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    Subject[PATCH 28/49] Staging: hv: vmbus: Introduce read dependency in hv_get_ringbuffer_availbytes()
    Date
    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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