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SubjectRe: linux-next: Tree for April 10 (arch/x86)
On Mon, 14 Apr 2008 04:40:49 -0400 Jakub Jelinek wrote:

> On Fri, Apr 11, 2008 at 08:19:01AM -0700, Randy Dunlap wrote:
> > On Fri, 11 Apr 2008 09:46:31 +0200 Ingo Molnar wrote:
> >
> > >
> > > * Randy Dunlap <randy.dunlap@oracle.com> wrote:
> > >
> > > > Fix printk formats in x86/mm/ioremap.c:
> > > >
> > > > next-20080410/arch/x86/mm/ioremap.c:137: warning: format '%llx' expects type 'long long unsigned int', but argument 2 has type 'resource_size_t'
> > > > next-20080410/arch/x86/mm/ioremap.c:188: warning: format '%llx' expects type 'long long unsigned int', but argument 2 has type 'resource_size_t'
> > > > next-20080410/arch/x86/mm/ioremap.c:188: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'long unsigned int'
> > >
> > > thanks, applied.
> > >
> > > > if (!phys_addr_valid(phys_addr)) {
> > > > printk(KERN_WARNING "ioremap: invalid physical address %llx\n",
> > > > - phys_addr);
> > > > + (unsigned long long)phys_addr);
> > >
> > > is there really no way to solve this more cleanly than a forced cast?
> >
> > I haven't seen any other decent solutions. This is what we do
> > all over the kernel.
>
> You can define macros and use them in the format string.
> In this case
> printk(KERN_WARNING "ioremap: invalid physical address %" PRIRESOURCESZ "\n",
> phys_addr);
> (see the PRI* macros in
> http://www.opengroup.org/onlinepubs/009695399/basedefs/inttypes.h.html
> and e.g. glibc inttypes.h to see how it is defined). Other alternative is
> custom format length modifiers, but unfortunately there is no easy way ATM
> to teach GCC about them.

Hi,
I tried this.

In this particular case, phys_addr is a type(def) of resource_size_t,
so we still get gcc warnings:

next-20080410/arch/x86/mm/ioremap.c: In function '__ioremap':
next-20080410/arch/x86/mm/ioremap.c:137: warning: format '%lx' expects type 'long unsigned int', but argument 2 has type 'resource_size_t'
next-20080410/arch/x86/mm/ioremap.c:188: warning: format '%lx' expects type 'long unsigned int', but argument 2 has type 'resource_size_t'

so we still need to cast phys_addr either to (unsigned long) or
(unsigned long long). Rigth? or am I missing something? if so, what?

Thanks,
---
~Randy


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