[RFC] OF: make of_property_for_each_u32() use parameters if OF is not enabled

[Sebastian Andrzej Siewior]

I am getting a few
|warning: unused variable ‘p’ [-Wunused-variable]
|warning: unused variable ‘prop’ [-Wunused-variable]

in the case where CONFIG_OF is not defined and the parameters are only
used in the loop macro.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
---
 include/linux/of.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/of.h b/include/linux/of.h
index 1fd08ca..5a89f3f 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -507,8 +507,8 @@ static inline int of_machine_is_compatible(const char *compat)
 
 #define of_match_ptr(_ptr)	NULL
 #define of_match_node(_matches, _node)	NULL
-#define of_property_for_each_u32(np, propname, prop, p, u) \
-	while (0)
+#define of_property_for_each_u32(np, propname, prop, p, u)	\
+	for (prop = NULL, p = NULL; 0; prop++, p++)
 #define of_property_for_each_string(np, propname, prop, s) \
 	while (0)
 #endif /* CONFIG_OF */
-- 
1.7.10.4