[WATCHDOG] timers cleanup

- Use timer macros to set function and data members and to modify
  expiration time.
- Use DEFINE_TIMER for single (platform dependent) watchdog timers and
  do not init them at run-time in these cases.
- del_timer_sync is common in most cases -- we want to wait for timer
  function if it's still running.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Steve Hill <steve@navaho.co.uk>
Cc: Heiko Ronsdorf <hero@ihg.uni-duisburg.de>
Cc: Fernando Fuganti <fuganti@conectiva.com.br>
Cc: Gergely Madarasz <gorgo@itc.hu>
Cc: Ken Hollis <khollis@bitgate.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 3 insertions, 9 deletions

diff --git a/drivers/char/watchdog/sc520_wdt.c b/drivers/char/watchdog/sc520_wdt.c
index ecc73051a3b0..2676a43895a7 100644
--- a/drivers/char/watchdog/sc520_wdt.c
+++ b/drivers/char/watchdog/sc520_wdt.c
@@ -121,7 +121,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _
 static __u16 __iomem *wdtmrctl;
 
 static void wdt_timer_ping(unsigned long);
-static struct timer_list timer;
+static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
 static unsigned long next_heartbeat;
 static unsigned long wdt_is_open;
 static char wdt_expect_close;
@@ -145,8 +145,7 @@ static void wdt_timer_ping(unsigned long data)
                 spin_unlock(&wdt_spinlock);
 
                 /* Re-set the timer interval */
-                timer.expires = jiffies + WDT_INTERVAL;
-                add_timer(&timer);
+                mod_timer(&timer, jiffies + WDT_INTERVAL);
         } else {
                 printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
         }
@@ -179,8 +178,7 @@ static int wdt_startup(void)
         next_heartbeat = jiffies + (timeout * HZ);
 
         /* Start the timer */
-        timer.expires = jiffies + WDT_INTERVAL;
-        add_timer(&timer);
+        mod_timer(&timer, jiffies + WDT_INTERVAL);
 
         /* Start the watchdog */
         wdt_config(WDT_ENB | WDT_WRST_ENB | WDT_EXP_SEL_04);
@@ -389,10 +387,6 @@ static int __init sc520_wdt_init(void)
 
         spin_lock_init(&wdt_spinlock);
 
-        init_timer(&timer);
-        timer.function = wdt_timer_ping;
-        timer.data = 0;
-
         /* Check that the timeout value is within it's range ; if not reset to the default */
         if (wdt_set_heartbeat(timeout)) {
                 wdt_set_heartbeat(WATCHDOG_TIMEOUT);