| From | "K. Y. Srinivasan" <> | Subject | [PATCH 28/49] Staging: hv: vmbus: Introduce read dependency in hv_get_ringbuffer_availbytes() | Date | Mon, 6 Jun 2011 15:49:52 -0700 |
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Introduce read dependency in hv_get_ringbuffer_availbytes().
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Abhishek Kane <v-abkane@microsoft.com> --- drivers/staging/hv/ring_buffer.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c index 932af1a..8b62553 100644 --- a/drivers/staging/hv/ring_buffer.c +++ b/drivers/staging/hv/ring_buffer.c @@ -50,6 +50,8 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi, { u32 read_loc, write_loc; + 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; -- 1.7.4.1
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