RE: [PATCH 30/32] x86/intel_rdt_rdtgroup.c: Process schemas input from rscctrl interface

[Yu, Fenghua]

> From: Thomas Gleixner [mailto:tglx@xxxxxxxxxxxxx]
> Sent: Wednesday, July 13, 2016 11:11 PM
> On Wed, 13 Jul 2016, David Carrillo-Cisneros wrote:
> > > +static void free_cache_resource(struct cache_resource *l) {
> > > +       kfree(l->cbm);
> > > +       kfree(l->cbm2);
> > > +       kfree(l->closid);
> > > +       kfree(l->refcnt);
> >
> > this function is used to clean up alloc_cache_resource in the error
> > path of get_resources where it's not necessarily true that all of l's
> > members were allocated.
> 
> kfree handles kfree(NULL) nicely.....

Yes, that's right. If I check the pointer before kfree(), checkpatch.pl will
report warning for that and suggest kfree(NULL) is safe and code is 
short.

Thanks.

-Fenghua