Re: [tip:sched/core] sched/cpuacct: Split usage accounting into user_usage and sys_usage

[Anton Blanchard]

Hi,

> > >  void cpuacct_charge(struct task_struct *tsk, u64 cputime)
> > >  {
> > >  	struct cpuacct *ca;
> > > +	int index;
> > > +
> > > +	if (user_mode(task_pt_regs(tsk)))
> > > +		index = CPUACCT_USAGE_USER;
> > > +	else
> > > +		index = CPUACCT_USAGE_SYSTEM;

This is oopsing because PowerPC task_pt_regs() returns NULL for
kernel threads.

Anton