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d1515582 WD |
1 | #ifndef __LINUX_COMPILER_TYPES_H |
2 | #define __LINUX_COMPILER_TYPES_H | |
3 | ||
4 | #ifndef __ASSEMBLY__ | |
5 | ||
6 | #ifdef __CHECKER__ | |
7 | # define __user __attribute__((noderef, address_space(1))) | |
8 | # define __kernel __attribute__((address_space(0))) | |
9 | # define __safe __attribute__((safe)) | |
10 | # define __force __attribute__((force)) | |
11 | # define __nocast __attribute__((nocast)) | |
12 | # define __iomem __attribute__((noderef, address_space(2))) | |
13 | # define __must_hold(x) __attribute__((context(x,1,1))) | |
14 | # define __acquires(x) __attribute__((context(x,0,1))) | |
15 | # define __releases(x) __attribute__((context(x,1,0))) | |
16 | # define __acquire(x) __context__(x,1) | |
17 | # define __release(x) __context__(x,-1) | |
18 | # define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0) | |
19 | # define __percpu __attribute__((noderef, address_space(3))) | |
20 | # define __rcu __attribute__((noderef, address_space(4))) | |
21 | # define __private __attribute__((noderef)) | |
22 | extern void __chk_user_ptr(const volatile void __user *); | |
23 | extern void __chk_io_ptr(const volatile void __iomem *); | |
24 | # define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member)) | |
25 | #else /* __CHECKER__ */ | |
26 | # ifdef STRUCTLEAK_PLUGIN | |
27 | # define __user __attribute__((user)) | |
28 | # else | |
29 | # define __user | |
30 | # endif | |
31 | # define __kernel | |
32 | # define __safe | |
33 | # define __force | |
34 | # define __nocast | |
35 | # define __iomem | |
36 | # define __chk_user_ptr(x) (void)0 | |
37 | # define __chk_io_ptr(x) (void)0 | |
38 | # define __builtin_warning(x, y...) (1) | |
39 | # define __must_hold(x) | |
40 | # define __acquires(x) | |
41 | # define __releases(x) | |
42 | # define __acquire(x) (void)0 | |
43 | # define __release(x) (void)0 | |
44 | # define __cond_lock(x,c) (c) | |
45 | # define __percpu | |
46 | # define __rcu | |
47 | # define __private | |
48 | # define ACCESS_PRIVATE(p, member) ((p)->member) | |
49 | #endif /* __CHECKER__ */ | |
50 | ||
51 | /* Indirect macros required for expanded argument pasting, eg. __LINE__. */ | |
52 | #define ___PASTE(a,b) a##b | |
53 | #define __PASTE(a,b) ___PASTE(a,b) | |
54 | ||
55 | #ifdef __KERNEL__ | |
56 | ||
57 | #ifdef __GNUC__ | |
58 | #include <linux/compiler-gcc.h> | |
59 | #endif | |
60 | ||
61 | #if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__) | |
62 | #define notrace __attribute__((hotpatch(0,0))) | |
63 | #else | |
64 | #define notrace __attribute__((no_instrument_function)) | |
65 | #endif | |
66 | ||
67 | /* Intel compiler defines __GNUC__. So we will overwrite implementations | |
68 | * coming from above header files here | |
69 | */ | |
70 | #ifdef __INTEL_COMPILER | |
71 | # include <linux/compiler-intel.h> | |
72 | #endif | |
73 | ||
74 | /* Clang compiler defines __GNUC__. So we will overwrite implementations | |
75 | * coming from above header files here | |
76 | */ | |
77 | #ifdef __clang__ | |
78 | #include <linux/compiler-clang.h> | |
79 | #endif | |
80 | ||
ea901787 PB |
81 | /* |
82 | * Some architectures need to provide custom definitions of macros provided | |
83 | * by linux/compiler-*.h, and can do so using asm/compiler.h. We include that | |
84 | * conditionally rather than using an asm-generic wrapper in order to avoid | |
85 | * build failures if any C compilation, which will include this file via an | |
86 | * -include argument in c_flags, occurs prior to the asm-generic wrappers being | |
87 | * generated. | |
88 | */ | |
89 | #ifdef CONFIG_HAVE_ARCH_COMPILER_H | |
90 | #include <asm/compiler.h> | |
91 | #endif | |
92 | ||
d1515582 WD |
93 | /* |
94 | * Generic compiler-dependent macros required for kernel | |
95 | * build go below this comment. Actual compiler/compiler version | |
96 | * specific implementations come from the above header files | |
97 | */ | |
98 | ||
99 | struct ftrace_branch_data { | |
100 | const char *func; | |
101 | const char *file; | |
102 | unsigned line; | |
103 | union { | |
104 | struct { | |
105 | unsigned long correct; | |
106 | unsigned long incorrect; | |
107 | }; | |
108 | struct { | |
109 | unsigned long miss; | |
110 | unsigned long hit; | |
111 | }; | |
112 | unsigned long miss_hit[2]; | |
113 | }; | |
114 | }; | |
115 | ||
116 | struct ftrace_likely_data { | |
117 | struct ftrace_branch_data data; | |
118 | unsigned long constant; | |
119 | }; | |
120 | ||
121 | #endif /* __KERNEL__ */ | |
122 | ||
123 | #endif /* __ASSEMBLY__ */ | |
124 | ||
125 | #ifdef __KERNEL__ | |
126 | /* | |
127 | * Allow us to mark functions as 'deprecated' and have gcc emit a nice | |
128 | * warning for each use, in hopes of speeding the functions removal. | |
129 | * Usage is: | |
130 | * int __deprecated foo(void) | |
131 | */ | |
132 | #ifndef __deprecated | |
133 | # define __deprecated /* unimplemented */ | |
134 | #endif | |
135 | ||
136 | #ifdef MODULE | |
137 | #define __deprecated_for_modules __deprecated | |
