[RFC PATCH] arm64:mm: delete max_mapnr init.

[Will Deacon]

On Thu, Sep 11, 2014 at 12:43:11PM +0100, Ganapatrao Kulkarni wrote:
> On Thu, Sep 11, 2014 at 4:06 PM, Will Deacon <will.deacon at arm.com> wrote:
> > On Thu, Sep 11, 2014 at 10:16:13AM +0100, Ganapatrao Kulkarni wrote:
> >> setting max_mapnr results in to error, if enabled with CONFIG_NUMA,
> >> which i have to replace with function set_max_mapnr.
> >> However this variable is not used in arm64(with default defconfig) and better to
> >> delete instead.
> >>
> >> Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni at caviumnetworks.com>
> >> ---
> >>  arch/arm64/mm/init.c | 1 -
> >>  1 file changed, 1 deletion(-)
> >>
> >> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> >> index 5472c24..548bd01 100644
> >> --- a/arch/arm64/mm/init.c
> >> +++ b/arch/arm64/mm/init.c
> >> @@ -256,7 +256,6 @@ static void __init free_unused_memmap(void)
> >>   */
> >>  void __init mem_init(void)
> >>  {
> >> -     max_mapnr   = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
> >
> > I think it's cleaner to call set_max_mapnr in case this grows a use in core
> > code outside of pfn_valid (which we always override).
> agreed, thanks for your comment.
> shall i send you the patch for this?

Yes, please. Given that we don't support NUMA in mainline, the patch will be
queued for 3.18 (via Catalin).

Will