x86: move switch_to macro to system.h
[sfrench/cifs-2.6.git] / include / asm-x86 / system_64.h
1 #ifndef __ASM_SYSTEM_H
2 #define __ASM_SYSTEM_H
3
4 #include <asm/segment.h>
5 #include <asm/cmpxchg.h>
6
7
8 static inline unsigned long read_cr8(void)
9 {
10         unsigned long cr8;
11         asm volatile("movq %%cr8,%0" : "=r" (cr8));
12         return cr8;
13 }
14
15 static inline void write_cr8(unsigned long val)
16 {
17         asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
18 }
19
20 #include <linux/irqflags.h>
21
22 #endif