linux-kernel - Re: [CFT] MM: Pass a PTE pointer to update_mmu

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Message-ID: <20100120165443.GB3284@flint.arm.linux.org.uk>
Date:	Wed, 20 Jan 2010 16:54:44 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [CFT] MM: Pass a PTE pointer to update_mmu_cache() rather than
	the PTE itself

On Wed, Jan 20, 2010 at 05:45:34PM +0100, Geert Uytterhoeven wrote:
> > diff --git a/Documentation/cachetlb.txt b/Documentation/cachetlb.txt
> > index da42ab4..74a8b6f 100644
> > --- a/Documentation/cachetlb.txt
> > +++ b/Documentation/cachetlb.txt
> > @@ -88,12 +88,12 @@ changes occur:
> >        This is used primarily during fault processing.
> >
> >  5) void update_mmu_cache(struct vm_area_struct *vma,
> > -                        unsigned long address, pte_t pte)
> > +                        unsigned long address, pte_t *ptep)
> >
> >        At the end of every page fault, this routine is invoked to
> >        tell the architecture specific code that a translation
> > -       described by "pte" now exists at virtual address "address"
> > -       for address space "vma->vm_mm", in the software page tables.
> > +       now exists at virtual address "address" for address space
> > +       "vma->vm_mm", in the software page tables.
> >
> >        A port may use this information in any way it so chooses.
> >        For example, it could use this event to pre-load TLB
> 
> Now the documentation no longer mentions what the 3rd parameter is used for?

I'm open to suggestions for a suitable description for it.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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