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[PATCH v6 8/9] virtio: add some rcu comments
From: |
Eugenio Pérez |
Subject: |
[PATCH v6 8/9] virtio: add some rcu comments |
Date: |
Thu, 24 Oct 2019 19:14:05 +0200 |
Signed-off-by: Eugenio Pérez <address@hidden>
---
hw/virtio/virtio.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
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)
{
--
2.16.5
- [PATCH v6 0/9] Packed virtqueue for virtio, Eugenio Pérez, 2019/10/24
- [PATCH v6 1/9] virtio: basic structure for packed ring, Eugenio Pérez, 2019/10/24
- [PATCH v6 7/9] virtio: add property to enable packed virtqueue, Eugenio Pérez, 2019/10/24
- [PATCH v6 5/9] virtio: event suppression support for packed ring, Eugenio Pérez, 2019/10/24
- [PATCH v6 4/9] virtio: basic packed virtqueue support, Eugenio Pérez, 2019/10/24
- [PATCH v6 6/9] vhost_net: enable packed ring support, Eugenio Pérez, 2019/10/24
- [PATCH v6 3/9] virtio: Free rng and blk virqueues, Eugenio Pérez, 2019/10/24
- [PATCH v6 2/9] virtio: device/driver area size calculation refactor for split ring, Eugenio Pérez, 2019/10/24
- [PATCH v6 8/9] virtio: add some rcu comments,
Eugenio Pérez <=
- [PATCH v6 9/9] virtio: Move vdev->broken check to dispatch drop_all, Eugenio Pérez, 2019/10/24
- Re: [PATCH v6 0/9] Packed virtqueue for virtio, Jason Wang, 2019/10/24