[v6,8/9] virtio: add some rcu comments

Commit Message

Eugenio Perez Martin Oct. 24, 2019, 5:14 p.m. UTC

Signed-off-by: Eugenio Pérez <[e-mail]>
---
 hw/virtio/virtio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 3cf12a62c0..9195b08da8 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -278,6 +278,7 @@  static void vring_packed_flags_write(VirtIODevice *vdev,
     address_space_cache_invalidate(cache, off, sizeof(flags));
 }
 
+/* Called within rcu_read_lock().  */
 static VRingMemoryRegionCaches *vring_get_region_caches(struct VirtQueue *vq)
 {
     VRingMemoryRegionCaches *caches = atomic_rcu_read(&vq->vring.caches);
@@ -721,7 +722,6 @@  bool virtqueue_rewind(VirtQueue *vq, unsigned int num)
     return true;
 }
 
-/* Called within rcu_read_lock().  */
 static void virtqueue_split_fill(VirtQueue *vq, const VirtQueueElement *elem,
                     unsigned int len, unsigned int idx)
 {
@@ -780,6 +780,7 @@  static void virtqueue_packed_fill_desc(VirtQueue *vq,
     vring_packed_desc_write(vq->vdev, &desc, &caches->desc, head, strict_order);
 }
 
+/* Called within rcu_read_lock().  */
 void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
                     unsigned int len, unsigned int idx)
 {