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Drivers: hv: vmbus: Use the new virt_xx barrier code

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Use the virt_xx barriers that have been defined for use in virtual machines.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2016-04-02 17:59:48 -07:00 committed by Greg Kroah-Hartman
parent d45faaeedb
commit dcd0eeca44
1 changed files with 7 additions and 7 deletions
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14
drivers/hv/ring_buffer.c
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@ -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.
@ -115,7 +115,7 @@ static bool hv_need_to_signal_on_read(struct hv_ring_buffer_info *rbi)
* read index, we could miss sending the interrupt. Issue a full
* memory barrier to address this.
*/
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. */
@ -371,7 +371,7 @@ 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);
@ -447,7 +447,7 @@ 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);