1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Atomic operations usable in machine independent code */
3 #ifndef _LINUX_ATOMIC_H
4 #define _LINUX_ATOMIC_H
5 #include <asm/atomic.h>
6 #include <asm/barrier.h>
9 * Relaxed variants of xchg, cmpxchg and some atomic operations.
11 * We support four variants:
13 * - Fully ordered: The default implementation, no suffix required.
14 * - Acquire: Provides ACQUIRE semantics, _acquire suffix.
15 * - Release: Provides RELEASE semantics, _release suffix.
16 * - Relaxed: No ordering guarantees, _relaxed suffix.
18 * For compound atomics performing both a load and a store, ACQUIRE
19 * semantics apply only to the load and RELEASE semantics only to the
20 * store portion of the operation. Note that a failed cmpxchg_acquire
21 * does -not- imply any memory ordering constraints.
23 * See Documentation/memory-barriers.txt for ACQUIRE/RELEASE definitions.
26 #ifndef atomic_read_acquire
27 #define atomic_read_acquire(v) smp_load_acquire(&(v)->counter)
30 #ifndef atomic_set_release
31 #define atomic_set_release(v, i) smp_store_release(&(v)->counter, (i))
35 * The idea here is to build acquire/release variants by adding explicit
36 * barriers on top of the relaxed variant. In the case where the relaxed
37 * variant is already fully ordered, no additional barriers are needed.
39 * Besides, if an arch has a special barrier for acquire/release, it could
40 * implement its own __atomic_op_* and use the same framework for building
43 * If an architecture overrides __atomic_op_acquire() it will probably want
44 * to define smp_mb__after_spinlock().
46 #ifndef __atomic_op_acquire
47 #define __atomic_op_acquire(op, args...) \
49 typeof(op##_relaxed(args)) __ret = op##_relaxed(args); \
50 smp_mb__after_atomic(); \
55 #ifndef __atomic_op_release
56 #define __atomic_op_release(op, args...) \
58 smp_mb__before_atomic(); \
63 #ifndef __atomic_op_fence
64 #define __atomic_op_fence(op, args...) \
66 typeof(op##_relaxed(args)) __ret; \
67 smp_mb__before_atomic(); \
68 __ret = op##_relaxed(args); \
69 smp_mb__after_atomic(); \
74 /* atomic_add_return_relaxed */
75 #ifndef atomic_add_return_relaxed
76 #define atomic_add_return_relaxed atomic_add_return
77 #define atomic_add_return_acquire atomic_add_return
78 #define atomic_add_return_release atomic_add_return
80 #else /* atomic_add_return_relaxed */
82 #ifndef atomic_add_return_acquire
83 #define atomic_add_return_acquire(...) \
84 __atomic_op_acquire(atomic_add_return, __VA_ARGS__)
87 #ifndef atomic_add_return_release
88 #define atomic_add_return_release(...) \
89 __atomic_op_release(atomic_add_return, __VA_ARGS__)
92 #ifndef atomic_add_return
93 #define atomic_add_return(...) \
94 __atomic_op_fence(atomic_add_return, __VA_ARGS__)
96 #endif /* atomic_add_return_relaxed */
98 /* atomic_inc_return_relaxed */
99 #ifndef atomic_inc_return_relaxed
100 #define atomic_inc_return_relaxed atomic_inc_return
101 #define atomic_inc_return_acquire atomic_inc_return
102 #define atomic_inc_return_release atomic_inc_return
104 #else /* atomic_inc_return_relaxed */
106 #ifndef atomic_inc_return_acquire
107 #define atomic_inc_return_acquire(...) \
108 __atomic_op_acquire(atomic_inc_return, __VA_ARGS__)
111 #ifndef atomic_inc_return_release
112 #define atomic_inc_return_release(...) \
113 __atomic_op_release(atomic_inc_return, __VA_ARGS__)
116 #ifndef atomic_inc_return
117 #define atomic_inc_return(...) \
118 __atomic_op_fence(atomic_inc_return, __VA_ARGS__)
120 #endif /* atomic_inc_return_relaxed */
122 /* atomic_sub_return_relaxed */
123 #ifndef atomic_sub_return_relaxed
124 #define atomic_sub_return_relaxed atomic_sub_return
125 #define atomic_sub_return_acquire atomic_sub_return
126 #define atomic_sub_return_release atomic_sub_return
128 #else /* atomic_sub_return_relaxed */
130 #ifndef atomic_sub_return_acquire
