s390/kvm: use union tod_clock

Use union tod_clock and get rid of the kvm specific struct
kvm_s390_tod_clock_ext which apparently was introduced for the same
purpose.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 759bbc0..2f09e9d 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -165,12 +165,6 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
        { NULL }
 };
 
-struct kvm_s390_tod_clock_ext {
-       __u8 epoch_idx;
-       __u64 tod;
-       __u8 reserved[7];
-} __packed;
-
 /* allow nested virtualization in KVM (if enabled by user space) */
 static int nested;
 module_param(nested, int, S_IRUGO);
@@ -1166,17 +1160,17 @@ static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
 static void kvm_s390_get_tod_clock(struct kvm *kvm,
                                   struct kvm_s390_vm_tod_clock *gtod)
 {
-       struct kvm_s390_tod_clock_ext htod;
+       union tod_clock clk;
 
        preempt_disable();
 
-       get_tod_clock_ext((char *)&htod);
+       store_tod_clock_ext(&clk);
 
-       gtod->tod = htod.tod + kvm->arch.epoch;
+       gtod->tod = clk.tod + kvm->arch.epoch;
        gtod->epoch_idx = 0;
        if (test_kvm_facility(kvm, 139)) {
-               gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
-               if (gtod->tod < htod.tod)
+               gtod->epoch_idx = clk.ei + kvm->arch.epdx;
+               if (gtod->tod < clk.tod)
                        gtod->epoch_idx += 1;
        }
 
@@ -3867,18 +3861,18 @@ void kvm_s390_set_tod_clock(struct kvm *kvm,
                            const struct kvm_s390_vm_tod_clock *gtod)
 {
        struct kvm_vcpu *vcpu;
-       struct kvm_s390_tod_clock_ext htod;
+       union tod_clock clk;
        int i;
 
        mutex_lock(&kvm->lock);
        preempt_disable();
 
-       get_tod_clock_ext((char *)&htod);
+       store_tod_clock_ext(&clk);
 
-       kvm->arch.epoch = gtod->tod - htod.tod;
+       kvm->arch.epoch = gtod->tod - clk.tod;
        kvm->arch.epdx = 0;
        if (test_kvm_facility(kvm, 139)) {
-               kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx;
+               kvm->arch.epdx = gtod->epoch_idx - clk.ei;
                if (kvm->arch.epoch > gtod->tod)
                        kvm->arch.epdx -= 1;
        }