Merge tag 'compiler-attributes-for-linus-v5.16' of git://github.com/ojeda/linux

Pull compiler attributes update from Miguel Ojeda:
 "An improvement for `__compiletime_assert` and a trivial cleanup"

* tag 'compiler-attributes-for-linus-v5.16' of git://github.com/ojeda/linux:
  compiler_types: mark __compiletime_assert failure as __noreturn
  Compiler Attributes: remove GCC 5.1 mention

include/linux/compiler_attributes.h

@@ -113,7 +113,6 @@
 #define __deprecated
 
 /*
- * Optional: only supported since gcc >= 5.1
  * Optional: not supported by clang
  * Optional: not supported by icc
  *

include/linux/compiler_types.h

@@ -305,7 +305,13 @@ struct ftrace_likely_data {
 #ifdef __OPTIMIZE__
 # define __compiletime_assert(condition, msg, prefix, suffix)		\
 	do {								\
-		extern void prefix ## suffix(void) __compiletime_error(msg); \
+		/*							\
+		 * __noreturn is needed to give the compiler enough	\
+		 * information to avoid certain possibly-uninitialized	\
+		 * warnings (regardless of the build failing).		\
+		 */							\
+		__noreturn extern void prefix ## suffix(void)		\
+			__compiletime_error(msg);			\
 		if (!(condition))					\
 			prefix ## suffix();				\
 	} while (0)