sched: Enable might_sleep before initializing drivers.

This allows detection of init bugs in built-in drivers.

Signed-off-by: Arve Hjønnevåg <arve@android.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 8e2558c2ba67..2633e3da8452 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -8506,13 +8506,23 @@ void __init sched_init(void)
 }
 
 #ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
+static int __might_sleep_init_called;
+int __init __might_sleep_init(void)
+{
+	__might_sleep_init_called = 1;
+	return 0;
+}
+early_initcall(__might_sleep_init);
+
 void __might_sleep(char *file, int line)
 {
 #ifdef in_atomic
 	static unsigned long prev_jiffy;	/* ratelimiting */
 
-	if ((!in_atomic() && !irqs_disabled()) ||
-		    system_state != SYSTEM_RUNNING || oops_in_progress)
+	if ((!in_atomic() && !irqs_disabled()) || oops_in_progress)
+		return;
+	if (system_state != SYSTEM_RUNNING &&
+	    (!__might_sleep_init_called || system_state != SYSTEM_BOOTING))
 		return;
 	if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy)
 		return;