[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/sbc60xxwdt.c b/drivers/char/watchdog/sbc60xxwdt.c
index f5fb8cc23d52..b6282039198c 100644
--- a/drivers/char/watchdog/sbc60xxwdt.c
+++ b/drivers/char/watchdog/sbc60xxwdt.c
@@ -103,7 +103,7 @@ module_param(nowayout, int, 0);
 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
 
 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;
@@ -122,8 +122,7 @@ static void wdt_timer_ping(unsigned long data)
                 /* Ping the WDT by reading from wdt_start */
                 inb_p(wdt_start);
                 /* 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");
         }
@@ -138,8 +137,7 @@ static void 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);
         printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
 }
 
@@ -363,10 +361,6 @@ static int __init sbc60xxwdt_init(void)
                 }
         }
 
-        init_timer(&timer);
-        timer.function = wdt_timer_ping;
-        timer.data = 0;
-
         rc = misc_register(&wdt_miscdev);
         if (rc)
         {