Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ARCH_X86_64_ATOMIC__ |
| 2 | #define __ARCH_X86_64_ATOMIC__ |
| 3 | |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 4 | #include <asm/alternative.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | |
| 6 | /* atomic_t should be 32 bit signed type */ |
| 7 | |
| 8 | /* |
| 9 | * Atomic operations that C can't guarantee us. Useful for |
| 10 | * resource counting etc.. |
| 11 | */ |
| 12 | |
| 13 | #ifdef CONFIG_SMP |
| 14 | #define LOCK "lock ; " |
| 15 | #else |
| 16 | #define LOCK "" |
| 17 | #endif |
| 18 | |
| 19 | /* |
| 20 | * Make sure gcc doesn't try to be clever and move things around |
| 21 | * on us. We need to use _exactly_ the address the user gave us, |
| 22 | * not some alias that contains the same information. |
| 23 | */ |
Linus Torvalds | f9e9dcb | 2006-12-06 14:42:57 -0800 | [diff] [blame] | 24 | typedef struct { int counter; } atomic_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | #define ATOMIC_INIT(i) { (i) } |
| 27 | |
| 28 | /** |
| 29 | * atomic_read - read atomic variable |
| 30 | * @v: pointer of type atomic_t |
| 31 | * |
| 32 | * Atomically reads the value of @v. |
| 33 | */ |
| 34 | #define atomic_read(v) ((v)->counter) |
| 35 | |
| 36 | /** |
| 37 | * atomic_set - set atomic variable |
| 38 | * @v: pointer of type atomic_t |
| 39 | * @i: required value |
| 40 | * |
| 41 | * Atomically sets the value of @v to @i. |
| 42 | */ |
| 43 | #define atomic_set(v,i) (((v)->counter) = (i)) |
| 44 | |
| 45 | /** |
| 46 | * atomic_add - add integer to atomic variable |
| 47 | * @i: integer value to add |
| 48 | * @v: pointer of type atomic_t |
| 49 | * |
| 50 | * Atomically adds @i to @v. |
| 51 | */ |
| 52 | static __inline__ void atomic_add(int i, atomic_t *v) |
| 53 | { |
| 54 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 55 | LOCK_PREFIX "addl %1,%0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | :"=m" (v->counter) |
| 57 | :"ir" (i), "m" (v->counter)); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * atomic_sub - subtract the atomic variable |
| 62 | * @i: integer value to subtract |
| 63 | * @v: pointer of type atomic_t |
| 64 | * |
| 65 | * Atomically subtracts @i from @v. |
| 66 | */ |
| 67 | static __inline__ void atomic_sub(int i, atomic_t *v) |
| 68 | { |
| 69 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 70 | LOCK_PREFIX "subl %1,%0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | :"=m" (v->counter) |
| 72 | :"ir" (i), "m" (v->counter)); |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * atomic_sub_and_test - subtract value from variable and test result |
| 77 | * @i: integer value to subtract |
| 78 | * @v: pointer of type atomic_t |
| 79 | * |
| 80 | * Atomically subtracts @i from @v and returns |
| 81 | * true if the result is zero, or false for all |
| 82 | * other cases. |
| 83 | */ |
| 84 | static __inline__ int atomic_sub_and_test(int i, atomic_t *v) |
| 85 | { |
| 86 | unsigned char c; |
| 87 | |
| 88 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 89 | LOCK_PREFIX "subl %2,%0; sete %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | :"=m" (v->counter), "=qm" (c) |
| 91 | :"ir" (i), "m" (v->counter) : "memory"); |
| 92 | return c; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * atomic_inc - increment atomic variable |
| 97 | * @v: pointer of type atomic_t |
| 98 | * |
| 99 | * Atomically increments @v by 1. |
| 100 | */ |
| 101 | static __inline__ void atomic_inc(atomic_t *v) |
| 102 | { |
| 103 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 104 | LOCK_PREFIX "incl %0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | :"=m" (v->counter) |
| 106 | :"m" (v->counter)); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * atomic_dec - decrement atomic variable |
| 111 | * @v: pointer of type atomic_t |
| 112 | * |
| 113 | * Atomically decrements @v by 1. |
| 114 | */ |
| 115 | static __inline__ void atomic_dec(atomic_t *v) |
| 116 | { |
| 117 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 118 | LOCK_PREFIX "decl %0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | :"=m" (v->counter) |
| 120 | :"m" (v->counter)); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * atomic_dec_and_test - decrement and test |
| 125 | * @v: pointer of type atomic_t |
| 126 | * |
