compiler, clang: suppress warning for unused static inline functions

GCC explicitly does not warn for unused static inline functions for -Wunused-function. The manual states: Warn whenever a static function is declared but not defined or a non-inline static function is unused. Clang does warn for static inline functions that are unused. It turns out that suppressing the warnings avoids potentially complex #ifdef directives, which also reduces LOC. Suppress the warning for clang. Signed-off-by: David Rientjes <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
frank-w · Jun 6, 2017 · abb2ea7 · abb2ea7
1 parent 84c6c30
commit abb2ea7
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
@@ -15,3 +15,10 @@
  * with any version that can compile the kernel
  */
 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
+
+/*
+ * GCC does not warn about unused static inline functions for
+ * -Wunused-function.  This turns out to avoid the need for complex #ifdef
+ * directives.  Suppress the warning in clang as well.
+ */
+#define inline inline __attribute__((unused))