smp_read_barrier_depends() does nothing on almost all arcitectures
including x86 and having it in the beginning of
hv_get_ringbuffer_availbytes() does not provide any guarantees anyway.
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
include/linux/hyperv.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 8fdc17b..1777dc8 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -141,8 +141,6 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
{
u32 read_loc, write_loc, dsize;
- 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;
--
2.4.3
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