From: Lee, Chun-Yi <joeyli.kernel@gmail.com>
Date: Wed, 15 Jan 2014 07:25:48 +0000 (+0800)
Subject: ACPI / init: Run acpi_early_init() before timekeeping_init()
X-Git-Tag: firefly_0821_release~176^2~4497^2~1^4~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=73f7d1ca3263;p=firefly-linux-kernel-4.4.55.git

ACPI / init: Run acpi_early_init() before timekeeping_init()

This is a variant patch from Rafael J. Wysocki's
ACPI / init: Run acpi_early_init() before efi_enter_virtual_mode()

According to Matt Fleming, if acpi_early_init() was executed before
efi_enter_virtual_mode(), the EFI initialization could benefit from
it, so Rafael's patch makes that happen.

And, we want accessing ACPI TAD device to set system clock, so move
acpi_early_init() before timekeeping_init(). This final position is
also before efi_enter_virtual_mode().

Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/init/main.c b/init/main.c
index febc511e078a..b6d93c840154 100644
--- a/init/main.c
+++ b/init/main.c
@@ -565,6 +565,7 @@ asmlinkage void __init start_kernel(void)
 	init_timers();
 	hrtimers_init();
 	softirq_init();
+	acpi_early_init();
 	timekeeping_init();
 	time_init();
 	sched_clock_postinit();
@@ -641,7 +642,6 @@ asmlinkage void __init start_kernel(void)
 
 	check_bugs();
 
-	acpi_early_init(); /* before LAPIC and SMP init */
 	sfi_init_late();
 
 	if (efi_enabled(EFI_RUNTIME_SERVICES)) {