If variable is of Type,		use printk format specifier:
---------------------------------------------------------
		int			%d or %x
		unsigned int		%u or %x
		long			%ld or %lx
		unsigned long		%lu or %lx
		long long		%lld or %llx
		unsigned long long	%llu or %llx
		size_t			%zu or %zx
		ssize_t			%zd or %zx

Raw pointer value SHOULD be printed with %p. The kernel supports
the following extended format specifiers for pointer types:

Struct Resources:

	%pr	[mem 0x60000000-0x6fffffff flags 0x2200] or
		[mem 0x0000000060000000-0x000000006fffffff flags 0x2200]
	%pR	[mem 0x60000000-0x6fffffff pref] or
		[mem 0x0000000060000000-0x000000006fffffff pref]

	For printing struct resources. The 'R' and 'r' specifiers result in a
	printed resource with ('R') or without ('r') a decoded flags member.

MAC/FDDI addresses:

	%pM	00:01:02:03:04:05

	For printing 6-byte MAC/FDDI addresses in hex notation.

u64 SHOULD be printed with %llu/%llx, (unsigned long long):

	printk("%llu", (unsigned long long)u64_var);

s64 SHOULD be printed with %lld/%llx, (long long):

	printk("%lld", (long long)s64_var);

If <type> is dependent on a config option for its size (e.g., sector_t,
blkcnt_t, phys_addr_t, resource_size_t) or is architecture-dependent
for its size (e.g., tcflag_t), use a format specifier of its largest
possible type and explicitly cast to it.  Example:

	printk("test: sector number/total blocks: %llu/%llu\n",
		(unsigned long long)sector, (unsigned long long)blockcount);

Reminder: sizeof() result is of type size_t.

Thank you for your cooperation and attention.


By Randy Dunlap <rdunlap@xenotime.net> and
Andrew Murray <amurray@mpc-data.co.uk>