[PATCH] [Watchdog][Trivial] Added comments to explain watchdog_disabled variable

From: anish kumar
Date: Sat Feb 16 2013 - 07:14:56 EST

From: anish kumar <anish198519851985@xxxxxxxxx>

This watchdog_disabled flag is bit of cryptic.Howerver it's usefullnes is multifold.
Uses are:
1. Check if smpboot_register_percpu_thread function passed.
2. Makes sure that user enables and disables the watchdog in sequence
i.e. enable watchdog->disable watchdog->enable watchdog
Unlike enable watchdog->enable watchdog which is wrong.

Signed-off-by: anish kumar <anish198519851985@xxxxxxxxx>
kernel/watchdog.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 75a2ab3..8a20ebe 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -518,6 +518,11 @@ int proc_dowatchdog(struct ctl_table *table, int write,
return ret;

+ /*
+ * Watchdog threads shouldn't be enabled if they are
+ * disabled.'watchdog_disabled' variable check in
+ * watchdog_*_all_cpus() function takes care of this.
+ */
if (watchdog_enabled && watchdog_thresh)

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