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Drivers: hv: ring_buffer: remove stray smp_read_barrier_depends()
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 0 additions and 2 deletions
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@ -141,8 +141,6 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
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{
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{
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u32 read_loc, write_loc, dsize;
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u32 read_loc, write_loc, dsize;
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smp_read_barrier_depends();
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/* Capture the read/write indices before they changed */
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/* Capture the read/write indices before they changed */
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read_loc = rbi->ring_buffer->read_index;
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read_loc = rbi->ring_buffer->read_index;
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write_loc = rbi->ring_buffer->write_index;
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write_loc = rbi->ring_buffer->write_index;
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