Re: [patch 1/5] mm: remap_vmalloc_range

[Andrew Morton]

Nick Piggin <npiggin@xxxxxxx> wrote:
>
> > 
> > - are vma->vm_start and vma->vm_end always a multiple of PAGE_SIZE?  (I
> >   always forget).  If not, remap_valloc_range() looks a tad buggy.
> 
> I hope so.

do_mmap_pgoff() seems to dtrt.  It makes one wonder why vm_start and vm_end
aren't in units of PAGE_SIZE.

> > 
> > - remap_valloc_range() would lose a whole buncha typecasts if you use the
> >   gcc pointer-arith-with-void* extension.
> 
> Should I?

Well it's a gccism, and a good one.  We have lots of gccisms and using this
one here will neaten things up.
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