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.

Cc: Andrew Morton <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Jeff Layton <[email protected]>
Cc: [email protected]
Signed-off-by: Kees Cook <[email protected]>
---
 mm/page-writeback.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 94854e243b11..65ba42c7c7da 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -628,9 +628,9 @@ EXPORT_SYMBOL_GPL(wb_writeout_inc);
  * On idle system, we can be called long after we scheduled because we use
  * deferred timers so count with missed periods.
  */
-static void writeout_period(unsigned long t)
+static void writeout_period(struct timer_list *t)
 {
-       struct wb_domain *dom = (void *)t;
+       struct wb_domain *dom = from_timer(dom, t, period_timer);
        int miss_periods = (jiffies - dom->period_time) /
                                                 VM_COMPLETIONS_PERIOD_LEN;
 
@@ -653,8 +653,7 @@ int wb_domain_init(struct wb_domain *dom, gfp_t gfp)
 
        spin_lock_init(&dom->lock);
 
-       setup_deferrable_timer(&dom->period_timer, writeout_period,
-                              (unsigned long)dom);
+       timer_setup(&dom->period_timer, writeout_period, TIMER_DEFERRABLE);
 
        dom->dirty_limit_tstamp = jiffies;
 
-- 
2.7.4


-- 
Kees Cook
Pixel Security

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