[PATCH] PM: Convert timers to use timer_setup()

[Kees Cook]

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. Removes test of .data field, since
that will be going away.

Cc: "Rafael J. Wysocki" <r...@rjwysocki.net>
Cc: Pavel Machek <pa...@ucw.cz>
Cc: Len Brown <len.br...@intel.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: linux...@vger.kernel.org
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
 drivers/base/power/runtime.c |  7 +++----
 drivers/base/power/wakeup.c  | 11 +++++------
 2 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 7bcf80fa9ada..1cea431c0adf 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -894,9 +894,9 @@ static void pm_runtime_work(struct work_struct *work)
  *
  * Check if the time is right and queue a suspend request.
  */
-static void pm_suspend_timer_fn(unsigned long data)
+static void pm_suspend_timer_fn(struct timer_list *t)
 {
-       struct device *dev = (struct device *)data;
+       struct device *dev = from_timer(dev, t, power.suspend_timer);
        unsigned long flags;
        unsigned long expires;
 
@@ -1499,8 +1499,7 @@ void pm_runtime_init(struct device *dev)
        INIT_WORK(&dev->power.work, pm_runtime_work);
 
        dev->power.timer_expires = 0;
-       setup_timer(&dev->power.suspend_timer, pm_suspend_timer_fn,
-                       (unsigned long)dev);
+       timer_setup(&dev->power.suspend_timer, pm_suspend_timer_fn, 0);
 
        init_waitqueue_head(&dev->power.wait_queue);
 }
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index cdd6f256da59..680ee1d36ac9 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -54,7 +54,7 @@ static unsigned int saved_count;
 
 static DEFINE_SPINLOCK(events_lock);
 
-static void pm_wakeup_timer_fn(unsigned long data);
+static void pm_wakeup_timer_fn(struct timer_list *t);
 
 static LIST_HEAD(wakeup_sources);
 
@@ -176,7 +176,7 @@ void wakeup_source_add(struct wakeup_source *ws)
                return;
 
        spin_lock_init(&ws->lock);
-       setup_timer(&ws->timer, pm_wakeup_timer_fn, (unsigned long)ws);
+       timer_setup(&ws->timer, pm_wakeup_timer_fn, 0);
        ws->active = false;
        ws->last_time = ktime_get();
 
@@ -481,8 +481,7 @@ static bool wakeup_source_not_registered(struct 
wakeup_source *ws)
         * Use timer struct to check if the given source is initialized
         * by wakeup_source_add.
         */
-       return ws->timer.function != pm_wakeup_timer_fn ||
-                  ws->timer.data != (unsigned long)ws;
+       return ws->timer.function != (TIMER_FUNC_TYPE)pm_wakeup_timer_fn;
 }
 
 /*
@@ -724,9 +723,9 @@ EXPORT_SYMBOL_GPL(pm_relax);
  * in @data if it is currently active and its timer has not been canceled and
  * the expiration time of the timer is not in future.
  */
-static void pm_wakeup_timer_fn(unsigned long data)
+static void pm_wakeup_timer_fn(struct timer_list *t)
 {
-       struct wakeup_source *ws = (struct wakeup_source *)data;
+       struct wakeup_source *ws = from_timer(ws, t, timer);
        unsigned long flags;
 
        spin_lock_irqsave(&ws->lock, flags);
-- 
2.7.4


-- 
Kees Cook
Pixel Security