Use the virt_xx barriers that have been defined for use in virtual machines.
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
---
drivers/hv/ring_buffer.c | 14 +++++++-------
1 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index 67dc245..c2c2b2e 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -33,14 +33,14 @@
void hv_begin_read(struct hv_ring_buffer_info *rbi)
{
rbi->ring_buffer->interrupt_mask = 1;
- mb();
+ virt_mb();
}
u32 hv_end_read(struct hv_ring_buffer_info *rbi)
{
rbi->ring_buffer->interrupt_mask = 0;
- mb();
+ virt_mb();
/*
* Now check to see if the ring buffer is still empty.
@@ -68,12 +68,12 @@ u32 hv_end_read(struct hv_ring_buffer_info *rbi)
static bool hv_need_to_signal(u32 old_write, struct hv_ring_buffer_info *rbi)
{
- mb();
+ virt_mb();
if (READ_ONCE(rbi->ring_buffer->interrupt_mask))
return false;
/* check interrupt_mask before read_index */
- rmb();
+ virt_rmb();
/*
* This is the only case we need to signal when the
* ring transitions from being empty to non-empty.
@@ -104,7 +104,7 @@ static bool hv_need_to_signal_on_read(struct
hv_ring_buffer_info *rbi)
u32 cur_write_sz;
u32 pending_sz;
- mb();
+ virt_mb();
pending_sz = READ_ONCE(rbi->ring_buffer->pending_send_sz);
/* If the other end is not blocked on write don't bother. */
if (pending_sz == 0)
@@ -359,7 +359,7 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info
*outring_info,
sizeof(u64));
/* Issue a full memory barrier before updating the write index */
- mb();
+ virt_mb();
/* Now, update the write location */
hv_set_next_write_location(outring_info, next_write_location);
@@ -435,7 +435,7 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info
*inring_info,
* the writer may start writing to the read area once the read index
* is updated.
*/
- mb();
+ virt_mb();
/* Update the read index */
hv_set_next_read_location(inring_info, next_read_location);
--
1.7.4.1
_______________________________________________
devel mailing list
de...@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
