diff options
Diffstat (limited to 'include/linux/compiler-gcc4.h')
-rw-r--r-- | include/linux/compiler-gcc4.h | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h deleted file mode 100644 index 769e19864632..000000000000 --- a/include/linux/compiler-gcc4.h +++ /dev/null | |||
@@ -1,91 +0,0 @@ | |||
1 | #ifndef __LINUX_COMPILER_H | ||
2 | #error "Please don't include <linux/compiler-gcc4.h> directly, include <linux/compiler.h> instead." | ||
3 | #endif | ||
4 | |||
5 | /* GCC 4.1.[01] miscompiles __weak */ | ||
6 | #ifdef __KERNEL__ | ||
7 | # if GCC_VERSION >= 40100 && GCC_VERSION <= 40101 | ||
8 | # error Your version of gcc miscompiles the __weak directive | ||
9 | # endif | ||
10 | #endif | ||
11 | |||
12 | #define __used __attribute__((__used__)) | ||
13 | #define __must_check __attribute__((warn_unused_result)) | ||
14 | #define __compiler_offsetof(a,b) __builtin_offsetof(a,b) | ||
15 | |||
16 | #if GCC_VERSION >= 40100 && GCC_VERSION < 40600 | ||
17 | # define __compiletime_object_size(obj) __builtin_object_size(obj, 0) | ||
18 | #endif | ||
19 | |||
20 | #if GCC_VERSION >= 40300 | ||
21 | /* Mark functions as cold. gcc will assume any path leading to a call | ||
22 | to them will be unlikely. This means a lot of manual unlikely()s | ||
23 | are unnecessary now for any paths leading to the usual suspects | ||
24 | like BUG(), printk(), panic() etc. [but let's keep them for now for | ||
25 | older compilers] | ||
26 | |||
27 | Early snapshots of gcc 4.3 don't support this and we can't detect this | ||
28 | in the preprocessor, but we can live with this because they're unreleased. | ||
29 | Maketime probing would be overkill here. | ||
30 | |||
31 | gcc also has a __attribute__((__hot__)) to move hot functions into | ||
32 | a special section, but I don't see any sense in this right now in | ||
33 | the kernel context */ | ||
34 | #define __cold __attribute__((__cold__)) | ||
35 | |||
36 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) | ||
37 | |||
38 | #ifndef __CHECKER__ | ||
39 | # define __compiletime_warning(message) __attribute__((warning(message))) | ||
40 | # define __compiletime_error(message) __attribute__((error(message))) | ||
41 | #endif /* __CHECKER__ */ | ||
42 | #endif /* GCC_VERSION >= 40300 */ | ||
43 | |||
44 | #if GCC_VERSION >= 40500 | ||
45 | /* | ||
46 | * Mark a position in code as unreachable. This can be used to | ||
47 | * suppress control flow warnings after asm blocks that transfer | ||
48 | * control elsewhere. | ||
49 | * | ||
50 | * Early snapshots of gcc 4.5 don't support this and we can't detect | ||
51 | * this in the preprocessor, but we can live with this because they're | ||
52 | * unreleased. Really, we need to have autoconf for the kernel. | ||
53 | */ | ||
54 | #define unreachable() __builtin_unreachable() | ||
55 | |||
56 | /* Mark a function definition as prohibited from being cloned. */ | ||
57 | #define __noclone __attribute__((__noclone__)) | ||
58 | |||
59 | #endif /* GCC_VERSION >= 40500 */ | ||
60 | |||
61 | #if GCC_VERSION >= 40600 | ||
62 | /* | ||
63 | * Tell the optimizer that something else uses this function or variable. | ||
64 | */ | ||
65 | #define __visible __attribute__((externally_visible)) | ||
66 | #endif | ||
67 | |||
68 | /* | ||
69 | * GCC 'asm goto' miscompiles certain code sequences: | ||
70 | * | ||
71 | * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 | ||
72 | * | ||
73 | * Work it around via a compiler barrier quirk suggested by Jakub Jelinek. | ||
74 | * | ||
75 | * (asm goto is automatically volatile - the naming reflects this.) | ||
76 | */ | ||
77 | #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) | ||
78 | |||
79 | #ifdef CONFIG_ARCH_USE_BUILTIN_BSWAP | ||
80 | #if GCC_VERSION >= 40400 | ||
81 | #define __HAVE_BUILTIN_BSWAP32__ | ||
82 | #define __HAVE_BUILTIN_BSWAP64__ | ||
83 | #endif | ||
84 | #if GCC_VERSION >= 40800 || (defined(__powerpc__) && GCC_VERSION >= 40600) | ||
85 | #define __HAVE_BUILTIN_BSWAP16__ | ||
86 | #endif | ||
87 | #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ | ||
88 | |||
89 | #if GCC_VERSION >= 40902 | ||
90 | #define KASAN_ABI_VERSION 3 | ||
91 | #endif | ||