[PATCH v5 27/45] vhost: make features 64 bit

Michael S. Tsirkin
Thu, 27 Nov 2014 12:32:20 -0000

We need to use bit 32 for virtio 1.0

Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
---
 drivers/vhost/vhost.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 3eda654..c624b09 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -106,7 +106,7 @@ struct vhost_virtqueue {
 	/* Protected by virtqueue mutex. */
 	struct vhost_memory *memory;
 	void *private_data;
-	unsigned acked_features;
+	u64 acked_features;
 	/* Log write descriptors */
 	void __user *log_base;
 	struct vhost_log *log;
@@ -174,6 +174,6 @@ enum {

 static inline int vhost_has_feature(struct vhost_virtqueue *vq, int bit)
 {
-	return vq->acked_features & (1 << bit);
+	return vq->acked_features & (1ULL << bit);
 }
 #endif
--
MST