On Mon, 4 Apr 2016 13:44:11 +0530
Vignesh R <vigneshr@xxxxxx> wrote:
> Hi,
>
> On 03/31/2016 05:59 PM, Boris Brezillon wrote:
> > Add an helper to check if a virtual address is in the highmem region.
> >
> > Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
> > ---
> > include/linux/highmem.h | 13 +++++++++++++
> > 1 file changed, 13 insertions(+)
> >
> > diff --git a/include/linux/highmem.h b/include/linux/highmem.h
> > index bb3f329..13dff37 100644
> > --- a/include/linux/highmem.h
> > +++ b/include/linux/highmem.h
> > @@ -41,6 +41,14 @@ void kmap_flush_unused(void);
> >
> > struct page *kmap_to_page(void *addr);
> >
> > +static inline bool is_highmem_addr(const void *x)
> > +{
> > + unsigned long vaddr = (unsigned long)x;
> > +
> > + return vaddr >= PKMAP_BASE &&
> > + vaddr < ((PKMAP_BASE + LAST_PKMAP) * PAGE_SIZE);
>
>
> Shouldn't this be:
> vaddr < (PKMAP_BASE + (LAST_PKMAP * PAGE_SIZE)) ?
Oops, yes indeed.
Anyway, given Russell's feedback I don't think I'm gonna follow up on
this series.
Sorry.
Boris
--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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