linux-kernel - Re: linux-next: Tree for Feb 9

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Date:	Tue, 9 Feb 2016 16:01:18 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Linux-Next <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Jeremy Linton <jeremy.linton@....com>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	Laura Abbott <labbott@...oraproject.org>
Subject: Re: linux-next: Tree for Feb 9

On Tue, Feb 09, 2016 at 04:08:03PM +0100, Arnd Bergmann wrote:
> On Tuesday 09 February 2016 14:35:54 Mark Rutland wrote:
> > diff --git a/include/asm-generic/fixmap.h b/include/asm-generic/fixmap.h
> > index f9c27b6..e5255ff 100644
> > --- a/include/asm-generic/fixmap.h
> > +++ b/include/asm-generic/fixmap.h
> > @@ -69,6 +69,8 @@ static inline unsigned long virt_to_fix(const unsigned long vaddr)
> >         __set_fixmap(idx, 0, FIXMAP_PAGE_CLEAR)
> >  #endif
> >  
> > +void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
> > +
> >  /* Return a pointer with offset calculated */
> >  static inline unsigned long __set_fixmap_offset(enum fixed_addresses idx,
> >                                                 phys_addr_t phys,
> > 
> 
> 
> I think there is a conflicting declaration in arch/x86/include/asm/paravirt.h:
> 
> static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
>                                 phys_addr_t phys, pgprot_t flags)
> {
>         pv_mmu_ops.set_fixmap(idx, phys, flags);
> }
> 
> Can you test on x86 with CONFIG_PARAVIRT set?

That builds fine for me atop of for-next/pgtable, both 64-bit and
32-bit.

GCC seems to treat enum fixed_addresses the same as unsigned. Only if I
change the type of idx in fixmap.h (e.g. to char) do I get a conflict
against paravirt.h

Mark.