| From abb2ea7dfd82451d85ce669b811310c05ab5ca46 Mon Sep 17 00:00:00 2001 |
| From: David Rientjes <rientjes@google.com> |
| Date: Tue, 6 Jun 2017 13:36:24 -0700 |
| Subject: compiler, clang: suppress warning for unused static inline functions |
| |
| From: David Rientjes <rientjes@google.com> |
| |
| 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 <rientjes@google.com> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| include/linux/compiler-clang.h | 7 +++++++ |
| 1 file changed, 7 insertions(+) |
| |
| --- 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)) |