131 #define atomic_sub_return_acquire(...) \
132 __atomic_op_acquire(atomic_sub_return, __VA_ARGS__)
135 #ifndef atomic_sub_return_release
136 #define atomic_sub_return_release(...) \
137 __atomic_op_release(atomic_sub_return, __VA_ARGS__)
140 #ifndef atomic_sub_return
141 #define atomic_sub_return(...) \
142 __atomic_op_fence(atomic_sub_return, __VA_ARGS__)
144 #endif /* atomic_sub_return_relaxed */
146 /* atomic_dec_return_relaxed */
147 #ifndef atomic_dec_return_relaxed
148 #define atomic_dec_return_relaxed atomic_dec_return
149 #define atomic_dec_return_acquire atomic_dec_return
150 #define atomic_dec_return_release atomic_dec_return
152 #else /* atomic_dec_return_relaxed */
154 #ifndef atomic_dec_return_acquire
155 #define atomic_dec_return_acquire(...) \
156 __atomic_op_acquire(atomic_dec_return, __VA_ARGS__)
159 #ifndef atomic_dec_return_release
160 #define atomic_dec_return_release(...) \
161 __atomic_op_release(atomic_dec_return, __VA_ARGS__)
164 #ifndef atomic_dec_return
165 #define atomic_dec_return(...) \
166 __atomic_op_fence(atomic_dec_return, __VA_ARGS__)
168 #endif /* atomic_dec_return_relaxed */
171 /* atomic_fetch_add_relaxed */
172 #ifndef atomic_fetch_add_relaxed
173 #define atomic_fetch_add_relaxed atomic_fetch_add
174 #define atomic_fetch_add_acquire atomic_fetch_add
175 #define atomic_fetch_add_release atomic_fetch_add
177 #else /* atomic_fetch_add_relaxed */
179 #ifndef atomic_fetch_add_acquire
180 #define atomic_fetch_add_acquire(...) \
181 __atomic_op_acquire(atomic_fetch_add, __VA_ARGS__)
184 #ifndef atomic_fetch_add_release
185 #define atomic_fetch_add_release(...) \
186 __atomic_op_release(atomic_fetch_add, __VA_ARGS__)
189 #ifndef atomic_fetch_add
190 #define atomic_fetch_add(...) \
191 __atomic_op_fence(atomic_fetch_add, __VA_ARGS__)
193 #endif /* atomic_fetch_add_relaxed */
195 /* atomic_fetch_inc_relaxed */
196 #ifndef atomic_fetch_inc_relaxed
198 #ifndef atomic_fetch_inc
199 #define atomic_fetch_inc(v) atomic_fetch_add(1, (v))
200 #define atomic_fetch_inc_relaxed(v) atomic_fetch_add_relaxed(1, (v))
201 #define atomic_fetch_inc_acquire(v) atomic_fetch_add_acquire(1, (v))
202 #define atomic_fetch_inc_release(v) atomic_fetch_add_release(1, (v))
203 #else /* atomic_fetch_inc */
204 #define atomic_fetch_inc_relaxed atomic_fetch_inc
205 #define atomic_fetch_inc_acquire atomic_fetch_inc
206 #define atomic_fetch_inc_release atomic_fetch_inc
207 #endif /* atomic_fetch_inc */
209 #else /* atomic_fetch_inc_relaxed */
211 #ifndef atomic_fetch_inc_acquire
212 #define atomic_fetch_inc_acquire(...) \
213 __atomic_op_acquire(atomic_fetch_inc, __VA_ARGS__)
216 #ifndef atomic_fetch_inc_release
217 #define atomic_fetch_inc_release(...) \
218 __atomic_op_release(atomic_fetch_inc, __VA_ARGS__)
221 #ifndef atomic_fetch_inc
222 #define atomic_fetch_inc(...) \
223 __atomic_op_fence(atomic_fetch_inc, __VA_ARGS__)
225 #endif /* atomic_fetch_inc_relaxed */
227 /* atomic_fetch_sub_relaxed */
228 #ifndef atomic_fetch_sub_relaxed
229 #define atomic_fetch_sub_relaxed atomic_fetch_sub
230 #define atomic_fetch_sub_acquire atomic_fetch_sub
231 #define atomic_fetch_sub_release atomic_fetch_sub
233 #else /* atomic_fetch_sub_relaxed */
235 #ifndef atomic_fetch_sub_acquire
236 #define atomic_fetch_sub_acquire(...) \
237 __atomic_op_acquire(atomic_fetch_sub, __VA_ARGS__)
240 #ifndef atomic_fetch_sub_release
241 #define atomic_fetch_sub_release(...) \
242 __atomic_op_release(atomic_fetch_sub, __VA_ARGS__)
245 #ifndef atomic_fetch_sub
246 #define atomic_fetch_sub(...) \
247 __atomic_op_fence(atomic_fetch_sub, __VA_ARGS__)
249 #endif /* atomic_fetch_sub_relaxed */
251 /* atomic_fetch_dec_relaxed */
252 #ifndef atomic_fetch_dec_relaxed
254 #ifndef atomic_fetch_dec
255 #define atomic_fetch_dec(v) atomic_fetch_sub(1, (v))
