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Subject[tip:timers/core] posix-cpu-timers: Remove private interval storage
Commit-ID:  16118794ede91aac1a73abe15de22d3de9d2b775
Gitweb: https://git.kernel.org/tip/16118794ede91aac1a73abe15de22d3de9d2b775
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Fri, 11 Jan 2019 14:33:17 +0100
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Tue, 15 Jan 2019 16:36:13 +0100

posix-cpu-timers: Remove private interval storage

Posix CPU timers store the interval in private storage for historical
reasons (it_interval used to be a non scalar representation on 32bit
systems). This is gone and there is no reason for duplicated storage
anymore.

Use it_interval everywhere.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "H.J. Lu" <hjl.tools@gmail.com>
Link: https://lkml.kernel.org/r/20190111133500.945255655@linutronix.de

---
include/linux/posix-timers.h | 2 +-
kernel/time/posix-cpu-timers.c | 13 ++++++-------
2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index e96581ca7c9d..b20798fc5191 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -12,7 +12,7 @@ struct siginfo;

struct cpu_timer_list {
struct list_head entry;
- u64 expires, incr;
+ u64 expires;
struct task_struct *task;
int firing;
};
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index 80f955210861..0a426f4e3125 100644
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -67,13 +67,13 @@ static void bump_cpu_timer(struct k_itimer *timer, u64 now)
int i;
u64 delta, incr;

- if (timer->it.cpu.incr == 0)
+ if (!timer->it_interval)
return;

if (now < timer->it.cpu.expires)
return;

- incr = timer->it.cpu.incr;
+ incr = timer->it_interval;
delta = now + incr - timer->it.cpu.expires;

/* Don't use (incr*2 < delta), incr*2 might overflow. */
@@ -520,7 +520,7 @@ static void cpu_timer_fire(struct k_itimer *timer)
*/
wake_up_process(timer->it_process);
timer->it.cpu.expires = 0;
- } else if (timer->it.cpu.incr == 0) {
+ } else if (!timer->it_interval) {
/*
* One-shot timer. Clear it as soon as it's fired.
*/
@@ -606,7 +606,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags,
*/

ret = 0;
- old_incr = timer->it.cpu.incr;
+ old_incr = timer->it_interval;
old_expires = timer->it.cpu.expires;
if (unlikely(timer->it.cpu.firing)) {
timer->it.cpu.firing = -1;
@@ -684,8 +684,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags,
* Install the new reload setting, and
* set up the signal and overrun bookkeeping.
*/
- timer->it.cpu.incr = timespec64_to_ns(&new->it_interval);
- timer->it_interval = ns_to_ktime(timer->it.cpu.incr);
+ timer->it_interval = timespec64_to_ktime(new->it_interval);

/*
* This acts as a modification timestamp for the timer,
@@ -724,7 +723,7 @@ static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec64 *itp
/*
* Easy part: convert the reload time.
*/
- itp->it_interval = ns_to_timespec64(timer->it.cpu.incr);
+ itp->it_interval = ktime_to_timespec64(timer->it_interval);

if (!timer->it.cpu.expires)
return;
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