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timers: Remove the deprecated mod_timer_pinned() API 

We switched all users to initialize the timers as pinned and call
mod_timer(). Remove the now unused timer API function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Chris Mason <clm@fb.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: George Spelvin <linux@sciencehorizons.net>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160704094341.706205231@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Thomas Gleixner 2016-07-04 09:50:24 +00:00 committed by Ingo Molnar
parent f3438bc781
commit 177ec0a0a5
2 changed files with 5 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/timer.h
View File

@ -190,12 +190,9 @@ extern void add_timer_on(struct timer_list *timer, int cpu);
extern int del_timer(struct timer_list * timer);
extern int mod_timer(struct timer_list *timer, unsigned long expires);
extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
extern void set_timer_slack(struct timer_list *time, int slack_hz);
#define MOD_TIMER_NOT_PINNED 0
#define MOD_TIMER_PINNED 1
/*
* The jiffies value which is added to now, when there is no timer
* in the timer wheel:

39
kernel/time/timer.c
View File

@ -764,8 +764,7 @@ static struct tvec_base *lock_timer_base(struct timer_list *timer,
}
static inline int
__mod_timer(struct timer_list *timer, unsigned long expires,
bool pending_only, int pinned)
__mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only)
{
struct tvec_base *base, *new_base;
unsigned long flags;
@ -782,7 +781,7 @@ __mod_timer(struct timer_list *timer, unsigned long expires,
debug_activate(timer, expires);
new_base = get_target_base(base, pinned || timer->flags & TIMER_PINNED);
new_base = get_target_base(base, timer->flags & TIMER_PINNED);
if (base != new_base) {
/*
@ -825,7 +824,7 @@ out_unlock:
*/
int mod_timer_pending(struct timer_list *timer, unsigned long expires)
{
return __mod_timer(timer, expires, true, MOD_TIMER_NOT_PINNED);
return __mod_timer(timer, expires, true);
}
EXPORT_SYMBOL(mod_timer_pending);
@ -900,38 +899,10 @@ int mod_timer(struct timer_list *timer, unsigned long expires)
if (timer_pending(timer) && timer->expires == expires)
return 1;
return __mod_timer(timer, expires, false, MOD_TIMER_NOT_PINNED);
return __mod_timer(timer, expires, false);
}
EXPORT_SYMBOL(mod_timer);
/**
* mod_timer_pinned - modify a timer's timeout
* @timer: the timer to be modified
* @expires: new timeout in jiffies
*
* mod_timer_pinned() is a way to update the expire field of an
* active timer (if the timer is inactive it will be activated)
* and to ensure that the timer is scheduled on the current CPU.
*
* Note that this does not prevent the timer from being migrated
* when the current CPU goes offline. If this is a problem for
* you, use CPU-hotplug notifiers to handle it correctly, for
* example, cancelling the timer when the corresponding CPU goes
* offline.
*
* mod_timer_pinned(timer, expires) is equivalent to:
*
* del_timer(timer); timer->expires = expires; add_timer(timer);
*/
int mod_timer_pinned(struct timer_list *timer, unsigned long expires)
{
if (timer->expires == expires && timer_pending(timer))
return 1;
return __mod_timer(timer, expires, false, MOD_TIMER_PINNED);
}
EXPORT_SYMBOL(mod_timer_pinned);
/**
* add_timer - start a timer
* @timer: the timer to be added
@ -1512,7 +1483,7 @@ signed long __sched schedule_timeout(signed long timeout)
expire = timeout + jiffies;
setup_timer_on_stack(&timer, process_timeout, (unsigned long)current);
__mod_timer(&timer, expire, false, MOD_TIMER_NOT_PINNED);
__mod_timer(&timer, expire, false);
schedule();
del_singleshot_timer_sync(&timer);