#define RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS _IO(0xF6, 0x0E)
/* Flush the current sub-buffer, even if empty. */
#define RING_BUFFER_FLUSH_EMPTY _IO(0xF6, 0x0F)
#define RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS _IO(0xF6, 0x0E)
/* Flush the current sub-buffer, even if empty. */
#define RING_BUFFER_FLUSH_EMPTY _IO(0xF6, 0x0F)