On Thu, Aug 22, 2019 at 11:45:34AM +0800, Chester Lin wrote:
> adjust_lowmem_bounds() checks every memblocks in order to find the boundary
> between lowmem and highmem. However some memblocks could be marked as NOMAP
> so they are not used by kernel, which should be skipped while calculating
> the boundary.
>
> Signed-off-by: Chester Lin <c...@suse.com>
> ---
> arch/arm/mm/mmu.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
> index 426d9085396b..b86dba44d828 100644
> --- a/arch/arm/mm/mmu.c
> +++ b/arch/arm/mm/mmu.c
> @@ -1181,6 +1181,9 @@ 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)
> /*
> --
> 2.22.0
>
Hi Russell, Mike and Ard,
Per the discussion in the thread "[PATH] efi/arm: fix allocation failure ...",
(https://lkml.org/lkml/2019/8/21/163), I presume that the change to disregard
NOMAP memblocks in adjust_lowmem_bounds() should be separated as a single patch.
Please let me know if any suggestion, thank you.
