Currently e820_reserve_setup_data is called before parsing early params, it works in normal case. But for memmap=exactmap, the final memory ranges are created after parsing memmap= cmdline params, so the previous e820_reserve_setup_data has no effect. For example, setup_data ranges will still be marked as normal system ram, thus when later sysfs driver ioremap them kernel will warn about mapping normal ram. This patch fix it by moving the e820_reserve_setup_data callback after parsing early params so they can be set as reserved ranges and later ioremap will be fine with it. changes: Boris: improve patch description Signed-off-by: Dave Young <dyoung@xxxxxxxxxx> Acked-by: Borislav Petkov <bp@xxxxxxx> --- arch/x86/kernel/setup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 8032615..5a7b2a0 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -941,8 +941,6 @@ void __init setup_arch(char **cmdline_p) iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; setup_memory_map(); parse_setup_data(); - /* update the e820_saved too */ - e820_reserve_setup_data(); copy_edd(); @@ -1004,6 +1002,8 @@ void __init setup_arch(char **cmdline_p) early_dump_pci_devices(); #endif + /* update the e820_saved too */ + e820_reserve_setup_data(); finish_e820_parsing(); if (efi_enabled(EFI_BOOT)) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
