On Tue, 20 Aug 2019 at 14:56, Russell King - ARM Linux admin <linux@xxxxxxxxxxxxxxx> wrote: > > On Fri, Aug 02, 2019 at 05:38:54AM +0000, Chester Lin wrote: > > diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c > > index f3ce34113f89..909b11ba48d8 100644 > > --- a/arch/arm/mm/mmu.c > > +++ b/arch/arm/mm/mmu.c > > @@ -1184,6 +1184,9 @@ void __init adjust_lowmem_bounds(void) > > phys_addr_t block_start = reg->base; > > phys_addr_t block_end = reg->base + reg->size; > > > > + if (memblock_is_nomap(reg)) > > + continue; > > + > > if (reg->base < vmalloc_limit) { > > if (block_end > lowmem_limit) > > /* > > I think this hunk is sane - if the memory is marked nomap, then it isn't > available for the kernel's use, so as far as calculating where the > lowmem/highmem boundary is, it effectively doesn't exist and should be > skipped. > I agree. Chester, could you explain what you need beyond this change (and my EFI stub change involving TEXT_OFFSET) to make things work on the RPi2?