From 94cc698fdaa7250c117343b34432ea6431b3856b Mon Sep 17 00:00:00 2001 From: David Rientjes Date: Tue, 6 Jun 2017 13:36:24 -0700 Subject: [PATCH] compiler, clang: suppress warning for unused static inline functions commit abb2ea7dfd82451d85ce669b811310c05ab5ca46 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 #ifdef directives, which also reduces LOC. Suppress the warning for clang. Signed-off-by: David Rientjes Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- include/linux/compiler-clang.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h index 01225b0059b1..5ce62d3e69b5 100644 --- a/include/linux/compiler-clang.h +++ b/include/linux/compiler-clang.h @@ -16,6 +16,13 @@ */ #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)) + /* Clang doesn't have a way to turn it off per-function, yet. */ #ifdef __noretpoline #undef __noretpoline