256 #define atomic_fetch_dec_relaxed(v) atomic_fetch_sub_relaxed(1, (v))
257 #define atomic_fetch_dec_acquire(v) atomic_fetch_sub_acquire(1, (v))
258 #define atomic_fetch_dec_release(v) atomic_fetch_sub_release(1, (v))
259 #else /* atomic_fetch_dec */
260 #define atomic_fetch_dec_relaxed atomic_fetch_dec
261 #define atomic_fetch_dec_acquire atomic_fetch_dec
262 #define atomic_fetch_dec_release atomic_fetch_dec
263 #endif /* atomic_fetch_dec */
265 #else /* atomic_fetch_dec_relaxed */
267 #ifndef atomic_fetch_dec_acquire
268 #define atomic_fetch_dec_acquire(...) \
269 __atomic_op_acquire(atomic_fetch_dec, __VA_ARGS__)
272 #ifndef atomic_fetch_dec_release
273 #define atomic_fetch_dec_release(...) \
274 __atomic_op_release(atomic_fetch_dec, __VA_ARGS__)
277 #ifndef atomic_fetch_dec
278 #define atomic_fetch_dec(...) \
279 __atomic_op_fence(atomic_fetch_dec, __VA_ARGS__)
281 #endif /* atomic_fetch_dec_relaxed */
283 /* atomic_fetch_or_relaxed */
284 #ifndef atomic_fetch_or_relaxed
285 #define atomic_fetch_or_relaxed atomic_fetch_or
286 #define atomic_fetch_or_acquire atomic_fetch_or
287 #define atomic_fetch_or_release atomic_fetch_or
289 #else /* atomic_fetch_or_relaxed */
291 #ifndef atomic_fetch_or_acquire
292 #define atomic_fetch_or_acquire(...) \
293 __atomic_op_acquire(atomic_fetch_or, __VA_ARGS__)
296 #ifndef atomic_fetch_or_release
297 #define atomic_fetch_or_release(...) \
298 __atomic_op_release(atomic_fetch_or, __VA_ARGS__)
301 #ifndef atomic_fetch_or
302 #define atomic_fetch_or(...) \
303 __atomic_op_fence(atomic_fetch_or, __VA_ARGS__)
305 #endif /* atomic_fetch_or_relaxed */
307 /* atomic_fetch_and_relaxed */
308 #ifndef atomic_fetch_and_relaxed
309 #define atomic_fetch_and_relaxed atomic_fetch_and
310 #define atomic_fetch_and_acquire atomic_fetch_and
311 #define atomic_fetch_and_release atomic_fetch_and
313 #else /* atomic_fetch_and_relaxed */
315 #ifndef atomic_fetch_and_acquire
316 #define atomic_fetch_and_acquire(...) \
317 __atomic_op_acquire(atomic_fetch_and, __VA_ARGS__)
320 #ifndef atomic_fetch_and_release
321 #define atomic_fetch_and_release(...) \
322 __atomic_op_release(atomic_fetch_and, __VA_ARGS__)
325 #ifndef atomic_fetch_and
326 #define atomic_fetch_and(...) \
327 __atomic_op_fence(atomic_fetch_and, __VA_ARGS__)
329 #endif /* atomic_fetch_and_relaxed */
332 /* atomic_fetch_andnot_relaxed */
333 #ifndef atomic_fetch_andnot_relaxed
334 #define atomic_fetch_andnot_relaxed atomic_fetch_andnot
335 #define atomic_fetch_andnot_acquire atomic_fetch_andnot
336 #define atomic_fetch_andnot_release atomic_fetch_andnot
338 #else /* atomic_fetch_andnot_relaxed */
340 #ifndef atomic_fetch_andnot_acquire
341 #define atomic_fetch_andnot_acquire(...) \
342 __atomic_op_acquire(atomic_fetch_andnot, __VA_ARGS__)
345 #ifndef atomic_fetch_andnot_release
346 #define atomic_fetch_andnot_release(...) \
347 __atomic_op_release(atomic_fetch_andnot, __VA_ARGS__)
350 #ifndef atomic_fetch_andnot
351 #define atomic_fetch_andnot(...) \
352 __atomic_op_fence(atomic_fetch_andnot, __VA_ARGS__)
354 #endif /* atomic_fetch_andnot_relaxed */
355 #endif /* atomic_andnot */
357 /* atomic_fetch_xor_relaxed */
358 #ifndef atomic_fetch_xor_relaxed
359 #define atomic_fetch_xor_relaxed atomic_fetch_xor
360 #define atomic_fetch_xor_acquire atomic_fetch_xor
361 #define atomic_fetch_xor_release atomic_fetch_xor
363 #else /* atomic_fetch_xor_relaxed */
365 #ifndef atomic_fetch_xor_acquire
366 #define atomic_fetch_xor_acquire(...) \
367 __atomic_op_acquire(atomic_fetch_xor, __VA_ARGS__)
370 #ifndef atomic_fetch_xor_release
371 #define atomic_fetch_xor_release(...) \
372 __atomic_op_release(atomic_fetch_xor, __VA_ARGS__)
375 #ifndef atomic_fetch_xor
376 #define atomic_fetch_xor(...) \
377 __atomic_op_fence(atomic_fetch_xor, __VA_ARGS__)
379 #endif /* atomic_fetch_xor_relaxed */
382 /* atomic_xchg_relaxed */
