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 81 /* 82 * Generic compiler-dependent macros required for kernel 83 * build go below this comment. Actual compiler/compiler version 84 * specific implementations come from the above header files 85 */ 86 87 struct ftrace_branch_data { 88 const char *func; 89 const char *file; 90 unsigned line; 91 union { 92 struct { 93 unsigned long correct; 94 unsigned long incorrect; 95 }; 96 struct { 97 unsigned long miss; 98 unsigned long hit; 99 }; 100 unsigned long miss_hit[2]; 101 }; 102 }; 103 104 struct ftrace_likely_data { 105 struct ftrace_branch_data data; 106 unsigned long constant; 107 }; 108 109 #endif /* __KERNEL__ */ 110 111 #endif /* __ASSEMBLY__ */ 112 113 #ifdef __KERNEL__ 114 115 /* Don't. Just don't. */ 116 #define __deprecated 117 #define __deprecated_for_modules 118 119 #ifndef __must_check 120 #define __must_check 121 #endif 122 123 #ifndef CONFIG_ENABLE_MUST_CHECK 124 #undef __must_check 125 #define __must_check 126 #endif 127 128 #ifndef __malloc 129 #define __malloc 130 #endif 131 132 /* 133 * Allow us to avoid 'defined but not used' warnings on functions and data, 134 * as well as force them to be emitted to the assembly file. 135 * 136 * As of gcc 3.4, static functions that are not marked with attribute((used)) 137 * may be elided from the assembly file. As of gcc 3.4, static data not so 138 * marked will not be elided, but this may change in a future gcc version. 139 * 140 * NOTE: Because distributions shipped with a backported unit-at-a-time 141 * compiler in gcc 3.3, we must define __used to be __attribute__((used)) 142 * for gcc >=3.3 instead of 3.4. 143 * 144 * In prior versions of gcc, such functions and data would be emitted, but 145 * would be warned about except with attribute((unused)). 146 * 147 * Mark functions that are referenced only in inline assembly as __used so 148 * the code is emitted even though it appears to be unreferenced. 149 */ 150 #ifndef __used 151 # define __used /* unimplemented */ 152 #endif 153 154 #ifndef __maybe_unused 155 # define __maybe_unused /* unimplemented */ 156 #endif 157 158 #ifndef __always_unused 159 # define __always_unused /* unimplemented */ 160 #endif 161 162 #ifndef noinline 163 #define noinline 164 #endif 165 166 /* 167 * Rather then using noinline to prevent stack consumption, use 168 * noinline_for_stack instead. For documentation reasons. 169 */ 170 #define noinline_for_stack noinline 171 172 #ifndef __always_inline 173 #define __always_inline inline 174 #endif 175 176 #endif /* __KERNEL__ */ 177 178 /* 179 * From the GCC manual: 180 * 181 * Many functions do not examine any values except their arguments, 182 * and have no effects except the return value. Basically this is 183 * just slightly more strict class than the `pure' attribute above, 184 * since function is not allowed to read global memory. 185 * 186 * Note that a function that has pointer arguments and examines the 187 * data pointed to must _not_ be declared `const'. Likewise, a 188 * function that calls a non-`const' function usually must not be 189 * `const'. It does not make sense for a `const' function to return 190 * `void'. 191 */ 192 #ifndef __attribute_const__ 193 # define __attribute_const__ /* unimplemented */ 194 #endif 195 196 #ifndef __designated_init 197 # define __designated_init 198 #endif 199 200 #ifndef __latent_entropy 201 # define __latent_entropy 202 #endif 203 204 #ifndef __randomize_layout 205 # define __randomize_layout __designated_init 206 #endif 207 208 #ifndef __no_randomize_layout 209 # define __no_randomize_layout 210 #endif 211 212 #ifndef randomized_struct_fields_start 213 # define randomized_struct_fields_start 214 # define randomized_struct_fields_end 215 #endif 216 217 /* 218 * Tell gcc if a function is cold. The compiler will assume any path 219 * directly leading to the call is unlikely. 220 */ 221 222 #ifndef __cold 223 #define __cold 224 #endif 225 226 /* Simple shorthand for a section definition */ 227 #ifndef __section 228 # define __section(S) __attribute__ ((__section__(#S))) 229 #endif 230 231 #ifndef __visible 232 #define __visible 233 #endif 234 235 #ifndef __nostackprotector 236 # define __nostackprotector 237 #endif 238 239 /* 240 * Assume alignment of return value. 241 */ 242 #ifndef __assume_aligned 243 #define __assume_aligned(a, ...) 244 #endif 245 246 247 /* Are two types/vars the same type (ignoring qualifiers)? */ 248 #ifndef __same_type 249 # define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) 250 #endif 251 252 /* Is this type a native word size -- useful for atomic operations */ 253 #ifndef __native_word 254 # define __native_word(t) (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long)) 255 #endif 256 257 #ifndef __diag 258 #define __diag(string) 259 #endif 260 261 #ifndef __diag_GCC 262 #define __diag_GCC(version, severity, string) 263 #endif 264 265 #define __diag_push() __diag(push) 266 #define __diag_pop() __diag(pop) 267 268 #define __diag_ignore(compiler, version, option, comment) \ 269 __diag_ ## compiler(version, ignore, option) 270 #define __diag_warn(compiler, version, option, comment) \ 271 __diag_ ## compiler(version, warn, option) 272 #define __diag_error(compiler, version, option, comment) \ 273 __diag_ ## compiler(version, error, option) 274 275 #endif /* __LINUX_COMPILER_TYPES_H */ 276