Commit-ID: 33ee255196f8de7407012217e5fa7897555dd034
Gitweb: http://git.kernel.org/tip/33ee255196f8de7407012217e5fa7897555dd034
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sun, 22 Jun 2014 12:06:40 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sun, 22 Jun 2014 18:06:26 +0200
time/timers: Move all time(r) related files into kernel/time
Except for Kconfig.HZ. That needs a separate treatment.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
MAINTAINERS | 6 ++---
include/linux/hrtimer.h | 2 ++
kernel/Makefile | 25 +++---------------
kernel/time/Makefile | 17 +++++++++++++
kernel/{ => time}/hrtimer.c | 49 ++++++++++++++++++++----------------
kernel/{ => time}/itimer.c | 0
kernel/{ => time}/posix-cpu-timers.c | 0
kernel/{ => time}/posix-timers.c | 0
kernel/{ => time}/time.c | 0
kernel/{ => time}/timeconst.bc | 0
kernel/{ => time}/timer.c | 0
11 files changed, 53 insertions(+), 46 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 1b22565..970c4a0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4147,7 +4147,7 @@ L: linux-kernel@xxxxxxxxxxxxxxx
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
S: Maintained
F: Documentation/timers/
-F: kernel/hrtimer.c
+F: kernel/time/hrtimer.c
F: kernel/time/clockevents.c
F: kernel/time/tick*.*
F: kernel/time/timer_*.c
@@ -6945,10 +6945,10 @@ POSIX CLOCKS and TIMERS
M: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
L: linux-kernel@xxxxxxxxxxxxxxx
T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core
-S: Supported
+S: Maintained
F: fs/timerfd.c
F: include/linux/timer*
-F: kernel/*timer*
+F: kernel/time/*timer*
POWER SUPPLY CLASS/SUBSYSTEM and DRIVERS
M: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx>
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index e7a8d3f..bb4ffff 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -165,6 +165,7 @@ enum hrtimer_base_type {
* struct hrtimer_cpu_base - the per cpu clock bases
* @lock: lock protecting the base and associated clock bases
* and timers
+ * @cpu: cpu number
* @active_bases: Bitfield to mark bases with active timers
* @clock_was_set: Indicates that clock was set from irq context.
* @expires_next: absolute time of the next event which was scheduled
@@ -179,6 +180,7 @@ enum hrtimer_base_type {
*/
struct hrtimer_cpu_base {
raw_spinlock_t lock;
+ unsigned int cpu;
unsigned int active_bases;
unsigned int clock_was_set;
#ifdef CONFIG_HIGH_RES_TIMERS
diff --git a/kernel/Makefile b/kernel/Makefile
index f2a8b62..973a40c 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -3,12 +3,11 @@
#
obj-y = fork.o exec_domain.o panic.o \
- cpu.o exit.o itimer.o time.o softirq.o resource.o \
- sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
+ cpu.o exit.o softirq.o resource.o \
+ sysctl.o sysctl_binary.o capability.o ptrace.o user.o \
signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
- extable.o params.o posix-timers.o \
- kthread.o sys_ni.o posix-cpu-timers.o \
- hrtimer.o nsproxy.o \
+ extable.o params.o \
+ kthread.o sys_ni.o nsproxy.o \
notifier.o ksysfs.o cred.o reboot.o \
async.o range.o groups.o smpboot.o
@@ -110,22 +109,6 @@ targets += config_data.h
$(obj)/config_data.h: $(obj)/config_data.gz FORCE
$(call filechk,ikconfiggz)
-$(obj)/time.o: $(obj)/timeconst.h
-
-quiet_cmd_hzfile = HZFILE $@
- cmd_hzfile = echo "hz=$(CONFIG_HZ)" > $@
-
-targets += hz.bc
-$(obj)/hz.bc: $(objtree)/include/config/hz.h FORCE
- $(call if_changed,hzfile)
-
-quiet_cmd_bc = BC $@
- cmd_bc = bc -q $(filter-out FORCE,$^) > $@
-
-targets += timeconst.h
-$(obj)/timeconst.h: $(obj)/hz.bc $(src)/timeconst.bc FORCE
- $(call if_changed,bc)
-
###############################################################################
#
# Roll all the X.509 certificates that we can find together and pull them into
diff --git a/kernel/time/Makefile b/kernel/time/Makefile
index 57a413f..e59ce8b 100644
--- a/kernel/time/Makefile
+++ b/kernel/time/Makefile
@@ -1,3 +1,4 @@
+obj-y += time.o timer.o hrtimer.o itimer.o posix-timers.o posix-cpu-timers.o
obj-y += timekeeping.o ntp.o clocksource.o jiffies.o timer_list.o
obj-y += timeconv.o posix-clock.o alarmtimer.o
@@ -12,3 +13,19 @@ obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o
obj-$(CONFIG_TICK_ONESHOT) += tick-sched.o
obj-$(CONFIG_TIMER_STATS) += timer_stats.o
obj-$(CONFIG_DEBUG_FS) += timekeeping_debug.o
+
+$(obj)/time.o: $(obj)/timeconst.h
+
+quiet_cmd_hzfile = HZFILE $@
+ cmd_hzfile = echo "hz=$(CONFIG_HZ)" > $@
+
+targets += hz.bc
+$(obj)/hz.bc: $(objtree)/include/config/hz.h FORCE
+ $(call if_changed,hzfile)
+
+quiet_cmd_bc = BC $@
+ cmd_bc = bc -q $(filter-out FORCE,$^) > $@
+
+targets += timeconst.h
+$(obj)/timeconst.h: $(obj)/hz.bc $(src)/timeconst.bc FORCE
+ $(call if_changed,bc)
diff --git a/kernel/hrtimer.c b/kernel/time/hrtimer.c
similarity index 98%
rename from kernel/hrtimer.c
rename to kernel/time/hrtimer.c
index 3ab2899..8b3ea17 100644
--- a/kernel/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -602,6 +602,11 @@ hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base, int skip_equal)
* timers, we have to check, whether it expires earlier than the timer for
* which the clock event device was armed.
