Staging: hv: vmbus: Fix the memory barrier in hv_ringbuffer_read()

Use the correct barrier interface.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c
index 3da333018b5a62869882ba236e38dc49b9bd5677..932af1a01a1ef3b561540738c29a754dfa6faa56 100644 (file)
--- a/drivers/staging/hv/ring_buffer.c
+++ b/drivers/staging/hv/ring_buffer.c
@@ -513,7 +513,7 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
        /* Make sure all reads are done before we update the read index since */
        /* the writer may start writing to the read area once the read index */
        /*is updated */
-       mb();
+       smp_mb();
 
        /* Update the read index */
        hv_set_next_read_location(inring_info, next_read_location);