383 #ifndef atomic_xchg_relaxed
384 #define atomic_xchg_relaxed atomic_xchg
385 #define atomic_xchg_acquire atomic_xchg
386 #define atomic_xchg_release atomic_xchg
388 #else /* atomic_xchg_relaxed */
390 #ifndef atomic_xchg_acquire
391 #define atomic_xchg_acquire(...) \
392 __atomic_op_acquire(atomic_xchg, __VA_ARGS__)
395 #ifndef atomic_xchg_release
396 #define atomic_xchg_release(...) \
397 __atomic_op_release(atomic_xchg, __VA_ARGS__)
401 #define atomic_xchg(...) \
402 __atomic_op_fence(atomic_xchg, __VA_ARGS__)
404 #endif /* atomic_xchg_relaxed */
406 /* atomic_cmpxchg_relaxed */
407 #ifndef atomic_cmpxchg_relaxed
408 #define atomic_cmpxchg_relaxed atomic_cmpxchg
409 #define atomic_cmpxchg_acquire atomic_cmpxchg
410 #define atomic_cmpxchg_release atomic_cmpxchg
412 #else /* atomic_cmpxchg_relaxed */
414 #ifndef atomic_cmpxchg_acquire
415 #define atomic_cmpxchg_acquire(...) \
416 __atomic_op_acquire(atomic_cmpxchg, __VA_ARGS__)
419 #ifndef atomic_cmpxchg_release
420 #define atomic_cmpxchg_release(...) \
421 __atomic_op_release(atomic_cmpxchg, __VA_ARGS__)
424 #ifndef atomic_cmpxchg
425 #define atomic_cmpxchg(...) \
426 __atomic_op_fence(atomic_cmpxchg, __VA_ARGS__)
428 #endif /* atomic_cmpxchg_relaxed */
430 #ifndef atomic_try_cmpxchg
432 #define __atomic_try_cmpxchg(type, _p, _po, _n) \
434 typeof(_po) __po = (_po); \
435 typeof(*(_po)) __r, __o = *__po; \
436 __r = atomic_cmpxchg##type((_p), __o, (_n)); \
437 if (unlikely(__r != __o)) \
439 likely(__r == __o); \
442 #define atomic_try_cmpxchg(_p, _po, _n) __atomic_try_cmpxchg(, _p, _po, _n)
443 #define atomic_try_cmpxchg_relaxed(_p, _po, _n) __atomic_try_cmpxchg(_relaxed, _p, _po, _n)
444 #define atomic_try_cmpxchg_acquire(_p, _po, _n) __atomic_try_cmpxchg(_acquire, _p, _po, _n)
445 #define atomic_try_cmpxchg_release(_p, _po, _n) __atomic_try_cmpxchg(_release, _p, _po, _n)
447 #else /* atomic_try_cmpxchg */
448 #define atomic_try_cmpxchg_relaxed atomic_try_cmpxchg
449 #define atomic_try_cmpxchg_acquire atomic_try_cmpxchg
450 #define atomic_try_cmpxchg_release atomic_try_cmpxchg
451 #endif /* atomic_try_cmpxchg */
453 /* cmpxchg_relaxed */
454 #ifndef cmpxchg_relaxed
455 #define cmpxchg_relaxed cmpxchg
456 #define cmpxchg_acquire cmpxchg
457 #define cmpxchg_release cmpxchg
459 #else /* cmpxchg_relaxed */
461 #ifndef cmpxchg_acquire
462 #define cmpxchg_acquire(...) \
463 __atomic_op_acquire(cmpxchg, __VA_ARGS__)
466 #ifndef cmpxchg_release
467 #define cmpxchg_release(...) \
468 __atomic_op_release(cmpxchg, __VA_ARGS__)
472 #define cmpxchg(...) \
473 __atomic_op_fence(cmpxchg, __VA_ARGS__)
475 #endif /* cmpxchg_relaxed */
477 /* cmpxchg64_relaxed */
478 #ifndef cmpxchg64_relaxed
479 #define cmpxchg64_relaxed cmpxchg64
480 #define cmpxchg64_acquire cmpxchg64
481 #define cmpxchg64_release cmpxchg64
483 #else /* cmpxchg64_relaxed */
485 #ifndef cmpxchg64_acquire
486 #define cmpxchg64_acquire(...) \
487 __atomic_op_acquire(cmpxchg64, __VA_ARGS__)
490 #ifndef cmpxchg64_release
491 #define cmpxchg64_release(...) \
492 __atomic_op_release(cmpxchg64, __VA_ARGS__)
496 #define cmpxchg64(...) \
497 __atomic_op_fence(cmpxchg64, __VA_ARGS__)
499 #endif /* cmpxchg64_relaxed */
503 #define xchg_relaxed xchg
504 #define xchg_acquire xchg
505 #define xchg_release xchg
507 #else /* xchg_relaxed */
510 #define xchg_acquire(...) __atomic_op_acquire(xchg, __VA_ARGS__)
514 #define xchg_release(...) __atomic_op_release(xchg, __VA_ARGS__)
518 #define xchg(...) __atomic_op_fence(xchg, __VA_ARGS__)
520 #endif /* xchg_relaxed */
523 * atomic_add_unless - add unless the number is already a given value
524 * @v: pointer of type atomic_t
525 * @a: the amount to add to v...
526 * @u: ...unless v is equal to u.
528 * Atomically adds @a to @v, so long as @v was not already @u.
529 * Returns non-zero if @v was not @u, and zero otherwise.
