DBG
#define DBG(x) x
#define DBG(x)
#define DBG(...) do { \
#define DBG(flag, msg) do { \
#define DBG(...)
#define DBG 0
#define DBG 0
#define DBG 0
#define DBG 0
#define DBG 0
#define DBG 0
#define DBG(fmt, args...) \
#define DBG(fmt, args...) do { } while (0)
#define DBG 0
#define DBG 0
#define DBG 0
#define DBG(x) x
#define DBG(x)
#define DBG 1
#define DBG do { printf("ng_device: %s\n", __func__); } while (0)
#define DBG do {} while (0)
#define DBG(...) __VA_ARGS__
#define DBG(...)
#define DBG 0x86 /* call debugger */