UBI: improve checking in debugging prints

#else

#define ubi_assert(expr)                 ({})

#define dbg_err(fmt, ...)                ({})

#define dbg_msg(fmt, ...)                ({})

#define dbg_gen(fmt, ...)                ({})

#define dbg_eba(fmt, ...)                ({})

#define dbg_wl(fmt, ...)                 ({})

#define dbg_io(fmt, ...)                 ({})

#define dbg_bld(fmt, ...)                ({})

/* Use "if (0)" to make compiler check arguments even if debugging is off */

#define ubi_assert(expr)  do {                                               \

	if (0) {                                                             \

		printk(KERN_CRIT "UBI assert failed in %s at %u (pid %d)\n", \

		       __func__, __LINE__, current->pid);                    \

	}                                                                    \

} while (0)

#define dbg_err(fmt, ...) do {                                               \

	if (0)                                                               \

		ubi_err(fmt, ##__VA_ARGS__);                                 \

} while (0)

#define dbg_msg(fmt, ...) do {                                               \

	if (0)                                                               \

		printk(KERN_DEBUG "UBI DBG (pid %d): %s: " fmt "\n",         \

		       current->pid, __func__, ##__VA_ARGS__);               \

} while (0)

#define dbg_gen(fmt, ...)  dbg_msg(fmt, ##__VA_ARGS__)

#define dbg_eba(fmt, ...)  dbg_msg(fmt, ##__VA_ARGS__)

#define dbg_wl(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)

#define dbg_io(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)

#define dbg_bld(fmt, ...)  dbg_msg(fmt, ##__VA_ARGS__)

#define ubi_dbg_dump_stack()             ({})

#define ubi_dbg_dump_ec_hdr(ec_hdr)      ({})

#define ubi_dbg_dump_vid_hdr(vid_hdr)    ({})