iio_buffer_signal_dmabuf_done
iio_buffer_signal_dmabuf_done(block->fence, 0);
iio_buffer_signal_dmabuf_done(block->fence,
iio_buffer_signal_dmabuf_done(block->fence, ret);
iio_buffer_signal_dmabuf_done(&fence->base, ret);
EXPORT_SYMBOL_GPL(iio_buffer_signal_dmabuf_done);
void iio_buffer_signal_dmabuf_done(struct dma_fence *fence, int ret);