#ifndef _ALPHA_CMPXCHG_H #define _ALPHA_CMPXCHG_H /* * Atomic exchange routines. */ #define __ASM__MB #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 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 cmpxchg64_local(ptr, o, n) \ ({ \ BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ cmpxchg_local((ptr), (o), (n)); \ }) #ifdef CONFIG_SMP #undef __ASM__MB #define __ASM__MB "\tmb\n" #endif #undef ____xchg #undef ____cmpxchg #define ____xchg(type, args...) __xchg ##type(args) #define ____cmpxchg(type, args...) __cmpxchg ##type(args) #include <asm/xchg.h> #define xchg(ptr, x) \ ({ \ __typeof__(*(ptr)) _x_ = (x); \ (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, \ sizeof(*(ptr))); \ }) #define cmpxchg(ptr, o, n) \ ({ \ __typeof__(*(ptr)) _o_ = (o); \ __typeof__(*(ptr)) _n_ = (n); \ (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \ (unsigned long)_n_, sizeof(*(ptr)));\ }) #define cmpxchg64(ptr, o, n) \ ({ \ BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ cmpxchg((ptr), (o), (n)); \ }) #undef __ASM__MB #undef ____cmpxchg #define __HAVE_ARCH_CMPXCHG 1 #endif /* _ALPHA_CMPXCHG_H */