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-rw-r--r--include/linux/hyperv.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 64698ec8f2ac..8b9a93c99c9b 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -141,6 +141,11 @@ struct hv_ring_buffer_info {
u32 ring_datasize; /* < ring_size */
u32 priv_read_index;
+ /*
+ * The ring buffer mutex lock. This lock prevents the ring buffer from
+ * being freed while the ring buffer is being accessed.
+ */
+ struct mutex ring_buffer_mutex;
};
@@ -1206,7 +1211,7 @@ struct hv_ring_buffer_debug_info {
};
-int hv_ringbuffer_get_debuginfo(const struct hv_ring_buffer_info *ring_info,
+int hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
struct hv_ring_buffer_debug_info *debug_info);
/* Vmbus interface */