#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x41)
#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x42)
#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x41)
#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x42)