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Message-Id: <20190726185752.887468908@linutronix.de>
Date: Fri, 26 Jul 2019 20:30:50 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, Steven Rostedt <rostedt@...dmis.org>,
Sebastian Siewior <bigeasy@...utronix.de>,
Anna-Maria Gleixner <anna-maria@...utronix.de>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Jiri Olsa <jolsa@...hat.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Juergen Gross <jgross@...e.com>
Subject: [patch 02/12] hrtimer: Consolidate hrtimer_init() +
hrtimer_init_sleeper() calls
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
hrtimer_init_sleeper() calls require prior initialisation of the hrtimer
object which is embedded into the hrtimer_sleeper.
Combine the initialization and spare a function call. Fixup all call sites.
This is also a preparatory change for PREEMPT_RT to do hrtimer sleeper
specific initializations of the embedded hrtimer without modifying any of
the call sites.
No functional change.
[ anna-maria: Minor cleanups ]
[ tglx: Adopted to the removal of the task argument of
hrtimer_init_sleeper() and trivial polishing ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
v2..v3: Update to current version
v1..v2: Fix missing call site in drivers/staging/android/vsoc.c
block/blk-mq.c | 3 --
drivers/staging/android/vsoc.c | 6 +----
include/linux/hrtimer.h | 17 +++++++++++++---
include/linux/wait.h | 4 +--
kernel/futex.c | 8 ++-----
kernel/time/hrtimer.c | 43 ++++++++++++++++++++++++++++++-----------
net/core/pktgen.c | 4 ---
7 files changed, 55 insertions(+), 30 deletions(-)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3415,10 +3415,9 @@ static bool blk_mq_poll_hybrid_sleep(str
kt = nsecs;
mode = HRTIMER_MODE_REL;
- hrtimer_init_on_stack(&hs.timer, CLOCK_MONOTONIC, mode);
+ hrtimer_init_sleeper_on_stack(&hs, CLOCK_MONOTONIC, mode);
hrtimer_set_expires(&hs.timer, kt);
- hrtimer_init_sleeper(&hs);
do {
if (blk_mq_rq_state(rq) == MQ_RQ_COMPLETE)
break;
--- a/drivers/staging/android/vsoc.c
+++ b/drivers/staging/android/vsoc.c
@@ -437,12 +437,10 @@ static int handle_vsoc_cond_wait(struct
return -EINVAL;
wake_time = ktime_set(arg->wake_time_sec, arg->wake_time_nsec);
- hrtimer_init_on_stack(&to->timer, CLOCK_MONOTONIC,
- HRTIMER_MODE_ABS);
+ hrtimer_init_sleeper_on_stack(&to, CLOCK_MONOTONIC,
+ HRTIMER_MODE_ABS);
hrtimer_set_expires_range_ns(&to->timer, wake_time,
current->timer_slack_ns);
-
- hrtimer_init_sleeper(to);
}
while (1) {
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -347,10 +347,15 @@ DECLARE_PER_CPU(struct tick_device, tick
/* Initialize timers: */
extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock,
enum hrtimer_mode mode);
+extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, clockid_t clock_id,
+ enum hrtimer_mode mode);
#ifdef CONFIG_DEBUG_OBJECTS_TIMERS
extern void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t which_clock,
enum hrtimer_mode mode);
+extern void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
+ clockid_t clock_id,
+ enum hrtimer_mode mode);
extern void destroy_hrtimer_on_stack(struct hrtimer *timer);
#else
@@ -360,6 +365,14 @@ static inline void hrtimer_init_on_stack
{
hrtimer_init(timer, which_clock, mode);
}
+
+static inline void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
+ clockid_t clock_id,
+ enum hrtimer_mode mode)
+{
+ hrtimer_init_sleeper(sl, clock_id, mode);
+}
+
static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { }
#endif
@@ -463,10 +476,8 @@ extern long hrtimer_nanosleep(const stru
const enum hrtimer_mode mode,
const clockid_t clockid);
-extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl);
-
extern int schedule_hrtimeout_range(ktime_t *expires, u64 delta,
- const enum hrtimer_mode mode);
+ const enum hrtimer_mode mode);
extern int schedule_hrtimeout_range_clock(ktime_t *expires,
u64 delta,
const enum hrtimer_mode mode,
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -488,8 +488,8 @@ do { \
int __ret = 0; \
struct hrtimer_sleeper __t; \
\
- hrtimer_init_on_stack(&__t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); \
- hrtimer_init_sleeper(&__t); \
+ hrtimer_init_sleeper_on_stack(&__t, CLOCK_MONOTONIC, \
+ HRTIMER_MODE_REL); \
if ((timeout) != KTIME_MAX) \
hrtimer_start_range_ns(&__t.timer, timeout, \
current->timer_slack_ns, \
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -487,11 +487,9 @@ futex_setup_timer(ktime_t *time, struct
if (!time)
return NULL;
- hrtimer_init_on_stack(&timeout->timer, (flags & FLAGS_CLOCKRT) ?
