On Mon, Apr 26, 2021 at 11:55:00AM +0000, Vladimir Isaev wrote: > Hi Mike, > > On Mon, April 26, 2021 2:29 PM, Mike Rapoport wrote: > > On Mon, Apr 26, 2021 at 01:10:04PM +0300, Vladimir Isaev wrote: > > > - max_zone_pfn[ZONE_HIGHMEM] = min_low_pfn; > > > + max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn; > > > > This is correct with PAE40, but it will break !PAE40 when "highmem" has lower > > addresses than lowmem. > > > > It rather should be something like: > > > > if (IS_ENABLED(CONFIG_ARC_HAS_PAE40)) > > max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn; > > else > > max_zone_pfn[ZONE_HIGHMEM] = min_low_pfn; > > > > Not sure if I understand why we should have min_low_pfn here. In !PAE40 > case max_high_pfn just will be smaller than min_low_pfn. Hmm, actually, you are right. This should be fine. -- Sincerely yours, Mike.