531 static inline int atomic_add_unless(atomic_t *v, int a, int u)
533 return __atomic_add_unless(v, a, u) != u;
537 * atomic_inc_not_zero - increment unless the number is zero
538 * @v: pointer of type atomic_t
540 * Atomically increments @v by 1, so long as @v is non-zero.
541 * Returns non-zero if @v was non-zero, and zero otherwise.
543 #ifndef atomic_inc_not_zero
544 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
547 #ifndef atomic_andnot
548 static inline void atomic_andnot(int i, atomic_t *v)
553 static inline int atomic_fetch_andnot(int i, atomic_t *v)
555 return atomic_fetch_and(~i, v);
558 static inline int atomic_fetch_andnot_relaxed(int i, atomic_t *v)
560 return atomic_fetch_and_relaxed(~i, v);
563 static inline int atomic_fetch_andnot_acquire(int i, atomic_t *v)
565 return atomic_fetch_and_acquire(~i, v);
568 static inline int atomic_fetch_andnot_release(int i, atomic_t *v)
570 return atomic_fetch_and_release(~i, v);
575 * atomic_inc_not_zero_hint - increment if not null
576 * @v: pointer of type atomic_t
577 * @hint: probable value of the atomic before the increment
579 * This version of atomic_inc_not_zero() gives a hint of probable
580 * value of the atomic. This helps processor to not read the memory
581 * before doing the atomic read/modify/write cycle, lowering
582 * number of bus transactions on some arches.
584 * Returns: 0 if increment was not done, 1 otherwise.
586 #ifndef atomic_inc_not_zero_hint
587 static inline int atomic_inc_not_zero_hint(atomic_t *v, int hint)
591 /* sanity test, should be removed by compiler if hint is a constant */
593 return atomic_inc_not_zero(v);
596 val = atomic_cmpxchg(v, c, c + 1);
606 #ifndef atomic_inc_unless_negative
607 static inline int atomic_inc_unless_negative(atomic_t *p)
610 for (v = 0; v >= 0; v = v1) {
611 v1 = atomic_cmpxchg(p, v, v + 1);
619 #ifndef atomic_dec_unless_positive
620 static inline int atomic_dec_unless_positive(atomic_t *p)
623 for (v = 0; v <= 0; v = v1) {
624 v1 = atomic_cmpxchg(p, v, v - 1);
633 * atomic_dec_if_positive - decrement by 1 if old value positive
634 * @v: pointer of type atomic_t
636 * The function returns the old value of *v minus 1, even if
637 * the atomic variable, v, was not decremented.
639 #ifndef atomic_dec_if_positive
640 static inline int atomic_dec_if_positive(atomic_t *v)
646 if (unlikely(dec < 0))
648 old = atomic_cmpxchg((v), c, dec);
649 if (likely(old == c))
657 #define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
659 #ifdef CONFIG_GENERIC_ATOMIC64
660 #include <asm-generic/atomic64.h>
663 #ifndef atomic64_read_acquire
664 #define atomic64_read_acquire(v) smp_load_acquire(&(v)->counter)
667 #ifndef atomic64_set_release
668 #define atomic64_set_release(v, i) smp_store_release(&(v)->counter, (i))
671 /* atomic64_add_return_relaxed */
672 #ifndef atomic64_add_return_relaxed
673 #define atomic64_add_return_relaxed atomic64_add_return
674 #define atomic64_add_return_acquire atomic64_add_return
675 #define atomic64_add_return_release atomic64_add_return
677 #else /* atomic64_add_return_relaxed */
679 #ifndef atomic64_add_return_acquire
680 #define atomic64_add_return_acquire(...) \
681 __atomic_op_acquire(atomic64_add_return, __VA_ARGS__)
684 #ifndef atomic64_add_return_release
685 #define atomic64_add_return_release(...) \
686 __atomic_op_release(atomic64_add_return, __VA_ARGS__)
689 #ifndef atomic64_add_return
690 #define atomic64_add_return(...) \
691 __atomic_op_fence(atomic64_add_return, __VA_ARGS__)
693 #endif /* atomic64_add_return_relaxed */
695 /* atomic64_inc_return_relaxed */
696 #ifndef atomic64_inc_return_relaxed
697 #define atomic64_inc_return_relaxed atomic64_inc_return
698 #define atomic64_inc_return_acquire atomic64_inc_return
699 #define atomic64_inc_return_release atomic64_inc_return
701 #else /* atomic64_inc_return_relaxed */
703 #ifndef atomic64_inc_return_acquire
704 #define atomic64_inc_return_acquire(...) \
