diff options
| author | Stefano Babic <sbabic@denx.de> | 2015-02-13 11:17:01 +0100 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-02-13 11:17:01 +0100 |
| commit | e72d344386bf80738fab7a6bd37cb321f443093a (patch) | |
| tree | d3e02055e6aa903ab80ef87c78d2f38e93981dcf /include/linux | |
| parent | 258c98f8d36ef35d7cb7604847ba73e64d702c2a (diff) | |
| parent | bd2a4888b123713adec271d6c8040ca9f609aa2f (diff) | |
Merge branch 'master' of git://git.denx.de/u-boot
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/compat.h | 1 | ||||
| -rw-r--r-- | include/linux/compiler-gcc5.h | 65 |
2 files changed, 65 insertions, 1 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index b40133cb3c..6eac17f0b6 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -262,7 +262,6 @@ typedef struct { /* from include/linux/types.h */ -typedef int atomic_t; /** * struct callback_head - callback structure for use with RCU and task_work * @next: next update requests in a list diff --git a/include/linux/compiler-gcc5.h b/include/linux/compiler-gcc5.h new file mode 100644 index 0000000000..c8c5659525 --- /dev/null +++ b/include/linux/compiler-gcc5.h @@ -0,0 +1,65 @@ +#ifndef __LINUX_COMPILER_H +#error "Please don't include <linux/compiler-gcc5.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] + + Early snapshots of gcc 4.3 don't support this and we can't detect this + in the preprocessor, but we can live with this because they're unreleased. + Maketime probing would be overkill here. + + 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. + * + * Early snapshots of gcc 4.5 don't support this and we can't detect + * this in the preprocessor, but we can live with this because they're + * unreleased. Really, we need to have autoconf for the kernel. + */ +#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 */ |
