linux-kernel - [PATCH] virtio: drop internal struct from UAPI

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Message-ID: <20190201221553.7210-1-mst@redhat.com>
Date:   Fri, 1 Feb 2019 17:16:01 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Tiwei Bie <tiwei.bie@...el.com>, Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH] virtio: drop internal struct from UAPI

There's no reason to expose struct vring_packed in UAPI - if we do we
won't be able to change or drop it, and it's not part of any interface.

Let's move it to virtio_ring.c

Cc: Tiwei Bie <tiwei.bie@...el.com>
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/virtio/virtio_ring.c     |  7 ++++++-
 include/uapi/linux/virtio_ring.h | 10 ----------
 2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 412e0c431d87..1c85b3423182 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -152,7 +152,12 @@ struct vring_virtqueue {
 		/* Available for packed ring */
 		struct {
 			/* Actual memory layout for this queue. */
-			struct vring_packed vring;
+			struct {
+				unsigned int num;
+				struct vring_packed_desc *desc;
+				struct vring_packed_desc_event *driver;
+				struct vring_packed_desc_event *device;
+			} vring;
 
 			/* Driver ring wrap counter. */
 			bool avail_wrap_counter;
diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h
index 2414f8af26b3..4c4e24c291a5 100644
--- a/include/uapi/linux/virtio_ring.h
+++ b/include/uapi/linux/virtio_ring.h
@@ -213,14 +213,4 @@ struct vring_packed_desc {
 	__le16 flags;
 };
 
-struct vring_packed {
-	unsigned int num;
-
-	struct vring_packed_desc *desc;
-
-	struct vring_packed_desc_event *driver;
-
-	struct vring_packed_desc_event *device;
-};
-
 #endif /* _UAPI_LINUX_VIRTIO_RING_H */
-- 
MST