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compiler, clang: suppress warning for unused static inline functions

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commit abb2ea7dfd upstream.

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

Suppress the warning for clang.

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Rientjes
2017-06-06 13:36:24 -07:00
committed by Chris
parent 2a636ea2ee
commit 4c47b8462e
1 changed files with 7 additions and 0 deletions
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7
include/linux/compiler-clang.h
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@@ -33,6 +33,13 @@
#define __SANITIZE_ADDRESS__
#endif
/*
* 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))
/* Clang doesn't have a way to turn it off per-function, yet. */
#ifdef __noretpoline
#undef __noretpoline