compiler, clang: suppress warning for unused static inline functions

abb2ea7d · David Rientjes <[email protected]> · 2017-06-06 13:36:24 -07:00

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]>

Commit: abb2ea7dfd82451d85ce669b811310c05ab5ca46
Parents: 84c6c303

Changes

1 files changed · +7 −0

File	Status	Add	Del	Content
include/linux/compiler-clang.h	modified	+7	−0	View file

include/linux/compiler-clang.h

View file

diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
index de17999..ea91260 100644
--- 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))