Name
struct prev_cputime — 
  snaphsot of system and user cputime
 
Synopsis
struct prev_cputime {
#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  cputime_t utime;
  cputime_t stime;
  raw_spinlock_t lock;
#endif
};  Members
- utime
- 
time spent in user mode
       
- stime
- 
time spent in system mode
       
- lock
- 
protects the above two fields
       
Description
   Stores previous user/system time values such that we can guarantee
   monotonicity.