On Wed, 2008-01-23 at 09:47 +0100, Peter Zijlstra wrote:
> On Wed, 2008-01-23 at 02:21 +0300, Anton Salikhmetov wrote:
> > +static void vma_wrprotect(struct vm_area_struct *vma)
> > +{
> > + unsigned long addr = vma->vm_start;
> > + pgd_t *pgd = pgd_offset(vma->vm_mm, addr);
> > +
> > + while (addr < vma->vm_end) {
> > + unsigned long next = pgd_addr_end(addr, vma->vm_end);
> > +
> > + if (!pgd_none_or_clear_bad(pgd))
> > + vma_wrprotect_pgd_range(vma, pgd, addr, next);
> > +
> > + ++pgd;
> > + addr = next;
> > + }
> > +}
>
> I think you want to pass start, end here too, you might not need to
> sweep the whole vma.
Also, it still doesn't make sense to me why we'd not need to walk the
rmap, it is all the same file after all.
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