138 | #else | |
139 | #define __deprecated_for_modules | |
140 | #endif | |
141 | ||
142 | #ifndef __must_check | |
143 | #define __must_check | |
144 | #endif | |
145 | ||
146 | #ifndef CONFIG_ENABLE_MUST_CHECK | |
147 | #undef __must_check | |
148 | #define __must_check | |
149 | #endif | |
150 | #ifndef CONFIG_ENABLE_WARN_DEPRECATED | |
151 | #undef __deprecated | |
152 | #undef __deprecated_for_modules | |
153 | #define __deprecated | |
154 | #define __deprecated_for_modules | |
155 | #endif | |
156 | ||
157 | #ifndef __malloc | |
158 | #define __malloc | |
159 | #endif | |
160 | ||
161 | /* | |
162 | * Allow us to avoid 'defined but not used' warnings on functions and data, | |
163 | * as well as force them to be emitted to the assembly file. | |
164 | * | |
165 | * As of gcc 3.4, static functions that are not marked with attribute((used)) | |
166 | * may be elided from the assembly file. As of gcc 3.4, static data not so | |
167 | * marked will not be elided, but this may change in a future gcc version. | |
168 | * | |
169 | * NOTE: Because distributions shipped with a backported unit-at-a-time | |
170 | * compiler in gcc 3.3, we must define __used to be __attribute__((used)) | |
171 | * for gcc >=3.3 instead of 3.4. | |
172 | * | |
173 | * In prior versions of gcc, such functions and data would be emitted, but | |
174 | * would be warned about except with attribute((unused)). | |
175 | * | |
176 | * Mark functions that are referenced only in inline assembly as __used so | |
177 | * the code is emitted even though it appears to be unreferenced. | |
178 | */ | |
179 | #ifndef __used | |
180 | # define __used /* unimplemented */ | |
181 | #endif | |
182 | ||
183 | #ifndef __maybe_unused | |
184 | # define __maybe_unused /* unimplemented */ | |
185 | #endif | |
186 | ||
187 | #ifndef __always_unused | |
188 | # define __always_unused /* unimplemented */ | |
189 | #endif | |
190 | ||
191 | #ifndef noinline | |
192 | #define noinline | |
193 | #endif | |
194 | ||
195 | /* | |
196 | * Rather then using noinline to prevent stack consumption, use | |
197 | * noinline_for_stack instead. For documentation reasons. | |
198 | */ | |
199 | #define noinline_for_stack noinline | |
200 | ||
201 | #ifndef __always_inline | |
202 | #define __always_inline inline | |
203 | #endif | |
204 | ||
205 | #endif /* __KERNEL__ */ | |
206 | ||
207 | /* | |
208 | * From the GCC manual: | |
209 | * | |
210 | * Many functions do not examine any values except their arguments, | |
211 | * and have no effects except the return value. Basically this is | |
212 | * just slightly more strict class than the `pure' attribute above, | |
213 | * since function is not allowed to read global memory. | |
214 | * | |
215 | * Note that a function that has pointer arguments and examines the | |
216 | * data pointed to must _not_ be declared `const'. Likewise, a | |
217 | * function that calls a non-`const' function usually must not be | |
218 | * `const'. It does not make sense for a `const' function to return | |
219 | * `void'. | |
220 | */ | |
221 | #ifndef __attribute_const__ | |
222 | # define __attribute_const__ /* unimplemented */ | |
223 | #endif | |
224 | ||
225 | #ifndef __designated_init | |
226 | # define __designated_init | |
227 | #endif | |
228 | ||
229 | #ifndef __latent_entropy | |
230 | # define __latent_entropy | |
231 | #endif | |
232 | ||
233 | #ifndef __randomize_layout | |
234 | # define __randomize_layout __designated_init | |
235 | #endif | |
236 | ||
237 | #ifndef __no_randomize_layout | |
238 | # define __no_randomize_layout | |
239 | #endif | |
240 | ||
241 | #ifndef randomized_struct_fields_start | |
242 | # define randomized_struct_fields_start | |
243 | # define randomized_struct_fields_end | |
244 | #endif | |
245 | ||
246 | /* | |
247 | * Tell gcc if a function is cold. The compiler will assume any path | |
248 | * directly leading to the call is unlikely. | |
249 | */ | |
250 | ||
251 | #ifndef __cold | |
252 | #define __cold | |
253 | #endif | |
254 | ||
255 | /* Simple shorthand for a section definition */ | |
256 | #ifndef __section | |
257 | # define __section(S) __attribute__ ((__section__(#S))) | |
258 | #endif | |
259 | ||
260 | #ifndef __visible | |
261 | #define __visible | |
262 | #endif | |
263 | ||
264 | #ifndef __nostackprotector | |
265 | # define __nostackprotector | |
266 | #endif | |
267 | ||
268 | /* | |
269 | * Assume alignment of return value. | |
270 | */ | |
271 | #ifndef __assume_aligned | |
272 | #define __assume_aligned(a, ...) | |
273 | #endif | |
274 | ||
275 | ||
276 | /* Are two types/vars the same type (ignoring qualifiers)? */ | |
277 | #ifndef __same_type | |
278 | # define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) | |
279 | #endif | |
280 | ||
281 | /* Is this type a native word size -- useful for atomic operations */ | |
282 | #ifndef __native_word | |
283 | # define __native_word(t) (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long)) | |
284 | #endif | |
285 | ||
286 | #endif /* __LINUX_COMPILER_TYPES_H */ |