diff options
Diffstat (limited to 'drivers/staging/hv/ring_buffer.c')
| -rw-r--r-- | drivers/staging/hv/ring_buffer.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c index 3da333018b5a..42f76728429a 100644 --- a/drivers/staging/hv/ring_buffer.c +++ b/drivers/staging/hv/ring_buffer.c @@ -50,6 +50,8 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi, { u32 read_loc, write_loc; + smp_read_barrier_depends(); + /* Capture the read/write indices before they changed */ read_loc = rbi->ring_buffer->read_index; write_loc = rbi->ring_buffer->write_index; @@ -411,7 +413,7 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info, sizeof(u64)); /* Make sure we flush all writes before updating the writeIndex */ - mb(); + smp_wmb(); /* Now, update the write location */ hv_set_next_write_location(outring_info, next_write_location); @@ -513,7 +515,7 @@ 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); |