- CLOCK_REALTIME : CLOCK_MONOTONIC,
- HRTIMER_MODE_ABS);
- hrtimer_init_sleeper(timeout);
-
+ hrtimer_init_sleeper_on_stack(timeout, (flags & FLAGS_CLOCKRT) ?
+ CLOCK_REALTIME : CLOCK_MONOTONIC,
+ HRTIMER_MODE_ABS);
/*
* If range_ns is 0, calling hrtimer_set_expires_range_ns() is
* effectively the same as calling hrtimer_set_expires().
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -427,6 +427,17 @@ void hrtimer_init_on_stack(struct hrtime
}
EXPORT_SYMBOL_GPL(hrtimer_init_on_stack);
+static void __hrtimer_init_sleeper(struct hrtimer_sleeper *sl,
+ clockid_t clock_id, enum hrtimer_mode mode);
+
+void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
+ clockid_t clock_id, enum hrtimer_mode mode)
+{
+ debug_object_init_on_stack(&sl->timer, &hrtimer_debug_descr);
+ __hrtimer_init_sleeper(sl, clock_id, mode);
+}
+EXPORT_SYMBOL_GPL(hrtimer_init_sleeper_on_stack);
+
void destroy_hrtimer_on_stack(struct hrtimer *timer)
{
debug_object_free(timer, &hrtimer_debug_descr);
@@ -1639,11 +1650,27 @@ static enum hrtimer_restart hrtimer_wake
return HRTIMER_NORESTART;
}
-void hrtimer_init_sleeper(struct hrtimer_sleeper *sl)
+static void __hrtimer_init_sleeper(struct hrtimer_sleeper *sl,
+ clockid_t clock_id, enum hrtimer_mode mode)
{
+ __hrtimer_init(&sl->timer, clock_id, mode);
sl->timer.function = hrtimer_wakeup;
sl->task = current;
}
+
+/**
+ * hrtimer_init_sleeper - initialize sleeper to the given clock
+ * @sl: sleeper to be initialized
+ * @clock_id: the clock to be used
+ * @mode: timer mode abs/rel
+ */
+void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, clockid_t clock_id,
+ enum hrtimer_mode mode)
+{
+ debug_init(&sl->timer, clock_id, mode);
+ __hrtimer_init_sleeper(sl, clock_id, mode);
+
+}
EXPORT_SYMBOL_GPL(hrtimer_init_sleeper);
int nanosleep_copyout(struct restart_block *restart, struct timespec64 *ts)
@@ -1669,8 +1696,6 @@ static int __sched do_nanosleep(struct h
{
struct restart_block *restart;
- hrtimer_init_sleeper(t);
-
do {
set_current_state(TASK_INTERRUPTIBLE);
hrtimer_start_expires(&t->timer, mode);
@@ -1707,10 +1732,9 @@ static long __sched hrtimer_nanosleep_re
struct hrtimer_sleeper t;
int ret;
- hrtimer_init_on_stack(&t.timer, restart->nanosleep.clockid,
- HRTIMER_MODE_ABS);
+ hrtimer_init_sleeper_on_stack(&t, restart->nanosleep.clockid,
+ HRTIMER_MODE_ABS);
hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires);
-
ret = do_nanosleep(&t, HRTIMER_MODE_ABS);
destroy_hrtimer_on_stack(&t.timer);
return ret;
@@ -1728,7 +1752,7 @@ long hrtimer_nanosleep(const struct time
if (dl_task(current) || rt_task(current))
slack = 0;
- hrtimer_init_on_stack(&t.timer, clockid, mode);
+ hrtimer_init_sleeper_on_stack(&t, clockid, mode);
hrtimer_set_expires_range_ns(&t.timer, timespec64_to_ktime(*rqtp), slack);
ret = do_nanosleep(&t, mode);
if (ret != -ERESTART_RESTARTBLOCK)
@@ -1927,11 +1951,8 @@ schedule_hrtimeout_range_clock(ktime_t *
return -EINTR;
}
- hrtimer_init_on_stack(&t.timer, clock_id, mode);
+ hrtimer_init_sleeper_on_stack(&t, clock_id, mode);
hrtimer_set_expires_range_ns(&t.timer, *expires, delta);
-
- hrtimer_init_sleeper(&t);
-
hrtimer_start_expires(&t.timer, mode);
if (likely(t.task))
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -2156,7 +2156,7 @@ static void spin(struct pktgen_dev *pkt_
s64 remaining;
struct hrtimer_sleeper t;
- hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
hrtimer_set_expires(&t.timer, spin_until);
remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
@@ -2170,8 +2170,6 @@ static void spin(struct pktgen_dev *pkt_
end_time = ktime_get();
} while (ktime_compare(end_time, spin_until) < 0);
} else {
- /* see do_nanosleep */
- hrtimer_init_sleeper(&t);
do {
set_current_state(TASK_INTERRUPTIBLE);
hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
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