[REPOST PATCH 2/8] seqno-fence: Hardware dma-buf implementation of fencing (v5)

This type of fence can be used with hardware synchronization for simple hardware that can block execution until the condition (dma_buf[offset] - value) >= 0 has been met when WAIT_GEQUAL is used, or (dma_buf[offset] != 0) has been met when WAIT_NONZERO is set. A software fallback still has to be

[REPOST PATCH 2/8] seqno-fence: Hardware dma-buf implementation of fencing (v5)

This type of fence can be used with hardware synchronization for simple hardware that can block execution until the condition (dma_buf[offset] - value) = 0 has been met when WAIT_GEQUAL is used, or (dma_buf[offset] != 0) has been met when WAIT_NONZERO is set. A software fallback still has to be