1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef __ASM_CMPXCHG_H 13 #define __ASM_CMPXCHG_H 14 15 #include <linux/bitops.h> 16 17 #define xchg(ptr,v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr)))) 18 19 struct __xchg_dummy { unsigned long a[100]; }; 20 #define __xg(x) ((struct __xchg_dummy *)(x)) 21 22 #define ll_low(x) *(((unsigned int*)&(x))+0) 23 #define ll_high(x) *(((unsigned int*)&(x))+1) 24 #define set_64bit(ptr,value) (__builtin_constant_p(value) ? __set_64bit_constant(ptr, value) : __set_64bit_var(ptr, value) ) 25 #define _set_64bit(ptr,value) (__builtin_constant_p(value) ? __set_64bit(ptr, (unsigned int)(value), (unsigned int)((value)>>32ULL) ) : __set_64bit(ptr, ll_low(value), ll_high(value)) ) 26 27 #define cmpxchg(ptr,o,n) ({ __typeof__(*(ptr)) __ret; if (likely(boot_cpu_data.x86 > 3)) __ret = __cmpxchg((ptr), (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))); else __ret = cmpxchg_386((ptr), (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))); __ret; }) 28 #define cmpxchg_local(ptr,o,n) ({ __typeof__(*(ptr)) __ret; if (likely(boot_cpu_data.x86 > 3)) __ret = __cmpxchg_local((ptr), (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))); else __ret = cmpxchg_386((ptr), (unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))); __ret; }) 29 #define cmpxchg64(ptr,o,n) ((__typeof__(*(ptr)))__cmpxchg64((ptr),(unsigned long long)(o), (unsigned long long)(n))) 30 #define cmpxchg64_local(ptr,o,n) ((__typeof__(*(ptr)))__cmpxchg64_local((ptr),(unsigned long long)(o), (unsigned long long)(n))) 31 #endif 32
