On Thu, Jun 01, 2017 at 07:26:51AM -0500, Josh Poimboeuf wrote:
> On Thu, Jun 01, 2017 at 01:05:39PM +0200, Peter Zijlstra wrote:
> > On Thu, Jun 01, 2017 at 12:44:16AM -0500, Josh Poimboeuf wrote:
> >
> > > +static struct undwarf *__undwarf_lookup(struct undwarf *undwarf,
> > > + unsigned int num, unsigned long ip)
> > > +{
> > > + struct undwarf *first = undwarf;
> > > + struct undwarf *last = undwarf + num - 1;
> > > + struct undwarf *mid;
> > > + unsigned long u_ip;
> > > +
> > > + while (first <= last) {
> > > + mid = first + ((last - first) / 2);
> > > + u_ip = undwarf_ip(mid);
> > > +
> > > + if (ip >= u_ip) {
> > > + if (ip < u_ip + mid->len)
> > > + return mid;
> > > + first = mid + 1;
> > > + } else
> > > + last = mid - 1;
> > > + }
> > > +
> > > + return NULL;
> > > +}
> >
> > That's a bog standard binary search thing, don't we have a helper for
> > that someplace?
>
> I wasn't able to find one...
Yeah, I looked too and couldn't find it either. A well.
--
To unsubscribe from this list: send the line "unsubscribe live-patching" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
