linux-kernel - [PATCH] kernel/: fix BUG_ON checks for cpu notifier callbacks direct call

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Date:	Sat, 29 May 2010 13:04:43 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Cc:	Akinobu Mita <akinobu.mita@...il.com>
Subject: [PATCH] kernel/: fix BUG_ON checks for cpu notifier callbacks direct call

The commit 80b5184cc537718122e036afe7e62d202b70d077
("kernel/: convert cpu notifier to return encapsulate errno value")
changed the return value of cpu notifier callbacks.

Those callbacks don't return NOTIFY_BAD on failures anymore.
But there are a few callbacks which are called directly at init time and
checking the return value.

I forgot to change BUG_ON checking by the direct callers in the commit.

Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
---
 kernel/softirq.c |    2 +-
 kernel/timer.c   |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 825e112..07b4f1b 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -850,7 +850,7 @@ static __init int spawn_ksoftirqd(void)
 	void *cpu = (void *)(long)smp_processor_id();
 	int err = cpu_callback(&cpu_nfb, CPU_UP_PREPARE, cpu);
 
-	BUG_ON(err == NOTIFY_BAD);
+	BUG_ON(err != NOTIFY_OK);
 	cpu_callback(&cpu_nfb, CPU_ONLINE, cpu);
 	register_cpu_notifier(&cpu_nfb);
 	return 0;
diff --git a/kernel/timer.c b/kernel/timer.c
index 2454172..ee305c8 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1717,7 +1717,7 @@ void __init init_timers(void)
 
 	init_timer_stats();
 
-	BUG_ON(err == NOTIFY_BAD);
+	BUG_ON(err != NOTIFY_OK);
 	register_cpu_notifier(&timers_nb);
 	open_softirq(TIMER_SOFTIRQ, run_timer_softirq);
 }
-- 
1.6.0.6

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