Commit c204537d authored Feb 22, 2017 by Arnaldo Carvalho de Melo Committed by Greg Kroah-Hartman Jun 05, 2018

tools include: Adopt __compiletime_error

commit 4900653829175f60356efc279695bb23c59483c3 upstream.

From the kernel, get the gcc one and provide the fallback so that we can
continue build with other compilers, such as with clang.

Will be used by tools/arch/x86/include/asm/cmpxchg.h.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-pecgz6efai4a9euuk4rxuotr@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 09aaaa60

tools/include/linux/compiler-gcc.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -12,3 +12,7 @@
		#if GCC_VERSION >= 70000 && !defined(__CHECKER__)
		# define __fallthrough __attribute__ ((fallthrough))
		#endif

		#if GCC_VERSION >= 40300
		# define __compiletime_error(message) __attribute__((error(message)))
		#endif /* GCC_VERSION >= 40300 */

tools/include/linux/compiler.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -5,6 +5,10 @@
		#include <linux/compiler-gcc.h>
		#endif

		#ifndef __compiletime_error
		# define __compiletime_error(message)
		#endif

		/* Optimization barrier */
		/* The "volatile" is due to gcc bugs */
		#define barrier() __asm__ __volatile__("": : :"memory")