[patch V2 08/17] mm: Adjust system_state check

From: Thomas Gleixner
Date: Tue May 16 2017 - 14:57:09 EST

To enable smp_processor_id() and might_sleep() debug checks earlier, it's
required to add system states between SYSTEM_BOOTING and SYSTEM_RUNNING.

get_nid_for_pfn() checks for system_state == BOOTING to decide whether to
use early_pfn_to_nid() when CONFIG_DEFERRED_STRUCT_PAGE_INIT=y.

That check is dubious, because the switch to state RUNNING happes way after
page_alloc_init_late() has been invoked.

Change the check to less than RUNNING state so it covers the new
intermediate states as well.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
drivers/base/node.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -377,7 +377,7 @@ static int __ref get_nid_for_pfn(unsigne
if (!pfn_valid_within(pfn))
return -1;
- if (system_state == SYSTEM_BOOTING)
+ if (system_state < SYSTEM_RUNNING)
return early_pfn_to_nid(pfn);
page = pfn_to_page(pfn);