| 127 | * Atomically decrements @v by 1 and |
| 128 | * returns true if the result is 0, or false for all other |
| 129 | * cases. |
| 130 | */ |
| 131 | static __inline__ int atomic_dec_and_test(atomic_t *v) |
| 132 | { |
| 133 | unsigned char c; |
| 134 | |
| 135 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 136 | LOCK_PREFIX "decl %0; sete %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | :"=m" (v->counter), "=qm" (c) |
| 138 | :"m" (v->counter) : "memory"); |
| 139 | return c != 0; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * atomic_inc_and_test - increment and test |
| 144 | * @v: pointer of type atomic_t |
| 145 | * |
| 146 | * Atomically increments @v by 1 |
| 147 | * and returns true if the result is zero, or false for all |
| 148 | * other cases. |
| 149 | */ |
| 150 | static __inline__ int atomic_inc_and_test(atomic_t *v) |
| 151 | { |
| 152 | unsigned char c; |
| 153 | |
| 154 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 155 | LOCK_PREFIX "incl %0; sete %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | :"=m" (v->counter), "=qm" (c) |
| 157 | :"m" (v->counter) : "memory"); |
| 158 | return c != 0; |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * atomic_add_negative - add and test if negative |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | * @i: integer value to add |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 164 | * @v: pointer of type atomic_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | * |
| 166 | * Atomically adds @i to @v and returns true |
| 167 | * if the result is negative, or false when |
| 168 | * result is greater than or equal to zero. |
| 169 | */ |
| 170 | static __inline__ int atomic_add_negative(int i, atomic_t *v) |
| 171 | { |
| 172 | unsigned char c; |
| 173 | |
| 174 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 175 | LOCK_PREFIX "addl %2,%0; sets %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | :"=m" (v->counter), "=qm" (c) |
| 177 | :"ir" (i), "m" (v->counter) : "memory"); |
| 178 | return c; |
| 179 | } |
| 180 | |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 181 | /** |
| 182 | * atomic_add_return - add and return |
| 183 | * @i: integer value to add |
| 184 | * @v: pointer of type atomic_t |
| 185 | * |
| 186 | * Atomically adds @i to @v and returns @i + @v |
| 187 | */ |
| 188 | static __inline__ int atomic_add_return(int i, atomic_t *v) |
| 189 | { |
| 190 | int __i = i; |
| 191 | __asm__ __volatile__( |
Andi Kleen | 9dc452b | 2006-12-07 02:14:13 +0100 | [diff] [blame] | 192 | LOCK_PREFIX "xaddl %0, %1" |
| 193 | :"+r" (i), "+m" (v->counter) |
| 194 | : : "memory"); |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 195 | return i + __i; |
| 196 | } |
| 197 | |
| 198 | static __inline__ int atomic_sub_return(int i, atomic_t *v) |
| 199 | { |
| 200 | return atomic_add_return(-i,v); |
| 201 | } |
| 202 | |
| 203 | #define atomic_inc_return(v) (atomic_add_return(1,v)) |
| 204 | #define atomic_dec_return(v) (atomic_sub_return(1,v)) |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | /* An 64bit atomic type */ |
| 207 | |
| 208 | typedef struct { volatile long counter; } atomic64_t; |
| 209 | |
| 210 | #define ATOMIC64_INIT(i) { (i) } |
| 211 | |
| 212 | /** |
| 213 | * atomic64_read - read atomic64 variable |
| 214 | * @v: pointer of type atomic64_t |
| 215 | * |
| 216 | * Atomically reads the value of @v. |
| 217 | * Doesn't imply a read memory barrier. |
| 218 | */ |
| 219 | #define atomic64_read(v) ((v)->counter) |
| 220 | |
| 221 | /** |
| 222 | * atomic64_set - set atomic64 variable |
| 223 | * @v: pointer to type atomic64_t |
| 224 | * @i: required value |
| 225 | * |
| 226 | * Atomically sets the value of @v to @i. |
| 227 | */ |
| 228 | #define atomic64_set(v,i) (((v)->counter) = (i)) |
| 229 | |
| 230 | /** |
| 231 | * atomic64_add - add integer to atomic64 variable |
| 232 | * @i: integer value to add |
| 233 | * @v: pointer to type atomic64_t |
| 234 | * |
| 235 | * Atomically adds @i to @v. |
| 236 | */ |
| 237 | static __inline__ void atomic64_add(long i, atomic64_t *v) |
| 238 | { |
| 239 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 240 | LOCK_PREFIX "addq %1,%0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | :"=m" (v->counter) |
