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sched: Enable might_sleep before initializing drivers.

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

Signed-off-by: Arve Hjønnevåg <arve@android.com>
This commit is contained in:
Arve Hjønnevåg
2008-12-10 20:06:28 -08:00
committed by Colin Cross
parent dcb99fd9b0
commit bbe594b835
1 changed files with 12 additions and 1 deletions
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13
kernel/sched/core.c
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@@ -6942,13 +6942,24 @@ static inline int preempt_count_equals(int preempt_offset)
return (nested == preempt_offset);
}
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(const char *file, int line, int preempt_offset)
{
static unsigned long prev_jiffy; /* ratelimiting */
rcu_sleep_check(); /* WARN_ON_ONCE() by default, no rate limit reqd. */
if ((preempt_count_equals(preempt_offset) && !irqs_disabled()) ||
system_state != SYSTEM_RUNNING || oops_in_progress)
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;