Linux uses acpi_early_init() to put the ACPI table management into the late stage from the early stage.The two stages are different. the mapped ACPI tables in early stage is temporary and should be unmapped, but in late stage, it permanent and don't need to be unmapped. Originally, mapping and parsing the DMAR table is in the late stage. However, initializing interrupt delivery mode earlier will move it into the early stage. This causes an ACPI error warning when Linux reallocates the ACPI root tables. Because Linux doesn't unmapped the DMAR table after using in the early stage. Invoke acpi_early_init() earlier before late_time_init(), Keep the DMAR be mapped and parsed in late stage like before. Reported-by: Xiaolong Ye <xiaolong.ye@xxxxxxxxx> Signed-off-by: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx> Cc: linux-acpi@xxxxxxxxxxxxxxx Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> Cc: Zheng, Lv <lv.zheng@xxxxxxxxx> --- init/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/init/main.c b/init/main.c index 052481f..52dee20 100644 --- a/init/main.c +++ b/init/main.c @@ -655,12 +655,12 @@ asmlinkage __visible void __init start_kernel(void) kmemleak_init(); setup_per_cpu_pageset(); numa_policy_init(); + acpi_early_init(); if (late_time_init) late_time_init(); calibrate_delay(); pidmap_init(); anon_vma_init(); - acpi_early_init(); #ifdef CONFIG_X86 if (efi_enabled(EFI_RUNTIME_SERVICES)) efi_enter_virtual_mode(); -- 2.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
