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authorMarcin Slusarz <marcin.slusarz@gmail.com>2011-01-28 11:00:32 -0500
committerIngo Molnar <mingo@elte.hu>2011-01-31 13:22:43 +0100
commit397357666de6b5b6adb5fa99f9758ec8cf30ac34 (patch)
treece7e63588928ae0fc3b72e12e5d4298b09916ddf /kernel
parent4135038a582c20ffdadfcf6564852e0b72a20968 (diff)
downloadlinux-linaro-stable-397357666de6b5b6adb5fa99f9758ec8cf30ac34.tar.gz
watchdog: Fix sysctl consistency
If it was not possible to enable watchdog for any cpu, switch watchdog_enabled back to 0, because it's visible via kernel.watchdog sysctl. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: <stable@kernel.org> LKML-Reference: <1296230433-6261-2-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/watchdog.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index d9961ea1c3f4..c7e0049344bd 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -429,9 +429,6 @@ static int watchdog_enable(int cpu)
wake_up_process(p);
}
- /* if any cpu succeeds, watchdog is considered enabled for the system */
- watchdog_enabled = 1;
-
return 0;
}
@@ -459,12 +456,16 @@ static void watchdog_disable(int cpu)
static void watchdog_enable_all_cpus(void)
{
int cpu;
- int result = 0;
+
+ watchdog_enabled = 0;
for_each_online_cpu(cpu)
- result += watchdog_enable(cpu);
+ if (!watchdog_enable(cpu))
+ /* if any cpu succeeds, watchdog is considered
+ enabled for the system */
+ watchdog_enabled = 1;
- if (result)
+ if (!watchdog_enabled)
printk(KERN_ERR "watchdog: failed to be enabled on some cpus\n");
}