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

[anish kumar <anish198519851985@gmail.com>]

From: anish kumar <anish198519851985@gmail.com>

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@gmail.com>
---
 kernel/watchdog.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 75a2ab3..6ef638b 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -155,6 +155,7 @@ void touch_all_softlockup_watchdogs(void)
 	for_each_online_cpu(cpu)
 		per_cpu(watchdog_touch_ts, cpu) = 0;
 }
+EXPORT_SYMBOL(touch_all_softlockup_watchdogs);
 
 #ifdef CONFIG_HARDLOCKUP_DETECTOR
 void touch_nmi_watchdog(void)
-- 
1.7.1