Quoting Mike Rapoport (2021-12-15 02:01:59) > On Wed, Dec 15, 2021 at 11:49:37AM +0200, Mike Rapoport wrote: > > > > On Tue, Dec 14, 2021 at 11:20:11PM -0800, Stephen Boyd wrote: > > > @@ -482,9 +482,11 @@ static int __init early_init_dt_reserve_memory_arch(phys_addr_t base, > > > if (nomap) { > > > /* > > > * If the memory is already reserved (by another region), we > > > - * should not allow it to be marked nomap. > > > + * should not allow it to be marked nomap, but don't worry > > > + * if the region isn't memory as it won't be mapped. > > > */ > > > - if (memblock_is_region_reserved(base, size)) > > > + if (memblock_overlaps_region(&memblock.memory, base, size) && > > > + memblock_is_region_reserved(base, size)) > > One more small thing. Maybe add pr_warn() here? > There's already a print in __reserved_mem_reserve_reg() when this function returns an error so it doesn't seem very useful to add another print.