Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer updates from Thomas Gleixner:
 "Yet another big pile of changes:

   - More year 2038 work from Arnd slowly reaching the point where we
     need to think about the syscalls themself.

   - A new timer function which allows to conditionally (re)arm a timer
     only when it's either not running or the new expiry time is sooner
     than the armed expiry time. This allows to use a single timer for
     multiple timeout requirements w/o caring about the first expiry
     time at the call site.

   - A new NMI safe accessor to clock real time for the printk timestamp
     work. Can be used by tracing, perf as well if required.

   - A large number of timer setup conversions from Kees which got
     collected here because either maintainers requested so or they
     simply got ignored. As Kees pointed out already there are a few
     trivial merge conflicts and some redundant commits which was
     unavoidable due to the size of this conversion effort.

   - Avoid a redundant iteration in the timer wheel softirq processing.

   - Provide a mechanism to treat RTC implementations depending on their
     hardware properties, i.e. don't inflict the write at the 0.5
     seconds boundary which originates from the PC CMOS RTC to all RTCs.
     No functional change as drivers need to be updated separately.

   - The usual small updates to core code clocksource drivers. Nothing
     really exciting"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (111 commits)
  timers: Add a function to start/reduce a timer
  pstore: Use ktime_get_real_fast_ns() instead of __getnstimeofday()
  timer: Prepare to change all DEFINE_TIMER() callbacks
  netfilter: ipvs: Convert timers to use timer_setup()
  scsi: qla2xxx: Convert timers to use timer_setup()
  block/aoe: discover_timer: Convert timers to use timer_setup()
  ide: Convert timers to use timer_setup()
  drbd: Convert timers to use timer_setup()
  mailbox: Convert timers to use timer_setup()
  crypto: Convert timers to use timer_setup()
  drivers/pcmcia: omap1: Fix error in automated timer conversion
  ARM: footbridge: Fix typo in timer conversion
  drivers/sgi-xp: Convert timers to use timer_setup()
  drivers/pcmcia: Convert timers to use timer_setup()
  drivers/memstick: Convert timers to use timer_setup()
  drivers/macintosh: Convert timers to use timer_setup()
  hwrng/xgene-rng: Convert timers to use timer_setup()
  auxdisplay: Convert timers to use timer_setup()
  sparc/led: Convert timers to use timer_setup()
  mips: ip22/32: Convert timers to use timer_setup()
  ...

1 files changed, 12 insertions, 17 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 13f67b5a0a0c..7368b57842ea 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1493,9 +1493,9 @@ bool queue_work_on(int cpu, struct workqueue_struct *wq,
 }
 EXPORT_SYMBOL(queue_work_on);
 
-void delayed_work_timer_fn(unsigned long __data)
+void delayed_work_timer_fn(struct timer_list *t)
 {
-        struct delayed_work *dwork = (struct delayed_work *)__data;
+        struct delayed_work *dwork = from_timer(dwork, t, timer);
 
         /* should have been called from irqsafe timer with irq already off */
         __queue_work(dwork->cpu, dwork->wq, &dwork->work);
@@ -1509,8 +1509,7 @@ static void __queue_delayed_work(int cpu, struct workqueue_struct *wq,
         struct work_struct *work = &dwork->work;
 
         WARN_ON_ONCE(!wq);
-        WARN_ON_ONCE(timer->function != delayed_work_timer_fn ||
-                     timer->data != (unsigned long)dwork);
+        WARN_ON_ONCE(timer->function != (TIMER_FUNC_TYPE)delayed_work_timer_fn);
         WARN_ON_ONCE(timer_pending(timer));
         WARN_ON_ONCE(!list_empty(&work->entry));
 
@@ -1833,9 +1832,9 @@ static void destroy_worker(struct worker *worker)
         wake_up_process(worker->task);
 }
 
-static void idle_worker_timeout(unsigned long __pool)
+static void idle_worker_timeout(struct timer_list *t)
 {
-        struct worker_pool *pool = (void *)__pool;
+        struct worker_pool *pool = from_timer(pool, t, idle_timer);
 
         spin_lock_irq(&pool->lock);
 
@@ -1881,9 +1880,9 @@ static void send_mayday(struct work_struct *work)
         }
 }
 
-static void pool_mayday_timeout(unsigned long __pool)
+static void pool_mayday_timeout(struct timer_list *t)
 {
-        struct worker_pool *pool = (void *)__pool;
+        struct worker_pool *pool = from_timer(pool, t, mayday_timer);
         struct work_struct *work;
 
         spin_lock_irq(&pool->lock);
@@ -3223,11 +3222,9 @@ static int init_worker_pool(struct worker_pool *pool)
         INIT_LIST_HEAD(&pool->idle_list);
         hash_init(pool->busy_hash);
 
-        setup_deferrable_timer(&pool->idle_timer, idle_worker_timeout,
-                               (unsigned long)pool);
+        timer_setup(&pool->idle_timer, idle_worker_timeout, TIMER_DEFERRABLE);
 
-        setup_timer(&pool->mayday_timer, pool_mayday_timeout,
-                    (unsigned long)pool);
+        timer_setup(&pool->mayday_timer, pool_mayday_timeout, 0);
 
         mutex_init(&pool->attach_mutex);
         INIT_LIST_HEAD(&pool->workers);
@@ -5370,11 +5367,8 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq)	{ }
  */
 #ifdef CONFIG_WQ_WATCHDOG
 
-static void wq_watchdog_timer_fn(unsigned long data);
-
 static unsigned long wq_watchdog_thresh = 30;
-static struct timer_list wq_watchdog_timer =
-        TIMER_DEFERRED_INITIALIZER(wq_watchdog_timer_fn, 0, 0);
+static struct timer_list wq_watchdog_timer;
 
 static unsigned long wq_watchdog_touched = INITIAL_JIFFIES;
 static DEFINE_PER_CPU(unsigned long, wq_watchdog_touched_cpu) = INITIAL_JIFFIES;
@@ -5388,7 +5382,7 @@ static void wq_watchdog_reset_touched(void)
                 per_cpu(wq_watchdog_touched_cpu, cpu) = jiffies;
 }
 
-static void wq_watchdog_timer_fn(unsigned long data)
+static void wq_watchdog_timer_fn(struct timer_list *unused)
 {
         unsigned long thresh = READ_ONCE(wq_watchdog_thresh) * HZ;
         bool lockup_detected = false;
@@ -5490,6 +5484,7 @@ module_param_cb(watchdog_thresh, &wq_watchdog_thresh_ops, &wq_watchdog_thresh,
 
 static void wq_watchdog_init(void)
 {
+        timer_setup(&wq_watchdog_timer, wq_watchdog_timer_fn, TIMER_DEFERRABLE);
         wq_watchdog_set_thresh(wq_watchdog_thresh);
 }