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UPSTREAM: compiler, clang: suppress warning for unused static inline functions

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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>
(cherry picked from commit abb2ea7dfd82451d85ce669b811310c05ab5ca46)
Signed-off-by: Greg Hackmann <ghackmann@google.com>

Change-Id: I68e6246b03c962cc87b9d0bf4b7fefeda27068c0
This commit is contained in:
David Rientjes 2017-06-06 13:36:24 -07:00 • committed by Greg Hackmann
parent f01b0c528e
commit 79ec10f992
1 changed files with 7 additions and 0 deletions
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7
include/linux/compiler-clang.h
View file

@ -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))