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 long long idle_count;
  18         unsigned long long idle_enter;
  19         unsigned long long idle_time;
  20 };
  21
  22 DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
  23
  24 void vtime_start_cpu(void);
  25
  26 static inline void s390_idle_check(void)
  27 {
  28         if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
  29                 vtime_start_cpu();
  30 }
  31
  32 #endif /* _ASM_S390_CPU_H_ */