arch/s390/include/asm/cpu.h

   1 /*
   2  *  include/asm-s390/cpu.h
   3  *
   4  *    Copyright IBM Corp. 2007
   5  *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
   6  */
   7
   8 #ifndef _ASM_S390_CPU_H_
   9 #define _ASM_S390_CPU_H_
  10
  11 #include <linux/types.h>
  12 #include <linux/percpu.h>
  13 #include <linux/spinlock.h>
  14
  15 struct s390_idle_data {
  16         spinlock_t lock;
  17         unsigned int in_idle;
  18         unsigned long long idle_count;
  19         unsigned long long idle_enter;
  20         unsigned long long idle_time;
  21 };
  22
  23 DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
  24
  25 void s390_idle_leave(void);
  26
  27 static inline void s390_idle_check(void)
  28 {
  29         if ((&__get_cpu_var(s390_idle))->in_idle)
  30                 s390_idle_leave();
  31 }
  32
  33 #endif /* _ASM_S390_CPU_H_ */