705 __atomic_op_acquire(atomic64_inc_return, __VA_ARGS__)
708 #ifndef atomic64_inc_return_release
709 #define atomic64_inc_return_release(...) \
710 __atomic_op_release(atomic64_inc_return, __VA_ARGS__)
713 #ifndef atomic64_inc_return
714 #define atomic64_inc_return(...) \
715 __atomic_op_fence(atomic64_inc_return, __VA_ARGS__)
717 #endif /* atomic64_inc_return_relaxed */
720 /* atomic64_sub_return_relaxed */
721 #ifndef atomic64_sub_return_relaxed
722 #define atomic64_sub_return_relaxed atomic64_sub_return
723 #define atomic64_sub_return_acquire atomic64_sub_return
724 #define atomic64_sub_return_release atomic64_sub_return
726 #else /* atomic64_sub_return_relaxed */
728 #ifndef atomic64_sub_return_acquire
729 #define atomic64_sub_return_acquire(...) \
730 __atomic_op_acquire(atomic64_sub_return, __VA_ARGS__)
733 #ifndef atomic64_sub_return_release
734 #define atomic64_sub_return_release(...) \
735 __atomic_op_release(atomic64_sub_return, __VA_ARGS__)
738 #ifndef atomic64_sub_return
739 #define atomic64_sub_return(...) \
740 __atomic_op_fence(atomic64_sub_return, __VA_ARGS__)
742 #endif /* atomic64_sub_return_relaxed */
744 /* atomic64_dec_return_relaxed */
745 #ifndef atomic64_dec_return_relaxed
746 #define atomic64_dec_return_relaxed atomic64_dec_return
747 #define atomic64_dec_return_acquire atomic64_dec_return
748 #define atomic64_dec_return_release atomic64_dec_return
750 #else /* atomic64_dec_return_relaxed */
752 #ifndef atomic64_dec_return_acquire
753 #define atomic64_dec_return_acquire(...) \
754 __atomic_op_acquire(atomic64_dec_return, __VA_ARGS__)
757 #ifndef atomic64_dec_return_release
758 #define atomic64_dec_return_release(...) \
759 __atomic_op_release(atomic64_dec_return, __VA_ARGS__)
762 #ifndef atomic64_dec_return
763 #define atomic64_dec_return(...) \
764 __atomic_op_fence(atomic64_dec_return, __VA_ARGS__)
766 #endif /* atomic64_dec_return_relaxed */
769 /* atomic64_fetch_add_relaxed */
770 #ifndef atomic64_fetch_add_relaxed
771 #define atomic64_fetch_add_relaxed atomic64_fetch_add
772 #define atomic64_fetch_add_acquire atomic64_fetch_add
773 #define atomic64_fetch_add_release atomic64_fetch_add
775 #else /* atomic64_fetch_add_relaxed */
777 #ifndef atomic64_fetch_add_acquire
778 #define atomic64_fetch_add_acquire(...) \
779 __atomic_op_acquire(atomic64_fetch_add, __VA_ARGS__)
782 #ifndef atomic64_fetch_add_release
783 #define atomic64_fetch_add_release(...) \
784 __atomic_op_release(atomic64_fetch_add, __VA_ARGS__)
787 #ifndef atomic64_fetch_add
788 #define atomic64_fetch_add(...) \
789 __atomic_op_fence(atomic64_fetch_add, __VA_ARGS__)
791 #endif /* atomic64_fetch_add_relaxed */
793 /* atomic64_fetch_inc_relaxed */
794 #ifndef atomic64_fetch_inc_relaxed
796 #ifndef atomic64_fetch_inc
797 #define atomic64_fetch_inc(v) atomic64_fetch_add(1, (v))
798 #define atomic64_fetch_inc_relaxed(v) atomic64_fetch_add_relaxed(1, (v))
799 #define atomic64_fetch_inc_acquire(v) atomic64_fetch_add_acquire(1, (v))
800 #define atomic64_fetch_inc_release(v) atomic64_fetch_add_release(1, (v))
801 #else /* atomic64_fetch_inc */
802 #define atomic64_fetch_inc_relaxed atomic64_fetch_inc
803 #define atomic64_fetch_inc_acquire atomic64_fetch_inc
804 #define atomic64_fetch_inc_release atomic64_fetch_inc
805 #endif /* atomic64_fetch_inc */
807 #else /* atomic64_fetch_inc_relaxed */
809 #ifndef atomic64_fetch_inc_acquire
810 #define atomic64_fetch_inc_acquire(...) \
811 __atomic_op_acquire(atomic64_fetch_inc, __VA_ARGS__)
814 #ifndef atomic64_fetch_inc_release
815 #define atomic64_fetch_inc_release(...) \
816 __atomic_op_release(atomic64_fetch_inc, __VA_ARGS__)
819 #ifndef atomic64_fetch_inc
820 #define atomic64_fetch_inc(...) \
821 __atomic_op_fence(atomic64_fetch_inc, __VA_ARGS__)
823 #endif /* atomic64_fetch_inc_relaxed */
825 /* atomic64_fetch_sub_relaxed */
826 #ifndef atomic64_fetch_sub_relaxed
827 #define atomic64_fetch_sub_relaxed atomic64_fetch_sub
828 #define atomic64_fetch_sub_acquire atomic64_fetch_sub
