Merge tag 'compiler-attributes-for-linus-v5.15-rc1-v2' of git://github.com/ojeda/linux

Pull compiler attributes updates from Miguel Ojeda: - Fix __has_attribute(__no_sanitize_coverage__) for GCC 4 (Marco Elver) - Add Nick as Reviewer for compiler_attributes.h (Nick Desaulniers) - Move __compiletime_{error|warning} (Nick Desaulniers) * tag 'compiler-attributes-for-linus-v5.15-rc1-v2' of git://github.com/ojeda/linux: compiler_attributes.h: move __compiletime_{error|warning} MAINTAINERS: add Nick as Reviewer for compiler_attributes.h Compiler Attributes: fix __has_attribute(__no_sanitize_coverage__) for GCC 4

Linus Torvalds committed 5 years ago

Commit c3e46872 parents d41adc4 b83a9084 files · +26 −9Browse files

Unified · Split

4 files

MAINTAINERS +1 −0
include/linux/compiler-gcc.h +0 −3
include/linux/compiler_attributes.h +25 −0
include/linux/compiler_types.h +0 −6

MAINTAINERS+1−0

@@ -4684,6 +4684,7 @@ F: drivers/platform/x86/compal-laptop.c · 4683 unmodified lines
4684	4684
4685	4685	COMPILER ATTRIBUTES
4686	4686	M: Miguel Ojeda <ojeda@kernel.org>
	4687	+R: Nick Desaulniers <ndesaulniers@google.com>
4687	4688	S: Maintained
4688	4689	F: include/linux/compiler_attributes.h
4689	4690

include/linux/compiler-gcc.h+0−3

@@ -43,9 +43,6 @@ · 42 unmodified lines
43	43
44	44	#define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
45	45
46		−#define __compiletime_warning(message) __attribute__((__warning__(message)))
47		−#define __compiletime_error(message) __attribute__((__error__(message)))
48		−
49	46	#if defined(LATENT_ENTROPY_PLUGIN) && !defined(__CHECKER__)
50	47	#define __latent_entropy __attribute__((latent_entropy))
51	48	#endif

include/linux/compiler_attributes.h+25−0

@@ -30,6 +30,7 @@ · 29 unmodified lines
30	30	# define __GCC4_has_attribute___assume_aligned__ 1
31	31	# define __GCC4_has_attribute___copy__ 0
32	32	# define __GCC4_has_attribute___designated_init__ 0
	33	+# define __GCC4_has_attribute___error__ 1
33	34	# define __GCC4_has_attribute___externally_visible__ 1
34	35	# define __GCC4_has_attribute___no_caller_saved_registers__ 0
35	36	# define __GCC4_has_attribute___noclone__ 1
@@ -37,7 +38,9 @@ · 1 unmodified line
37	38	# define __GCC4_has_attribute___nonstring__ 0
38	39	# define __GCC4_has_attribute___no_sanitize_address__ 1
39	40	# define __GCC4_has_attribute___no_sanitize_undefined__ 1
	41	+# define __GCC4_has_attribute___no_sanitize_coverage__ 0
40	42	# define __GCC4_has_attribute___fallthrough__ 0
	43	+# define __GCC4_has_attribute___warning__ 1
41	44	#endif
42	45
43	46	/*
@@ -137,6 +140,17 @@ · 93 unmodified lines
137	140	# define __designated_init
138	141	#endif
139	142
	143	+/*
	144	+ * Optional: only supported since clang >= 14.0
	145	+ *
	146	+ * gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-error-function-attribute
	147	+ */
	148	+#if __has_attribute(__error__)
	149	+# define __compiletime_error(msg) __attribute__((__error__(msg)))
	150	+#else
	151	+# define __compiletime_error(msg)
	152	+#endif
	153	+
140	154	/*
141	155	* Optional: not supported by clang
142	156	*
@@ -298,6 +312,17 @@ · 155 unmodified lines
298	312	*/
299	313	#define __must_check __attribute__((__warn_unused_result__))
300	314
	315	+/*
	316	+ * Optional: only supported since clang >= 14.0
	317	+ *
	318	+ * gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-warning-function-attribute
	319	+ */
	320	+#if __has_attribute(__warning__)
	321	+# define __compiletime_warning(msg) __attribute__((__warning__(msg)))
	322	+#else
	323	+# define __compiletime_warning(msg)
	324	+#endif
	325	+
301	326	/*
302	327	* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-weak-function-attribute
303	328	* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-weak-variable-attribute

include/linux/compiler_types.h+0−6

@@ -294,12 +294,6 @@ struct ftrace_likely_data { · 293 unmodified lines
294	294	#ifndef __compiletime_object_size
295	295	# define __compiletime_object_size(obj) -1
296	296	#endif
297		−#ifndef __compiletime_warning
298		−# define __compiletime_warning(message)
299		−#endif
300		−#ifndef __compiletime_error
301		−# define __compiletime_error(message)
302		−#endif
303	297
304	298	#ifdef __OPTIMIZE__
305	299	# define __compiletime_assert(condition, msg, prefix, suffix) \