On 5 January 2015 at 18:33, Leif Lindholm <leif.lindholm@xxxxxxxxxx> wrote:
> arm64 does not support early_memremap/memunmap/ioremap/iounmap after
> paging_init() has been called. The core early_*remap code handles this
> via the after_paging_init variable, which is set by a call to
> early_ioremap_reset().
>
> However, arm64 currently does not call early_ioremap_reset(), which
> has made it possible to poke around in the fixmap region after kmap
> is enabled. Add the required call.
>
> Signed-off-by: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
Acked-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Perhaps add 'Fixes' and 'Cc: stable' tags as well?
> ---
> arch/arm64/mm/mmu.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
> index 6032f3e..506544f 100644
> --- a/arch/arm64/mm/mmu.c
> +++ b/arch/arm64/mm/mmu.c
> @@ -348,6 +348,7 @@ void __init paging_init(void)
> {
> void *zero_page;
>
> + early_ioremap_reset();
> map_mem();
>
> /*
> --
> 2.1.3
>
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