2009-06-14 20:42:33 +00:00
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From 10276fd993c6e4c92d8086a6ccd0c9e0ff53b053 Mon Sep 17 00:00:00 2001
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From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
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Date: Wed, 10 Dec 2008 20:06:28 -0800
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Subject: [PATCH 058/134] sched: Enable might_sleep before initializing drivers.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=utf-8
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Content-Transfer-Encoding: 8bit
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This allows detection of init bugs in built-in drivers.
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Signed-off-by: Arve Hjønnevåg <arve@android.com>
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---
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kernel/sched.c | 14 ++++++++++++--
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1 files changed, 12 insertions(+), 2 deletions(-)
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--- a/kernel/sched.c
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+++ b/kernel/sched.c
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2009-10-01 10:07:32 +00:00
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@@ -9065,13 +9065,23 @@ void __init sched_init(void)
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2009-06-14 20:42:33 +00:00
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}
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#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
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+static int __might_sleep_init_called;
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+int __init __might_sleep_init(void)
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+{
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+ __might_sleep_init_called = 1;
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+ return 0;
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+}
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+early_initcall(__might_sleep_init);
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+
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void __might_sleep(char *file, int line)
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{
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#ifdef in_atomic
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static unsigned long prev_jiffy; /* ratelimiting */
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- if ((!in_atomic() && !irqs_disabled()) ||
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- system_state != SYSTEM_RUNNING || oops_in_progress)
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+ if ((!in_atomic() && !irqs_disabled()) || oops_in_progress)
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+ return;
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+ if (system_state != SYSTEM_RUNNING &&
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+ (!__might_sleep_init_called || system_state != SYSTEM_BOOTING))
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return;
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if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy)
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return;
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