compat: backport net_ratelimited_function()

compat: backport net_ratelimited_function()

This backports this patch:

	From 3a3bfb61e64476ff1e4ac3122cb6dec9c79b795c Mon Sep 17 00:00:00 2001
	From: Joe Perches <joe@perches.com>
	Date: Sun, 13 May 2012 21:56:25 +0000
	Subject: [PATCH] net: Add net_ratelimited_function and
	 net_<level>_ratelimited macros

	__ratelimit() can be considered an inverted bool test because
	it returns true when not ratelimited.  Several tests in the
	kernel tree use this __ratelimit() function incorrectly.

	No net_ratelimit uses are incorrect currently though.

	Most uses of net_ratelimit are to log something via printk or
	pr_<level>.

	In order to minimize the uses of net_ratelimit, and to start
	standardizing the code style used for __ratelimit() and net_ratelimit(),
	add a net_ratelimited_function() macro and net_<level>_ratelimited()
	logging macros similar to pr_<level>_ratelimited that use the global
	net_ratelimit instead of a static per call site "struct ratelimit_state".

	Signed-off-by: Joe Perches <joe@perches.com>
	Signed-off-by: David S. Miller <davem@davemloft.net>
mcgrof@tux ~/compat (git::master)$ ckmake
Trying kernel                  3.4.0-030400rc1-generic	[OK]
Trying kernel                  3.3.0-030300rc2-generic	[OK]
Trying kernel                     3.2.2-030202-generic	[OK]
Trying kernel                    3.1.10-030110-generic	[OK]
Trying kernel                    3.0.18-030018-generic	[OK]
Trying kernel                  2.6.39-02063904-generic	[OK]
Trying kernel                  2.6.38-02063808-generic	[OK]
Trying kernel                  2.6.37-02063706-generic	[OK]
Trying kernel                  2.6.36-02063604-generic	[OK]
Trying kernel                  2.6.35-02063512-generic	[OK]
Trying kernel                  2.6.34-02063410-generic	[OK]
Trying kernel                  2.6.33-02063305-generic	[OK]
Trying kernel                  2.6.32-02063255-generic	[OK]
Trying kernel                  2.6.31-02063113-generic	[OK]
Trying kernel                  2.6.30-02063010-generic	[OK]
Trying kernel                  2.6.29-02062906-generic	[OK]
Trying kernel                  2.6.28-02062810-generic	[OK]
Trying kernel                    2.6.27-020627-generic	[OK]
Trying kernel                    2.6.26-020626-generic	[OK]
Trying kernel                    2.6.25-020625-generic	[OK]
Trying kernel                    2.6.24-020624-generic	[OK]

Signed-off-by: Luis R. Rodriguez <mcgrof@frijolero.org>