829 #define atomic64_fetch_sub_release atomic64_fetch_sub
831 #else /* atomic64_fetch_sub_relaxed */
833 #ifndef atomic64_fetch_sub_acquire
834 #define atomic64_fetch_sub_acquire(...) \
835 __atomic_op_acquire(atomic64_fetch_sub, __VA_ARGS__)
838 #ifndef atomic64_fetch_sub_release
839 #define atomic64_fetch_sub_release(...) \
840 __atomic_op_release(atomic64_fetch_sub, __VA_ARGS__)
843 #ifndef atomic64_fetch_sub
844 #define atomic64_fetch_sub(...) \
845 __atomic_op_fence(atomic64_fetch_sub, __VA_ARGS__)
847 #endif /* atomic64_fetch_sub_relaxed */
849 /* atomic64_fetch_dec_relaxed */
850 #ifndef atomic64_fetch_dec_relaxed
852 #ifndef atomic64_fetch_dec
853 #define atomic64_fetch_dec(v) atomic64_fetch_sub(1, (v))
854 #define atomic64_fetch_dec_relaxed(v) atomic64_fetch_sub_relaxed(1, (v))
855 #define atomic64_fetch_dec_acquire(v) atomic64_fetch_sub_acquire(1, (v))
856 #define atomic64_fetch_dec_release(v) atomic64_fetch_sub_release(1, (v))
857 #else /* atomic64_fetch_dec */
858 #define atomic64_fetch_dec_relaxed atomic64_fetch_dec
859 #define atomic64_fetch_dec_acquire atomic64_fetch_dec
860 #define atomic64_fetch_dec_release atomic64_fetch_dec
861 #endif /* atomic64_fetch_dec */
863 #else /* atomic64_fetch_dec_relaxed */
865 #ifndef atomic64_fetch_dec_acquire
866 #define atomic64_fetch_dec_acquire(...) \
867 __atomic_op_acquire(atomic64_fetch_dec, __VA_ARGS__)
870 #ifndef atomic64_fetch_dec_release
871 #define atomic64_fetch_dec_release(...) \
872 __atomic_op_release(atomic64_fetch_dec, __VA_ARGS__)
875 #ifndef atomic64_fetch_dec
876 #define atomic64_fetch_dec(...) \
877 __atomic_op_fence(atomic64_fetch_dec, __VA_ARGS__)
879 #endif /* atomic64_fetch_dec_relaxed */
881 /* atomic64_fetch_or_relaxed */
882 #ifndef atomic64_fetch_or_relaxed
883 #define atomic64_fetch_or_relaxed atomic64_fetch_or
884 #define atomic64_fetch_or_acquire atomic64_fetch_or
885 #define atomic64_fetch_or_release atomic64_fetch_or
887 #else /* atomic64_fetch_or_relaxed */
889 #ifndef atomic64_fetch_or_acquire
890 #define atomic64_fetch_or_acquire(...) \
891 __atomic_op_acquire(atomic64_fetch_or, __VA_ARGS__)
894 #ifndef atomic64_fetch_or_release
895 #define atomic64_fetch_or_release(...) \
896 __atomic_op_release(atomic64_fetch_or, __VA_ARGS__)
899 #ifndef atomic64_fetch_or
900 #define atomic64_fetch_or(...) \
901 __atomic_op_fence(atomic64_fetch_or, __VA_ARGS__)
903 #endif /* atomic64_fetch_or_relaxed */
905 /* atomic64_fetch_and_relaxed */
906 #ifndef atomic64_fetch_and_relaxed
907 #define atomic64_fetch_and_relaxed atomic64_fetch_and
908 #define atomic64_fetch_and_acquire atomic64_fetch_and
909 #define atomic64_fetch_and_release atomic64_fetch_and
911 #else /* atomic64_fetch_and_relaxed */
913 #ifndef atomic64_fetch_and_acquire
914 #define atomic64_fetch_and_acquire(...) \
915 __atomic_op_acquire(atomic64_fetch_and, __VA_ARGS__)
918 #ifndef atomic64_fetch_and_release
919 #define atomic64_fetch_and_release(...) \
920 __atomic_op_release(atomic64_fetch_and, __VA_ARGS__)
923 #ifndef atomic64_fetch_and
924 #define atomic64_fetch_and(...) \
925 __atomic_op_fence(atomic64_fetch_and, __VA_ARGS__)
927 #endif /* atomic64_fetch_and_relaxed */
929 #ifdef atomic64_andnot
930 /* atomic64_fetch_andnot_relaxed */
931 #ifndef atomic64_fetch_andnot_relaxed
932 #define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot
933 #define atomic64_fetch_andnot_acquire atomic64_fetch_andnot
934 #define atomic64_fetch_andnot_release atomic64_fetch_andnot
936 #else /* atomic64_fetch_andnot_relaxed */
938 #ifndef atomic64_fetch_andnot_acquire
939 #define atomic64_fetch_andnot_acquire(...) \
940 __atomic_op_acquire(atomic64_fetch_andnot, __VA_ARGS__)
943 #ifndef atomic64_fetch_andnot_release
944 #define atomic64_fetch_andnot_release(...) \
945 __atomic_op_release(atomic64_fetch_andnot, __VA_ARGS__)
948 #ifndef atomic64_fetch_andnot
949 #define atomic64_fetch_andnot(...) \
950 __atomic_op_fence(atomic64_fetch_andnot, __VA_ARGS__)
