[patch 15/18] mm/vmscan: Adjust system_state checks

[Thomas Gleixner]

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

Adjust the system_state check in kswapd_run() to handle the extra states.

Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Johannes Weiner <han...@cmpxchg.org>
Cc: Mel Gorman <mgor...@techsingularity.net>
Cc: Michal Hocko <mho...@suse.com>
Cc: Vlastimil Babka <vba...@suse.cz>
Cc: linux...@kvack.org
---
 mm/vmscan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3643,7 +3643,7 @@ int kswapd_run(int nid)
        pgdat->kswapd = kthread_run(kswapd, pgdat, "kswapd%d", nid);
        if (IS_ERR(pgdat->kswapd)) {
                /* failure at boot is fatal */
-               BUG_ON(system_state == SYSTEM_BOOTING);
+               BUG_ON(system_state < SYSTEM_RUNNING);
                pr_err("Failed to start kswapd on node %d\n", nid);
                ret = PTR_ERR(pgdat->kswapd);
                pgdat->kswapd = NULL;