@ static int __kvm_timer_fn(struct kvm_vcpu *vcpu, struct kvm_timer *ktimer)
 
         if (ktimer->t_ops->is_periodic(ktimer)) {
                 hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
-                restart_timer = 1;
-        }
-
-        return restart_timer;
-}
-
-enum hrtimer_restart kvm_timer_fn(struct hrtimer *data)
-{
-        int restart_timer;
-        struct kvm_vcpu *vcpu;
-        struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
-
-        vcpu = ktimer->vcpu;
-        if (!vcpu)
-                return HRTIMER_NORESTART;
-
-        restart_timer = __kvm_timer_fn(vcpu, ktimer);
-        if (restart_timer)
                 return HRTIMER_RESTART;
-        else
+        } else
                 return HRTIMER_NORESTART;
 }
-