Re: oh crap...

[Joe Perches <joe@perches.com>]

On Wed, 2008-10-29 at 11:31 -0700, David Miller wrote:
> From: Joe Perches <joe@perches.com>
> Date: Wed, 29 Oct 2008 11:16:54 -0700
> > On Wed, 2008-10-29 at 10:24 -0700, Harvey Harrison wrote:
> > > Putting a modifier after the format specifier seems a little strange to me.
> > Harvey, please remember the whole %p<foo> concept is based on
> > modifier after format specifier.
> I don't think there is any such strict rule, or even that we'd
> want to enforce that.

Of course there's a strict rule.

"%<flags>p" is a normal format conversion specifier.
It takes a pointer as its argument.
Character(s) immediately after the pointer conversion
specifier "p" may be linux-specific format modifiers.

> There is nothing wrong with saying something like %pI6 where
> the "I" signifies "internet address in 'natural' form" and
> "6" is the 'modifier' which you love so much which means
> "oh btw, it's ipv6"

True enough.  6 and I6 are both modifiers.

I have been doodling with sparse to verify the pointer types.
I just want a simple rule: char after "%<flag>p" specifies pointer type.

Ideally it would be:

4: __be32 *
6: struct in6_addr *
R: struct resource *
M: char *

cheers, Joe