Change the EFI memory reservation logic to use memblock_mark_nomap() rather than memblock_reserve() to mark UEFI reserved regions as occupied. In addition to reserving them against allocations done by memblock, this will also prevent them from being covered by the linear mapping. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> --- arch/arm64/kernel/efi.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index e8ca6eaedd02..f609325c4a83 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -193,7 +193,7 @@ static __init void reserve_regions(void) early_init_dt_add_memory_arch(paddr, size); if (is_reserve_region(md)) { - memblock_reserve(paddr, size); + memblock_mark_nomap(paddr, size); if (uefi_debug) pr_cont("*"); } @@ -215,8 +215,6 @@ void __init efi_init(void) efi_system_table = params.system_table; - memblock_reserve(params.mmap & PAGE_MASK, - PAGE_ALIGN(params.mmap_size + (params.mmap & ~PAGE_MASK))); memmap.phys_map = (void *)params.mmap; memmap.map = early_memremap(params.mmap, params.mmap_size); memmap.map_end = memmap.map + params.mmap_size; @@ -228,6 +226,7 @@ void __init efi_init(void) reserve_regions(); early_memunmap(memmap.map, params.mmap_size); + memblock_mark_nomap(params.mmap, params.mmap_size); } static bool __init efi_virtmap_init(void) -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>