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| author |   K. Y. Srinivasan <kys@microsoft.com> | 2016-04-02 17:59:48 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 14:00:19 -0700 |
| commit | dcd0eeca4454d5c5a60aa3467581e0c6d7461b96 (patch) | |
| tree | 32523d22735d87211f82d204b0bffc57237b077b /drivers/hv | |
| parent | Drivers: hv: vmbus: Use READ_ONCE() to read variables that are volatile (diff) | |
| download | linux-dev-dcd0eeca4454d5c5a60aa3467581e0c6d7461b96.tar.xz linux-dev-dcd0eeca4454d5c5a60aa3467581e0c6d7461b96.zip | |
Drivers: hv: vmbus: Use the new virt_xx barrier code
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>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | 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 6ea1b552cc8a..8f518af3074d 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. @@ -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); |