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 /* Compiler specific macros. */ 58 #ifdef __clang__ 59 #include <linux/compiler-clang.h> 60 #elif defined(__INTEL_COMPILER) 61 #include <linux/compiler-intel.h> 62 #elif defined(__GNUC__) 63 /* The above compilers also define __GNUC__, so order is important here. */ 64 #include <linux/compiler-gcc.h> 65 #else 66 #error "Unknown compiler" 67 #endif 68 69 /* 70 * Some architectures need to provide custom definitions of macros provided 71 * by linux/compiler-*.h, and can do so using asm/compiler.h. We include that 72 * conditionally rather than using an asm-generic wrapper in order to avoid 73 * build failures if any C compilation, which will include this file via an 74 * -include argument in c_flags, occurs prior to the asm-generic wrappers being 75 * generated. 76 */ 77 #ifdef CONFIG_HAVE_ARCH_COMPILER_H 78 #include <asm/compiler.h> 79 #endif 80 81 /* 82 * Generic compiler-independent 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 /* Don't. Just don't. */ 110 #define __deprecated 111 #define __deprecated_for_modules 112 113 #endif /* __KERNEL__ */ 114 115 #endif /* __ASSEMBLY__ */ 116 117 /* 118 * The below symbols may be defined for one or more, but not ALL, of the above 119 * compilers. We don't consider that to be an error, so set them to nothing. 120 * For example, some of them are for compiler specific plugins. 121 */ 122 #ifndef __designated_init 123 # define __designated_init 124 #endif 125 126 #ifndef __latent_entropy 127 # define __latent_entropy 128 #endif 129 130 #ifndef __randomize_layout 131 # define __randomize_layout __designated_init 132 #endif 133 134 #ifndef __no_randomize_layout 135 # define __no_randomize_layout 136 #endif 137 138 #ifndef randomized_struct_fields_start 139 # define randomized_struct_fields_start 140 # define randomized_struct_fields_end 141 #endif 142 143 #ifndef __visible 144 #define __visible 145 #endif 146 147 /* 148 * Assume alignment of return value. 149 */ 150 #ifndef __assume_aligned 151 #define __assume_aligned(a, ...) 152 #endif 153 154 /* Are two types/vars the same type (ignoring qualifiers)? */ 155 #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b)) 156 157 /* Is this type a native word size -- useful for atomic operations */ 158 #define __native_word(t) \ 159 (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \ 160 sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long)) 161 162 #ifndef __attribute_const__ 163 #define __attribute_const__ __attribute__((__const__)) 164 #endif 165 166 #ifndef __noclone 167 #define __noclone 168 #endif 169 170 /* Helpers for emitting diagnostics in pragmas. */ 171 #ifndef __diag 172 #define __diag(string) 173 #endif 174 175 #ifndef __diag_GCC 176 #define __diag_GCC(version, severity, string) 177 #endif 178 179 #define __diag_push() __diag(push) 180 #define __diag_pop() __diag(pop) 181 182 #define __diag_ignore(compiler, version, option, comment) \ 183 __diag_ ## compiler(version, ignore, option) 184 #define __diag_warn(compiler, version, option, comment) \ 185 __diag_ ## compiler(version, warn, option) 186 #define __diag_error(compiler, version, option, comment) \ 187 __diag_ ## compiler(version, error, option) 188 189 /* 190 * From the GCC manual: 191 * 192 * Many functions have no effects except the return value and their 193 * return value depends only on the parameters and/or global 194 * variables. Such a function can be subject to common subexpression 195 * elimination and loop optimization just as an arithmetic operator 196 * would be. 197 * [...] 198 */ 199 #define __pure __attribute__((pure)) 200 #define __aligned(x) __attribute__((aligned(x))) 201 #define __aligned_largest __attribute__((aligned)) 202 #define __printf(a, b) __attribute__((format(printf, a, b))) 203 #define __scanf(a, b) __attribute__((format(scanf, a, b))) 204 #define __maybe_unused __attribute__((unused)) 205 #define __always_unused __attribute__((unused)) 206 #define __mode(x) __attribute__((mode(x))) 207 #define __malloc __attribute__((__malloc__)) 208 #define __used __attribute__((__used__)) 209 #define __noreturn __attribute__((noreturn)) 210 #define __packed __attribute__((packed)) 211 #define __weak __attribute__((weak)) 212 #define __alias(symbol) __attribute__((alias(#symbol))) 213 #define __cold __attribute__((cold)) 214 #define __section(S) __attribute__((__section__(#S))) 215 216 217 #ifdef CONFIG_ENABLE_MUST_CHECK 218 #define __must_check __attribute__((warn_unused_result)) 219 #else 220 #define __must_check 221 #endif 222 223 #if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__) 224 #define notrace __attribute__((hotpatch(0, 0))) 225 #else 226 #define notrace __attribute__((no_instrument_function)) 227 #endif 228 229 /* 230 * it doesn't make sense on ARM (currently the only user of __naked) 231 * to trace naked functions because then mcount is called without 232 * stack and frame pointer being set up and there is no chance to 233 * restore the lr register to the value before mcount was called. 234 */ 235 #define __naked __attribute__((naked)) notrace 236 237 #define __compiler_offsetof(a, b) __builtin_offsetof(a, b) 238 239 /* 240 * Feature detection for gnu_inline (gnu89 extern inline semantics). Either 241 * __GNUC_STDC_INLINE__ is defined (not using gnu89 extern inline semantics, 242 * and we opt in to the gnu89 semantics), or __GNUC_STDC_INLINE__ is not 243 * defined so the gnu89 semantics are the default. 244 */ 245 #ifdef __GNUC_STDC_INLINE__ 246 # define __gnu_inline __attribute__((gnu_inline)) 247 #else 248 # define __gnu_inline 249 #endif 250 251 /* 252 * Force always-inline if the user requests it so via the .config. 253 * GCC does not warn about unused static inline functions for 254 * -Wunused-function. This turns out to avoid the need for complex #ifdef 255 * directives. Suppress the warning in clang as well by using "unused" 256 * function attribute, which is redundant but not harmful for gcc. 257 * Prefer gnu_inline, so that extern inline functions do not emit an 258 * externally visible function. This makes extern inline behave as per gnu89 259 * semantics rather than c99. This prevents multiple symbol definition errors 260 * of extern inline functions at link time. 261 * A lot of inline functions can cause havoc with function tracing. 262 */ 263 #if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \ 264 !defined(CONFIG_OPTIMIZE_INLINING) 265 #define inline \ 266 inline __attribute__((always_inline, unused)) notrace __gnu_inline 267 #else 268 #define inline inline __attribute__((unused)) notrace __gnu_inline 269 #endif 270 271 #define __inline__ inline 272 #define __inline inline 273 #define noinline __attribute__((noinline)) 274 275 #ifndef __always_inline 276 #define __always_inline inline __attribute__((always_inline)) 277 #endif 278 279 /* 280 * Rather then using noinline to prevent stack consumption, use 281 * noinline_for_stack instead. For documentation reasons. 282 */ 283 #define noinline_for_stack noinline 284 285 #endif /* __LINUX_COMPILER_TYPES_H */ 286
