[PATCHv2 1/2] mm: introduce get_task_exe_file

[Mateusz Guzik]

On Tue, Aug 23, 2016 at 04:48:13PM +0200, Oleg Nesterov wrote:
> On 08/23, Mateusz Guzik wrote:
> >
> > +struct file *get_task_exe_file(struct task_struct *task)
> > +{
> > +	struct file *exe_file = NULL;
> > +	struct mm_struct *mm;
> > +
> > +	task_lock(task);
> > +	mm = task->mm;
> > +	if (mm) {
> > +		if (!(task->flags & PF_KTHREAD))
> > +			exe_file = get_mm_exe_file(mm);
> > +	}
> > +	task_unlock(task);
> > +	return exe_file;
> > +}
> 
> I can't believe I am going to comment the coding style but I can't resist ;)
> 
> 	if (mm && !(task->flags & PF_KTHREAD)))
> 		exe_file = get_mm_exe_file(mm);
> 
> looks a bit simpler to me. But this is purely cosmetic and subjective,
> both patches look good to me.
> 

Actually I did it for some consistency with get_task_mm.

The check can likely be done prior to taking the lock in both functions
and that would clean them up a little bit, but I wanted to avoid nit
picking... :>

> Acked-by: Oleg Nesterov <oleg at redhat.com>
> 

Thanks

-- 
Mateusz Guzik