From: K. Y. Srinivasan Date: Mon, 6 Jun 2011 22:49:51 +0000 (-0700) Subject: Staging: hv: vmbus: Fix the memory barrier in hv_ringbuffer_read() X-Git-Tag: firefly_0821_release~3680^2~4924^2~568^2~55 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ef0d5b23022e207e9f367de52f4172daab3ac690;p=firefly-linux-kernel-4.4.55.git Staging: hv: vmbus: Fix the memory barrier in hv_ringbuffer_read() Use the correct barrier interface. Signed-off-by: K. Y. Srinivasan Signed-off-by: Haiyang Zhang Signed-off-by: Abhishek Kane Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c index 3da333018b5a..932af1a01a1e 100644 --- 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);