Commit df2a4a71 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman

Staging: hv: vmbus: Introduce read dependency in hv_get_ringbuffer_availbytes()

Introduce read dependency in hv_get_ringbuffer_availbytes().
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarAbhishek Kane <v-abkane@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent ef0d5b23
...@@ -50,6 +50,8 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi, ...@@ -50,6 +50,8 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
{ {
u32 read_loc, write_loc; u32 read_loc, write_loc;
smp_read_barrier_depends();
/* Capture the read/write indices before they changed */ /* Capture the read/write indices before they changed */
read_loc = rbi->ring_buffer->read_index; read_loc = rbi->ring_buffer->read_index;
write_loc = rbi->ring_buffer->write_index; write_loc = rbi->ring_buffer->write_index;
......
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