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Subject[PATCH 4.4 01/31] compiler, clang: suppress warning for unused static inline functions
4.4-stable review patch.  If anyone has any objections, please let me know.


From: David Rientjes <>

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(+)

--- 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))

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