*
+ * Note, that in case the state has HRTIMER_STATE_CALLBACK set, no reprogramming
+ * and no expiry check happens. The timer gets enqueued into the rbtree. The
+ * reprogramming and expiry check is done in the hrtimer_interrupt or in the
+ * softirq.
+ *
* Called with interrupts disabled and base->cpu_base.lock held
*/
static int hrtimer_reprogram(struct hrtimer *timer,
@@ -662,18 +667,6 @@ static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base)
base->hres_active = 0;
}
-/*
- * When High resolution timers are active, try to reprogram. Note, that in case
- * the state has HRTIMER_STATE_CALLBACK set, no reprogramming and no expiry
- * check happens. The timer gets enqueued into the rbtree. The reprogramming
- * and expiry check is done in the hrtimer_interrupt or in the softirq.
- */
-static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
- struct hrtimer_clock_base *base)
-{
- return base->cpu_base->hres_active && hrtimer_reprogram(timer, base);
-}
-
static inline ktime_t hrtimer_update_base(struct hrtimer_cpu_base *base)
{
ktime_t *offs_real = &base->clock_base[HRTIMER_BASE_REALTIME].offset;
@@ -755,8 +748,8 @@ static inline int hrtimer_is_hres_enabled(void) { return 0; }
static inline int hrtimer_switch_to_hres(void) { return 0; }
static inline void
hrtimer_force_reprogram(struct hrtimer_cpu_base *base, int skip_equal) { }
-static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
- struct hrtimer_clock_base *base)
+static inline int hrtimer_reprogram(struct hrtimer *timer,
+ struct hrtimer_clock_base *base)
{
return 0;
}
@@ -1013,14 +1006,25 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
leftmost = enqueue_hrtimer(timer, new_base);
- /*
- * Only allow reprogramming if the new base is on this CPU.
- * (it might still be on another CPU if the timer was pending)
- *
- * XXX send_remote_softirq() ?
- */
- if (leftmost && new_base->cpu_base == &__get_cpu_var(hrtimer_bases)
- && hrtimer_enqueue_reprogram(timer, new_base)) {
+ if (!leftmost) {
+ unlock_hrtimer_base(timer, &flags);
+ return ret;
+ }
+
+ if (!hrtimer_is_hres_active(timer)) {
+ /*
+ * Kick to reschedule the next tick to handle the new timer
+ * on dynticks target.
+ */
+ wake_up_nohz_cpu(base->cpu_base->cpu);
+ } else if (new_base->cpu_base == &__get_cpu_var(hrtimer_bases) &&
+ hrtimer_reprogram(timer, new_base)) {
+ /*
+ * Only allow reprogramming if the new base is on this CPU.
+ * (it might still be on another CPU if the timer was pending)
+ *
+ * XXX send_remote_softirq() ?
+ */
if (wakeup) {
/*
* We need to drop cpu_base->lock to avoid a
@@ -1680,6 +1684,7 @@ static void init_hrtimers_cpu(int cpu)
timerqueue_init_head(&cpu_base->clock_base[i].active);
}
+ cpu_base->cpu = cpu;
hrtimer_init_hres(cpu_base);
}
diff --git a/kernel/itimer.c b/kernel/time/itimer.c
similarity index 100%
rename from kernel/itimer.c
rename to kernel/time/itimer.c
diff --git a/kernel/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
similarity index 100%
rename from kernel/posix-cpu-timers.c
rename to kernel/time/posix-cpu-timers.c
diff --git a/kernel/posix-timers.c b/kernel/time/posix-timers.c
similarity index 100%
rename from kernel/posix-timers.c
rename to kernel/time/posix-timers.c
diff --git a/kernel/time.c b/kernel/time/time.c
similarity index 100%
rename from kernel/time.c
rename to kernel/time/time.c
diff --git a/kernel/timeconst.bc b/kernel/time/timeconst.bc
similarity index 100%
rename from kernel/timeconst.bc
rename to kernel/time/timeconst.bc
diff --git a/kernel/timer.c b/kernel/time/timer.c
similarity index 100%
rename from kernel/timer.c
rename to kernel/time/timer.c
--
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