952 #endif /* atomic64_fetch_andnot_relaxed */
953 #endif /* atomic64_andnot */
955 /* atomic64_fetch_xor_relaxed */
956 #ifndef atomic64_fetch_xor_relaxed
957 #define atomic64_fetch_xor_relaxed atomic64_fetch_xor
958 #define atomic64_fetch_xor_acquire atomic64_fetch_xor
959 #define atomic64_fetch_xor_release atomic64_fetch_xor
961 #else /* atomic64_fetch_xor_relaxed */
963 #ifndef atomic64_fetch_xor_acquire
964 #define atomic64_fetch_xor_acquire(...) \
965 __atomic_op_acquire(atomic64_fetch_xor, __VA_ARGS__)
968 #ifndef atomic64_fetch_xor_release
969 #define atomic64_fetch_xor_release(...) \
970 __atomic_op_release(atomic64_fetch_xor, __VA_ARGS__)
973 #ifndef atomic64_fetch_xor
974 #define atomic64_fetch_xor(...) \
975 __atomic_op_fence(atomic64_fetch_xor, __VA_ARGS__)
977 #endif /* atomic64_fetch_xor_relaxed */
980 /* atomic64_xchg_relaxed */
981 #ifndef atomic64_xchg_relaxed
982 #define atomic64_xchg_relaxed atomic64_xchg
983 #define atomic64_xchg_acquire atomic64_xchg
984 #define atomic64_xchg_release atomic64_xchg
986 #else /* atomic64_xchg_relaxed */
988 #ifndef atomic64_xchg_acquire
989 #define atomic64_xchg_acquire(...) \
990 __atomic_op_acquire(atomic64_xchg, __VA_ARGS__)
993 #ifndef atomic64_xchg_release
994 #define atomic64_xchg_release(...) \
995 __atomic_op_release(atomic64_xchg, __VA_ARGS__)
998 #ifndef atomic64_xchg
999 #define atomic64_xchg(...) \
1000 __atomic_op_fence(atomic64_xchg, __VA_ARGS__)
1002 #endif /* atomic64_xchg_relaxed */
1004 /* atomic64_cmpxchg_relaxed */
1005 #ifndef atomic64_cmpxchg_relaxed
1006 #define atomic64_cmpxchg_relaxed atomic64_cmpxchg
1007 #define atomic64_cmpxchg_acquire atomic64_cmpxchg
1008 #define atomic64_cmpxchg_release atomic64_cmpxchg
1010 #else /* atomic64_cmpxchg_relaxed */
1012 #ifndef atomic64_cmpxchg_acquire
1013 #define atomic64_cmpxchg_acquire(...) \
1014 __atomic_op_acquire(atomic64_cmpxchg, __VA_ARGS__)
1017 #ifndef atomic64_cmpxchg_release
1018 #define atomic64_cmpxchg_release(...) \
1019 __atomic_op_release(atomic64_cmpxchg, __VA_ARGS__)
1022 #ifndef atomic64_cmpxchg
1023 #define atomic64_cmpxchg(...) \
1024 __atomic_op_fence(atomic64_cmpxchg, __VA_ARGS__)
1026 #endif /* atomic64_cmpxchg_relaxed */
1028 #ifndef atomic64_try_cmpxchg
1030 #define __atomic64_try_cmpxchg(type, _p, _po, _n) \
1032 typeof(_po) __po = (_po); \
1033 typeof(*(_po)) __r, __o = *__po; \
1034 __r = atomic64_cmpxchg##type((_p), __o, (_n)); \
1035 if (unlikely(__r != __o)) \
1037 likely(__r == __o); \
1040 #define atomic64_try_cmpxchg(_p, _po, _n) __atomic64_try_cmpxchg(, _p, _po, _n)
1041 #define atomic64_try_cmpxchg_relaxed(_p, _po, _n) __atomic64_try_cmpxchg(_relaxed, _p, _po, _n)
1042 #define atomic64_try_cmpxchg_acquire(_p, _po, _n) __atomic64_try_cmpxchg(_acquire, _p, _po, _n)
1043 #define atomic64_try_cmpxchg_release(_p, _po, _n) __atomic64_try_cmpxchg(_release, _p, _po, _n)
1045 #else /* atomic64_try_cmpxchg */
1046 #define atomic64_try_cmpxchg_relaxed atomic64_try_cmpxchg
1047 #define atomic64_try_cmpxchg_acquire atomic64_try_cmpxchg
1048 #define atomic64_try_cmpxchg_release atomic64_try_cmpxchg
1049 #endif /* atomic64_try_cmpxchg */
1051 #ifndef atomic64_andnot
1052 static inline void atomic64_andnot(long long i, atomic64_t *v)
1054 atomic64_and(~i, v);
1057 static inline long long atomic64_fetch_andnot(long long i, atomic64_t *v)
1059 return atomic64_fetch_and(~i, v);
1062 static inline long long atomic64_fetch_andnot_relaxed(long long i, atomic64_t *v)
1064 return atomic64_fetch_and_relaxed(~i, v);
1067 static inline long long atomic64_fetch_andnot_acquire(long long i, atomic64_t *v)
1069 return atomic64_fetch_and_acquire(~i, v);
1072 static inline long long atomic64_fetch_andnot_release(long long i, atomic64_t *v)
1074 return atomic64_fetch_and_release(~i, v);
1078 #define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
1080 #include <asm-generic/atomic-long.h>
1082 #endif /* _LINUX_ATOMIC_H */