From: Mark Charlebois <charl...@gmail.com>
This code makes a compile time type check that is optimized away. Clang
complains that it generates an unused function.
I believe GCC won't complain for a static inline fuction but would if it
was just a static function.
Adding the unused attribute to the function declaration removes the warning.
This code works for both gcc and clang.
Signed-off-by: Mark Charlebois <charl...@gmail.com>
Signed-off-by: Behan Webster <beh...@converseincode.com>
---
include/linux/moduleparam.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index c3eb102..5ce1f67 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -346,6 +346,7 @@ static inline void destroy_params(const struct kernel_param
*params,
/* The macros to do compile-time type checking stolen from Jakub
Jelinek, who IIRC came up with this idea for the 2.4 module init code. */
#define __param_check(name, p, type) \
+ static inline type *__check_##name(void) __attribute__ ((unused)); \
static inline type *__check_##name(void) { return(p); }
extern struct kernel_param_ops param_ops_byte;
--
1.8.3.2
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