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authorMichael S. Tsirkin <mst@redhat.com>2009-06-29 22:24:14 +0300
committerAvi Kivity <avi@redhat.com>2009-09-10 08:33:04 +0300
commitd5c2dcc36aaf4dfdf9e01513493c71d71715f817 (patch)
tree753b37e9f9530ed09670a89c94d31effb630a6c7 /virt/kvm/coalesced_mmio.c
parent69fa2d78653918d200220ca62d44715827e6d617 (diff)
downloadlinaro-lsk-d5c2dcc36aaf4dfdf9e01513493c71d71715f817.tar.gz
KVM: switch coalesced mmio changes to slots_lock
switch coalesced mmio slots_lock. slots_lock is already taken for read everywhere, so we only need to take it for write when changing zones. This is in preparation to removing in_range and kvm->lock around it. [avi: fix build] Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/coalesced_mmio.c')
-rw-r--r--virt/kvm/coalesced_mmio.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 397f4193669..b40946c1237 100644
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -115,16 +115,16 @@ int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,
if (dev == NULL)
return -EINVAL;
- mutex_lock(&kvm->lock);
+ down_write(&kvm->slots_lock);
if (dev->nb_zones >= KVM_COALESCED_MMIO_ZONE_MAX) {
- mutex_unlock(&kvm->lock);
+ up_write(&kvm->slots_lock);
return -ENOBUFS;
}
dev->zone[dev->nb_zones] = *zone;
dev->nb_zones++;
- mutex_unlock(&kvm->lock);
+ up_write(&kvm->slots_lock);
return 0;
}
@@ -138,7 +138,7 @@ int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm,
if (dev == NULL)
return -EINVAL;
- mutex_lock(&kvm->lock);
+ down_write(&kvm->slots_lock);
i = dev->nb_zones;
while(i) {
@@ -156,7 +156,7 @@ int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm,
i--;
}
- mutex_unlock(&kvm->lock);
+ up_write(&kvm->slots_lock);
return 0;
}