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Date: Thu, 23 Oct 2008 15:41:33 +0400
From: Alexey Dobriyan <adobriyan@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: How do I printk <type> correctly?
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If variable is of Type	use	printk format specifier.
---------------------------------------------------------
		int			%d or %x
		unsigned int		%u or %x
		long			%ld ot %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.

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 config option (sector_t), use format specifier
of biggest type and explicitly cast to it.

Reminder: sizeof() result is of type size_t.

Thank you for your cooperation.