[patch 16/18] init: Introduce SYSTEM_BOOTING_UP/SMP states

Thomas Gleixner
2017-05-14T18:37:41Z

[-- Attachment #1: init--Introduce-SYSTEM_BOOTING_UP-SMP-states.patch --]
[-- Type: text/plain, Size: 1073 bytes --]

might_sleep() debugging should be active right after the scheduler starts
working and smp_processor_id() debugging right before the first non boot
cpu is brought up.

Add two new states which allow to enable those checks earlier and add them
to the xen do_poweroff() function.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
drivers/xen/manage.c | 2 ++
include/linux/kernel.h | 2 ++
2 files changed, 4 insertions(+)

--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -190,6 +190,8 @@ static void do_poweroff(void)
{
switch (system_state) {
case SYSTEM_BOOTING:
+ case SYSTEM_BOOTING_UP:
+ case SYSTEM_BOOTING_SMP:
orderly_poweroff(true);
break;
case SYSTEM_RUNNING:
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -493,6 +493,8 @@ extern bool early_boot_irqs_disabled;
/* Values used for system_state */
extern enum system_states {
SYSTEM_BOOTING,
+ SYSTEM_BOOTING_UP,
+ SYSTEM_BOOTING_SMP,
SYSTEM_RUNNING,
SYSTEM_HALT,
SYSTEM_POWER_OFF,