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    Subject[PATCH 27/49] Staging: hv: vmbus: Fix the memory barrier in hv_ringbuffer_read()
    Date
    Use the correct barrier interface.

    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, 1 insertions(+), 1 deletions(-)

    diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c
    index 3da3330..932af1a 100644
    --- a/drivers/staging/hv/ring_buffer.c
    +++ b/drivers/staging/hv/ring_buffer.c
    @@ -513,7 +513,7 @@ int hv_ringbuffer_read(struct hv_ring_buffer_info *inring_info, void *buffer,
    /* Make sure all reads are done before we update the read index since */
    /* the writer may start writing to the read area once the read index */
    /*is updated */
    - mb();
    + smp_mb();

    /* Update the read index */
    hv_set_next_read_location(inring_info, next_read_location);
    --
    1.7.4.1


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