diff options
| author | Michael S. Tsirkin | 2009-06-29 21:24:26 +0200 |
|---|---|---|
| committer | Avi Kivity | 2009-09-10 07:33:05 +0200 |
| commit | 6c474694530f377507f9aca438c17206e051e6e7 (patch) | |
| tree | 11590f6cca777716e7dfbc16c2d98fc7d64c11b0 /virt/kvm/kvm_main.c | |
| parent | KVM: switch pit creation to slots_lock (diff) | |
| download | kernel-qcow2-linux-6c474694530f377507f9aca438c17206e051e6e7.tar.gz kernel-qcow2-linux-6c474694530f377507f9aca438c17206e051e6e7.tar.xz kernel-qcow2-linux-6c474694530f377507f9aca438c17206e051e6e7.zip | |
KVM: convert bus to slots_lock
Use slots_lock to protect device list on the bus. slots_lock is already
taken for read everywhere, so we only need to take it for write when
registering devices. This is in preparation to removing in_range and
kvm->lock around it.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
| -rw-r--r-- | virt/kvm/kvm_main.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index bbb4029d7c4d..0edc366ecf89 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2527,7 +2527,17 @@ struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, return NULL; } -void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) +void kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus, + struct kvm_io_device *dev) +{ + down_write(&kvm->slots_lock); + __kvm_io_bus_register_dev(bus, dev); + up_write(&kvm->slots_lock); +} + +/* An unlocked version. Caller must have write lock on slots_lock. */ +void __kvm_io_bus_register_dev(struct kvm_io_bus *bus, + struct kvm_io_device *dev) { BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); |