Messages in this thread Patch in this message | | | From | "K. Y. Srinivasan" <> | Subject | [PATCH 6/9] Drivers: hv: ring_buffer: remove stray smp_read_barrier_depends() | Date | Mon, 14 Dec 2015 19:01:58 -0800 |
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From: Vitaly Kuznetsov <vkuznets@redhat.com>
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 <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> --- 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
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