From: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: Thu, 26 Aug 2021 17:26:56 +0000 (+0200)
Subject: hw/virtio: Document virtio_queue_packed_empty_rcu is called within RCU
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7f51beddadbc7d879a4f0979c1cf330f7010161a;p=qemu.git

hw/virtio: Document virtio_queue_packed_empty_rcu is called within RCU

While virtio_queue_packed_empty_rcu() uses the '_rcu' suffix,
it is not obvious it is called within rcu_read_lock(). All other
functions from this file called with the RCU locked have a comment
describing it. Document this one similarly for consistency.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210826172658.2116840-2-philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
---

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 874377f37a..a5214bca61 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -634,6 +634,7 @@ static int virtio_queue_split_empty(VirtQueue *vq)
     return empty;
 }
 
+/* Called within rcu_read_lock().  */
 static int virtio_queue_packed_empty_rcu(VirtQueue *vq)
 {
     struct VRingPackedDesc desc;