[PATCH 2/3] powerpc/mm/hash: Refactor hash__mark_rodata_ro()

[Balbir Singh]

On Fri, Jul 14, 2017 at 4:51 PM, Michael Ellerman <mpe at ellerman.id.au> wrote:
> Move the core logic into a helper, so we can use it for changing other
> permissions.
>
> We also change the logic to align start down, and end up. This means
> calling the function with a range will expand that range to be at
> least 1 mmu_linear_psize page in size. We need that so we can use it
> on __init_begin ...  __init_end which is not a full page in size.
>
> This should always work for _stext/__init_begin, because we align
> __init_begin to _stext + 16M in the linker script.
>
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
> ---

Reviewed-by: Balbir Singh <bsingharora at gmail.com>