[PATCH] introduce setup_timer() helper

Every user of init_timer() also needs to initialize ->function and ->data
fields.  This patch adds a simple setup_timer() helper for that.

The schedule_timeout() is patched as an example of usage.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 15 insertions, 10 deletions

diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index b2a238b5a17e..c6c9791d77c1 100644
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -494,7 +494,7 @@ void invalidate_interrupt7(void);
 void thermal_interrupt(void);
 void i8254_timer_resume(void);
 
-static void setup_timer(void)
+static void setup_timer_hardware(void)
 {
         outb_p(0x34,0x43);              /* binary, mode 2, LSB/MSB, ch 0 */
         udelay(10);
@@ -505,13 +505,13 @@ static void setup_timer(void)
 
 static int timer_resume(struct sys_device *dev)
 {
-        setup_timer();
+        setup_timer_hardware();
         return 0;
 }
 
 void i8254_timer_resume(void)
 {
-        setup_timer();
+        setup_timer_hardware();
 }
 
 static struct sysdev_class timer_sysclass = {
@@ -594,7 +594,7 @@ void __init init_IRQ(void)
          * Set the clock to HZ Hz, we already have a valid
          * vector now:
          */
-        setup_timer();
+        setup_timer_hardware();
 
         if (!acpi_ioapic)
                 setup_irq(2, &irq2);
diff --git a/include/linux/timer.h b/include/linux/timer.h
index 3340f3bd135d..ddd5bbe1fc8e 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -38,6 +38,15 @@ extern struct timer_base_s __init_timer_base;
 
 void fastcall init_timer(struct timer_list * timer);
 
+static inline void setup_timer(struct timer_list * timer,
+                                void (*function)(unsigned long),
+                                unsigned long data)
+{
+        timer->function = function;
+        timer->data = data;
+        init_timer(timer);
+}
+
 /***
  * timer_pending - is a timer pending?
  * @timer: the timer in question
diff --git a/kernel/timer.c b/kernel/timer.c
index 6a2e5f8dc725..6ed1a826e5ce 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1146,12 +1146,8 @@ fastcall signed long __sched schedule_timeout(signed long timeout)
 
         expire = timeout + jiffies;
 
-        init_timer(&timer);
-        timer.expires = expire;
-        timer.data = (unsigned long) current;
-        timer.function = process_timeout;
-
-        add_timer(&timer);
+        setup_timer(&timer, process_timeout, (unsigned long)current);
+        __mod_timer(&timer, expire);
         schedule();
         del_singleshot_timer_sync(&timer);