| 242 | :"ir" (i), "m" (v->counter)); |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * atomic64_sub - subtract the atomic64 variable |
| 247 | * @i: integer value to subtract |
| 248 | * @v: pointer to type atomic64_t |
| 249 | * |
| 250 | * Atomically subtracts @i from @v. |
| 251 | */ |
| 252 | static __inline__ void atomic64_sub(long i, atomic64_t *v) |
| 253 | { |
| 254 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 255 | LOCK_PREFIX "subq %1,%0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | :"=m" (v->counter) |
| 257 | :"ir" (i), "m" (v->counter)); |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * atomic64_sub_and_test - subtract value from variable and test result |
| 262 | * @i: integer value to subtract |
| 263 | * @v: pointer to type atomic64_t |
| 264 | * |
| 265 | * Atomically subtracts @i from @v and returns |
| 266 | * true if the result is zero, or false for all |
| 267 | * other cases. |
| 268 | */ |
| 269 | static __inline__ int atomic64_sub_and_test(long i, atomic64_t *v) |
| 270 | { |
| 271 | unsigned char c; |
| 272 | |
| 273 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 274 | LOCK_PREFIX "subq %2,%0; sete %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | :"=m" (v->counter), "=qm" (c) |
| 276 | :"ir" (i), "m" (v->counter) : "memory"); |
| 277 | return c; |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * atomic64_inc - increment atomic64 variable |
| 282 | * @v: pointer to type atomic64_t |
| 283 | * |
| 284 | * Atomically increments @v by 1. |
| 285 | */ |
| 286 | static __inline__ void atomic64_inc(atomic64_t *v) |
| 287 | { |
| 288 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 289 | LOCK_PREFIX "incq %0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | :"=m" (v->counter) |
| 291 | :"m" (v->counter)); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * atomic64_dec - decrement atomic64 variable |
| 296 | * @v: pointer to type atomic64_t |
| 297 | * |
| 298 | * Atomically decrements @v by 1. |
| 299 | */ |
| 300 | static __inline__ void atomic64_dec(atomic64_t *v) |
| 301 | { |
| 302 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 303 | LOCK_PREFIX "decq %0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | :"=m" (v->counter) |
| 305 | :"m" (v->counter)); |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * atomic64_dec_and_test - decrement and test |
| 310 | * @v: pointer to type atomic64_t |
| 311 | * |
| 312 | * Atomically decrements @v by 1 and |
| 313 | * returns true if the result is 0, or false for all other |
| 314 | * cases. |
| 315 | */ |
| 316 | static __inline__ int atomic64_dec_and_test(atomic64_t *v) |
| 317 | { |
| 318 | unsigned char c; |
| 319 | |
| 320 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 321 | LOCK_PREFIX "decq %0; sete %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | :"=m" (v->counter), "=qm" (c) |
| 323 | :"m" (v->counter) : "memory"); |
| 324 | return c != 0; |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * atomic64_inc_and_test - increment and test |
| 329 | * @v: pointer to type atomic64_t |
| 330 | * |
| 331 | * Atomically increments @v by 1 |
| 332 | * and returns true if the result is zero, or false for all |
| 333 | * other cases. |
| 334 | */ |
| 335 | static __inline__ int atomic64_inc_and_test(atomic64_t *v) |
| 336 | { |
| 337 | unsigned char c; |
| 338 | |
| 339 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 340 | LOCK_PREFIX "incq %0; sete %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | :"=m" (v->counter), "=qm" (c) |
| 342 | :"m" (v->counter) : "memory"); |
| 343 | return c != 0; |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * atomic64_add_negative - add and test if negative |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | * @i: integer value to add |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 349 | * @v: pointer to type atomic64_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | * |
| 351 | * Atomically adds @i to @v and returns true |
| 352 | * if the result is negative, or false when |
| 353 | * result is greater than or equal to zero. |
| 354 | */ |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 355 | static __inline__ int atomic64_add_negative(long i, atomic64_t *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
| 357 | unsigned char c; |
| 358 | |
