projects / mirror_ubuntu-kernels.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 5ba840f9 PG |
2 | #ifndef _ALPHA_CMPXCHG_H |
| 3 | #define _ALPHA_CMPXCHG_H | |
| 4 | ||
| 5 | /* | |
| 6 | * Atomic exchange routines. | |
| 7 | */ | |
| 8 | ||
| 9 | #define __ASM__MB | |
| 10 | #define ____xchg(type, args...) __xchg ## type ## _local(args) | |
| 11 | #define ____cmpxchg(type, args...) __cmpxchg ## type ## _local(args) | |
| 12 | #include <asm/xchg.h> | |
| 13 | ||
| 14 | #define xchg_local(ptr, x) \ | |
| 15 | ({ \ | |
| 16 | __typeof__(*(ptr)) _x_ = (x); \ | |
| 17 | (__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_, \ | |
| 18 | sizeof(*(ptr))); \ | |
| 19 | }) | |
| 20 | ||
| 21 | #define cmpxchg_local(ptr, o, n) \ | |
| 22 | ({ \ | |
| 23 | __typeof__(*(ptr)) _o_ = (o); \ | |
| 24 | __typeof__(*(ptr)) _n_ = (n); \ | |
| 25 | (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \ | |
| 26 | (unsigned long)_n_, \ | |
| 27 | sizeof(*(ptr))); \ | |
| 28 | }) | |
| 29 | ||
| 30 | #define cmpxchg64_local(ptr, o, n) \ | |
| 31 | ({ \ | |
| 32 | BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ | |
| 33 | cmpxchg_local((ptr), (o), (n)); \ | |
| 34 | }) | |
| 35 | ||
| 36 | #ifdef CONFIG_SMP | |
| 37 | #undef __ASM__MB | |
| 38 | #define __ASM__MB "\tmb\n" | |
| 39 | #endif | |
| 40 | #undef ____xchg | |
| 41 | #undef ____cmpxchg | |
| 42 | #define ____xchg(type, args...) __xchg ##type(args) | |
| 43 | #define ____cmpxchg(type, args...) __cmpxchg ##type(args) | |
| 44 | #include <asm/xchg.h> | |
| 45 | ||
| 46 | #define xchg(ptr, x) \ | |
| 47 | ({ \ | |
| 48 | __typeof__(*(ptr)) _x_ = (x); \ | |
| 49 | (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, \ | |
| 50 | sizeof(*(ptr))); \ | |
| 51 | }) | |
| 52 | ||
| 53 | #define cmpxchg(ptr, o, n) \ | |
| 54 | ({ \ | |
| 55 | __typeof__(*(ptr)) _o_ = (o); \ | |
| 56 | __typeof__(*(ptr)) _n_ = (n); \ | |
| 57 | (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ | |
| 58 | (unsigned long)_n_, sizeof(*(ptr)));\ | |
| 59 | }) | |
| 60 | ||
| 61 | #define cmpxchg64(ptr, o, n) \ | |
| 62 | ({ \ | |
| 63 | BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ | |
| 64 | cmpxchg((ptr), (o), (n)); \ | |
| 65 | }) | |
| 66 | ||
| 67 | #undef __ASM__MB | |
| 68 | #undef ____cmpxchg | |
| 69 | ||
| 5ba840f9 | 70 | #endif /* _ALPHA_CMPXCHG_H */ |