77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _ALPHA_CMPXCHG_H
|
||
|
|
#define _ALPHA_CMPXCHG_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Atomic exchange routines.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define ____xchg(type, args...) __xchg ## type ## _local(args)
|
||
|
|
#define ____cmpxchg(type, args...) __cmpxchg ## type ## _local(args)
|
||
|
|
#include <asm/xchg.h>
|
||
|
|
|
||
|
|
#define xchg_local(ptr, x) \
|
||
|
|
({ \
|
||
|
|
__typeof__(*(ptr)) _x_ = (x); \
|
||
|
|
(__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_, \
|
||
|
|
sizeof(*(ptr))); \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define arch_cmpxchg_local(ptr, o, n) \
|
||
|
|
({ \
|
||
|
|
__typeof__(*(ptr)) _o_ = (o); \
|
||
|
|
__typeof__(*(ptr)) _n_ = (n); \
|
||
|
|
(__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \
|
||
|
|
(unsigned long)_n_, \
|
||
|
|
sizeof(*(ptr))); \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define arch_cmpxchg64_local(ptr, o, n) \
|
||
|
|
({ \
|
||
|
|
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
|
||
|
|
cmpxchg_local((ptr), (o), (n)); \
|
||
|
|
})
|
||
|
|
|
||
|
|
#undef ____xchg
|
||
|
|
#undef ____cmpxchg
|
||
|
|
#define ____xchg(type, args...) __xchg ##type(args)
|
||
|
|
#define ____cmpxchg(type, args...) __cmpxchg ##type(args)
|
||
|
|
#include <asm/xchg.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The leading and the trailing memory barriers guarantee that these
|
||
|
|
* operations are fully ordered.
|
||
|
|
*/
|
||
|
|
#define arch_xchg(ptr, x) \
|
||
|
|
({ \
|
||
|
|
__typeof__(*(ptr)) __ret; \
|
||
|
|
__typeof__(*(ptr)) _x_ = (x); \
|
||
|
|
smp_mb(); \
|
||
|
|
__ret = (__typeof__(*(ptr))) \
|
||
|
|
__xchg((ptr), (unsigned long)_x_, sizeof(*(ptr))); \
|
||
|
|
smp_mb(); \
|
||
|
|
__ret; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define arch_cmpxchg(ptr, o, n) \
|
||
|
|
({ \
|
||
|
|
__typeof__(*(ptr)) __ret; \
|
||
|
|
__typeof__(*(ptr)) _o_ = (o); \
|
||
|
|
__typeof__(*(ptr)) _n_ = (n); \
|
||
|
|
smp_mb(); \
|
||
|
|
__ret = (__typeof__(*(ptr))) __cmpxchg((ptr), \
|
||
|
|
(unsigned long)_o_, (unsigned long)_n_, sizeof(*(ptr)));\
|
||
|
|
smp_mb(); \
|
||
|
|
__ret; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#define arch_cmpxchg64(ptr, o, n) \
|
||
|
|
({ \
|
||
|
|
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
|
||
|
|
arch_cmpxchg((ptr), (o), (n)); \
|
||
|
|
})
|
||
|
|
|
||
|
|
#undef ____cmpxchg
|
||
|
|
|
||
|
|
#endif /* _ALPHA_CMPXCHG_H */
|