Re: [PATCH] Fix broken debug output reserve_region_with_split()

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

> >
> > +static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags)
> > +{
> > +       /* room for the actual numbers, the two "0x", -, [, ] and the final zero */
> > +       char sym[4*sizeof(resource_size_t) + 8];
> > +       char *p = sym, *pend = sym + sizeof(sym);
> > +
> > +       *p++ = '[';
> > +       p = number(p, pend, res->start, 16, -1, -1, SPECIAL | SMALL);
> > +       *p++ = '-';
> > +       p = number(p, pend, res->end, 16, -1, -1, SPECIAL | SMALL);
> > +       *p++ = ']';
> > +       *p = 0;
> > +
> > +       return string(buf, end, sym, field_width, precision, flags);
> 
> so x64 64bit,io ports will be print out 8 digital?

With that patch, it will use just as many digits as necessary to display
a given number. The question I'm asking in the comments is whether we
want to instead use fixed digits with zero padding, and in that case,
do we want a hook or something for archs to decide how many digits
for IO vs. memory.

But at least with that in, we can start converting callers. I have a
patch converting PCI that I'll post once that goes in and I'll start
scrubbing arch/powerpc soon.

Cheers,
Ben.