From: Vitaly Kuznetsov <[email protected]> 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 <[email protected]> Signed-off-by: K. Y. Srinivasan <[email protected]> --- include/linux/hyperv.h | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index acd995b..179ff33 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; -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
