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include/linux/of.h: make for_each_child_of_node() reference its args when CONFIG_OF=n

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Make for_each_child_of_node() reference its args when CONFIG_OF=n to
avoid warnings like:

	drivers/leds/leds-pwm.c:88:22: warning: unused variable 'node' [-Wunused-variable]
	  struct device_node *node = pdev->dev.of_node;
			      ^

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2014-01-23 15:54:02 -08:00 committed by Linus Torvalds
parent 04f9b74e4d
commit 00b2c76a6a
1 changed files with 6 additions and 1 deletions
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7
include/linux/of.h
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@ -377,8 +377,13 @@ static inline bool of_have_populated_dt(void)
return false;
}
/* Kill an unused variable warning on a device_node pointer */
static inline void __of_use_dn(const struct device_node *np)
{
}
#define for_each_child_of_node(parent, child) \
while (0)
while (__of_use_dn(parent), __of_use_dn(child), 0)
#define for_each_available_child_of_node(parent, child) \
while (0)