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 * 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 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 __copy 234 # define __copy(symbol) 235 #endif 236 237 #ifndef __randomize_layout 238 # define __randomize_layout __designated_init 239 #endif 240 241 #ifndef __no_randomize_layout 242 # define __no_randomize_layout 243 #endif 244 245 #ifndef randomized_struct_fields_start 246 # define randomized_struct_fields_start 247 # define randomized_struct_fields_end 248 #endif 249 250 /* 251 * Tell gcc if a function is cold. The compiler will assume any path 252 * directly leading to the call is unlikely. 253 */ 254 255 #ifndef __cold 256 #define __cold 257 #endif 258 259 /* Simple shorthand for a section definition */ 260 #ifndef __section 261 # define __section(S) __attribute__ ((__section__(#S))) 262 #endif 263 264 #ifndef __visible 265 #define __visible 266 #endif 267 268 #ifndef __nostackprotector 269 # define __nostackprotector 270 #endif 271 272 #ifndef __norecordmcount 273 #define __norecordmcount 274 #endif 275 276 #ifndef __nocfi 277 #define __nocfi 278 #endif 279 280 /* 281 * Assume alignment of return value. 282 */ 283 #ifndef __assume_aligned 284 #define __assume_aligned(a, ...) 285 #endif 286 287 288 /* Are two types/vars the same type (ignoring qualifiers)? */ 289 #ifndef __same_type 290 # define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) 291 #endif 292 293 /* Is this type a native word size -- useful for atomic operations */ 294 #ifndef __native_word 295 # define __native_word(t) (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long)) 296 #endif 297 298 #endif /* __LINUX_COMPILER_TYPES_H */ 299