On 04/14/2015 11:25 AM, Martin Liška wrote:
Because GCC trunk version has switched to GCC 6.x, new header file is needed. Signed-off-by: Martin Liska <mliska@xxxxxxx> --- include/linux/compiler-gcc6.h | 55 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 include/linux/compiler-gcc6.h diff --git a/include/linux/compiler-gcc6.h b/include/linux/compiler-gcc6.h new file mode 100644 index 0000000..208767a --- /dev/null +++ b/include/linux/compiler-gcc6.h @@ -0,0 +1,55 @@ +#ifndef __LINUX_COMPILER_H +#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead." +#endif + +#define __used __attribute__((__used__)) +#define __must_check __attribute__((warn_unused_result)) +#define __compiler_offsetof(a, b) __builtin_offsetof(a, b) + +/* Mark functions as cold. gcc will assume any path leading to a call + to them will be unlikely. This means a lot of manual unlikely()s + are unnecessary now for any paths leading to the usual suspects + like BUG(), printk(), panic() etc. [but let's keep them for now for + older compilers] + + gcc also has a __attribute__((__hot__)) to move hot functions into + a special section, but I don't see any sense in this right now in + the kernel context */ +#define __cold __attribute__((__cold__)) + +#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) + +#ifndef __CHECKER__ +# define __compiletime_warning(message) __attribute__((warning(message))) +# define __compiletime_error(message) __attribute__((error(message))) +#endif /* __CHECKER__ */ + +/* + * Mark a position in code as unreachable. This can be used to + * suppress control flow warnings after asm blocks that transfer + * control elsewhere. + */ +#define unreachable() __builtin_unreachable() + +/* Mark a function definition as prohibited from being cloned. */ +#define __noclone __attribute__((__noclone__)) + +/* + * Tell the optimizer that something else uses this function or variable. + */ +#define __visible __attribute__((externally_visible)) + +/* + * 'asm goto' miscompilation is fixed in GCC 5.x version: + * + * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 + */ +#define asm_volatile_goto(x...) do { asm goto(x); } while (0) + +#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP +#define __HAVE_BUILTIN_BSWAP32__ +#define __HAVE_BUILTIN_BSWAP64__ +#define __HAVE_BUILTIN_BSWAP16__ +#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ + +#define KASAN_ABI_VERSION 4
Hello. v2 of the patch where I made a copy of compiler-gcc6.h from compiler-gcc5.h. Thanks, Martin
>From 2163ba712ed9e2305d8f3fad704b201d70edd3d8 Mon Sep 17 00:00:00 2001 From: mliska <mliska@xxxxxxx> Date: Wed, 15 Apr 2015 10:56:43 +0200 Subject: [PATCH 2/2] compiler/gcc6: add support for GCC 6 Because GCC trunk version has switched to GCC 6.x, new header file is needed. Signed-off-by: Martin Liska <mliska@xxxxxxx> --- include/linux/compiler-gcc6.h | 59 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 include/linux/compiler-gcc6.h diff --git a/include/linux/compiler-gcc6.h b/include/linux/compiler-gcc6.h new file mode 100644 index 0000000..ba064fa --- /dev/null +++ b/include/linux/compiler-gcc6.h @@ -0,0 +1,59 @@ +#ifndef __LINUX_COMPILER_H +#error "Please don't include <linux/compiler-gcc6.h> directly, include <linux/compiler.h> instead." +#endif + +#define __used __attribute__((__used__)) +#define __must_check __attribute__((warn_unused_result)) +#define __compiler_offsetof(a, b) __builtin_offsetof(a, b) + +/* Mark functions as cold. gcc will assume any path leading to a call + to them will be unlikely. This means a lot of manual unlikely()s + are unnecessary now for any paths leading to the usual suspects + like BUG(), printk(), panic() etc. [but let's keep them for now for + older compilers] + + gcc also has a __attribute__((__hot__)) to move hot functions into + a special section, but I don't see any sense in this right now in + the kernel context */ +#define __cold __attribute__((__cold__)) + +#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) + +#ifndef __CHECKER__ +# define __compiletime_warning(message) __attribute__((warning(message))) +# define __compiletime_error(message) __attribute__((error(message))) +#endif /* __CHECKER__ */ + +/* + * Mark a position in code as unreachable. This can be used to + * suppress control flow warnings after asm blocks that transfer + * control elsewhere. + */ +#define unreachable() __builtin_unreachable() + +/* Mark a function definition as prohibited from being cloned. */ +#define __noclone __attribute__((__noclone__)) + +/* + * Tell the optimizer that something else uses this function or variable. + */ +#define __visible __attribute__((externally_visible)) + +/* + * GCC 'asm goto' miscompiles certain code sequences: + * + * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 + * + * Work it around via a compiler barrier quirk suggested by Jakub Jelinek. + * + * (asm goto is automatically volatile - the naming reflects this.) + */ +#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) + +#ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP +#define __HAVE_BUILTIN_BSWAP32__ +#define __HAVE_BUILTIN_BSWAP64__ +#define __HAVE_BUILTIN_BSWAP16__ +#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ + +#define KASAN_ABI_VERSION 4 -- 2.1.4
