Commit abb2ea7d authored Jun 06, 2017 by David Rientjes Committed by Linus Torvalds Jun 06, 2017

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 <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 84c6c303

include/linux/compiler-clang.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -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))