[PATCH 1/2] virtio_ring: fix error - unknown type name 'spinlock_t'

[Cai Huoqing]

when run "make virtio" in linux/tools,
the error: unknown type name 'spinlock_t' occurs

Signed-off-by: Cai Huoqing <caihuoqing@xxxxxxxxx>
---
 include/linux/vringh.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index 84db7b8f912f..ff21c2643792 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h
@@ -43,11 +43,13 @@ struct vringh {
        /* The vring (note: it may contain user pointers!) */
        struct vring vring;

+#if IS_REACHABLE(CONFIG_VHOST_IOTLB)
        /* IOTLB for this vring */
        struct vhost_iotlb *iotlb;

        /* spinlock to synchronize IOTLB accesses */
        spinlock_t *iotlb_lock;
+#endif

        /* The function to call to notify the guest about added buffers */
        void (*notify)(struct vringh *);
--
2.25.1