| 359 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 360 | LOCK_PREFIX "addq %2,%0; sets %1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | :"=m" (v->counter), "=qm" (c) |
| 362 | :"ir" (i), "m" (v->counter) : "memory"); |
| 363 | return c; |
| 364 | } |
| 365 | |
| 366 | /** |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 367 | * atomic64_add_return - add and return |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | * @i: integer value to add |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 369 | * @v: pointer to type atomic64_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | * |
| 371 | * Atomically adds @i to @v and returns @i + @v |
| 372 | */ |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 373 | static __inline__ long atomic64_add_return(long i, atomic64_t *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | { |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 375 | long __i = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | __asm__ __volatile__( |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 377 | LOCK_PREFIX "xaddq %0, %1;" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | :"=r"(i) |
| 379 | :"m"(v->counter), "0"(i)); |
| 380 | return i + __i; |
| 381 | } |
| 382 | |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 383 | static __inline__ long atomic64_sub_return(long i, atomic64_t *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 385 | return atomic64_add_return(-i,v); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
Hugh Dickins | 7c72aaf | 2005-11-23 13:37:40 -0800 | [diff] [blame] | 388 | #define atomic64_inc_return(v) (atomic64_add_return(1,v)) |
| 389 | #define atomic64_dec_return(v) (atomic64_sub_return(1,v)) |
| 390 | |
Nick Piggin | 4a6dae6 | 2005-11-13 16:07:24 -0800 | [diff] [blame] | 391 | #define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new)) |
Ingo Molnar | ffbf670 | 2006-01-09 15:59:17 -0800 | [diff] [blame] | 392 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) |
Nick Piggin | 4a6dae6 | 2005-11-13 16:07:24 -0800 | [diff] [blame] | 393 | |
Nick Piggin | 8426e1f | 2005-11-13 16:07:25 -0800 | [diff] [blame] | 394 | /** |
| 395 | * atomic_add_unless - add unless the number is a given value |
| 396 | * @v: pointer of type atomic_t |
| 397 | * @a: the amount to add to v... |
| 398 | * @u: ...unless v is equal to u. |
| 399 | * |
| 400 | * Atomically adds @a to @v, so long as it was not @u. |
| 401 | * Returns non-zero if @v was not @u, and zero otherwise. |
| 402 | */ |
| 403 | #define atomic_add_unless(v, a, u) \ |
| 404 | ({ \ |
| 405 | int c, old; \ |
| 406 | c = atomic_read(v); \ |
Nick Piggin | 0b2fcfd | 2006-03-23 03:01:02 -0800 | [diff] [blame] | 407 | for (;;) { \ |
| 408 | if (unlikely(c == (u))) \ |
| 409 | break; \ |
| 410 | old = atomic_cmpxchg((v), c, c + (a)); \ |
| 411 | if (likely(old == c)) \ |
| 412 | break; \ |
Nick Piggin | 8426e1f | 2005-11-13 16:07:25 -0800 | [diff] [blame] | 413 | c = old; \ |
Nick Piggin | 0b2fcfd | 2006-03-23 03:01:02 -0800 | [diff] [blame] | 414 | } \ |
Nick Piggin | 8426e1f | 2005-11-13 16:07:25 -0800 | [diff] [blame] | 415 | c != (u); \ |
| 416 | }) |
| 417 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) |
| 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | /* These are x86-specific, used by some header files */ |
| 420 | #define atomic_clear_mask(mask, addr) \ |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 421 | __asm__ __volatile__(LOCK_PREFIX "andl %0,%1" \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | : : "r" (~(mask)),"m" (*addr) : "memory") |
| 423 | |
| 424 | #define atomic_set_mask(mask, addr) \ |
Gerd Hoffmann | d167a51 | 2006-06-26 13:56:16 +0200 | [diff] [blame] | 425 | __asm__ __volatile__(LOCK_PREFIX "orl %0,%1" \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | : : "r" ((unsigned)mask),"m" (*(addr)) : "memory") |
| 427 | |
| 428 | /* Atomic operations are already serializing on x86 */ |
| 429 | #define smp_mb__before_atomic_dec() barrier() |
| 430 | #define smp_mb__after_atomic_dec() barrier() |
| 431 | #define smp_mb__before_atomic_inc() barrier() |
| 432 | #define smp_mb__after_atomic_inc() barrier() |
| 433 | |
Christoph Lameter | d3cb487 | 2006-01-06 00:11:20 -0800 | [diff] [blame] | 434 | #include <asm-generic/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | #endif |