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Message-Id: <74528e8abf2bb96e8bee85ffacbf14e15cf89f0d.1730386209.git.namcao@linutronix.de>
Date: Thu, 31 Oct 2024 16:14:15 +0100
From: Nam Cao <namcao@...utronix.de>
To: Anna-Maria Behnsen <anna-maria@...utronix.de>,
Frederic Weisbecker <frederic@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Andreas Hindborg <a.hindborg@...nel.org>,
Alice Ryhl <aliceryhl@...gle.com>,
Miguel Ojeda <ojeda@...nel.org>,
Kees Cook <kees@...nel.org>,
linux-kernel@...r.kernel.org
Cc: Jani Nikula <jani.nikula@...ux.intel.com>,
intel-gfx@...ts.freedesktop.org,
Sean Christopherson <seanjc@...gle.com>,
Paolo Bonzini <pbonzini@...hat.com>,
x86@...nel.org,
Jakub Kicinski <kuba@...nel.org>,
Kalle Valo <kvalo@...nel.org>,
Jens Axboe <axboe@...nel.dk>,
Christian Brauner <brauner@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
John Stultz <jstultz@...gle.com>,
Nam Cao <namcao@...utronix.de>,
Oliver Hartkopp <socketcan@...tkopp.net>
Subject: [RESEND PATCH v2 01/19] hrtimers: Add missing hrtimer_init() trace points
hrtimer_init*_on_stack() is not covered by tracing when
CONFIG_DEBUG_OBJECTS_TIMERS=y.
Rework the functions similar to hrtimer_init() and hrtimer_init_sleeper()
so that the hrtimer_init() tracepoint is unconditionally available.
The rework makes hrtimer_init_sleeper() unused. Delete it.
Signed-off-by: Nam Cao <namcao@...utronix.de>
---
include/linux/hrtimer.h | 19 +-----------
kernel/time/hrtimer.c | 65 +++++++++++++++++++++++------------------
2 files changed, 37 insertions(+), 47 deletions(-)
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index aa1e65ccb615..5aa9d57528c4 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -228,32 +228,15 @@ static inline void hrtimer_cancel_wait_running(struct hrtimer *timer)
/* 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);
+#ifdef CONFIG_DEBUG_OBJECTS_TIMERS
extern void destroy_hrtimer_on_stack(struct hrtimer *timer);
#else
-static inline void hrtimer_init_on_stack(struct hrtimer *timer,
- clockid_t which_clock,
- enum hrtimer_mode mode)
-{
- 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
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 04f7d8a392c3..4b0507cf38ea 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -417,6 +417,11 @@ static inline void debug_hrtimer_init(struct hrtimer *timer)
debug_object_init(timer, &hrtimer_debug_descr);
}
+static inline void debug_hrtimer_init_on_stack(struct hrtimer *timer)
+{
+ debug_object_init_on_stack(timer, &hrtimer_debug_descr);
+}
+
static inline void debug_hrtimer_activate(struct hrtimer *timer,
enum hrtimer_mode mode)
{
@@ -428,28 +433,6 @@ static inline void debug_hrtimer_deactivate(struct hrtimer *timer)
debug_object_deactivate(timer, &hrtimer_debug_descr);
}
-static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
- enum hrtimer_mode mode);
-
-void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t clock_id,
- enum hrtimer_mode mode)
-{
- debug_object_init_on_stack(timer, &hrtimer_debug_descr);
- __hrtimer_init(timer, clock_id, mode);
-}
-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);
@@ -459,6 +442,7 @@ EXPORT_SYMBOL_GPL(destroy_hrtimer_on_stack);
#else
static inline void debug_hrtimer_init(struct hrtimer *timer) { }
+static inline void debug_hrtimer_init_on_stack(struct hrtimer *timer) { }
static inline void debug_hrtimer_activate(struct hrtimer *timer,
enum hrtimer_mode mode) { }
static inline void debug_hrtimer_deactivate(struct hrtimer *timer) { }
@@ -472,6 +456,13 @@ debug_init(struct hrtimer *timer, clockid_t clockid,
trace_hrtimer_init(timer, clockid, mode);
}
+static inline void debug_init_on_stack(struct hrtimer *timer, clockid_t clockid,
+ enum hrtimer_mode mode)
+{
+ debug_hrtimer_init_on_stack(timer);
+ trace_hrtimer_init(timer, clockid, mode);
+}
+
static inline void debug_activate(struct hrtimer *timer,
enum hrtimer_mode mode)
{
@@ -1600,6 +1591,23 @@ void hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
}
EXPORT_SYMBOL_GPL(hrtimer_init);
+/**
+ * hrtimer_init_on_stack - initialize a timer in stack memory
+ * @timer: The timer to be initialized
+ * @clock_id: The clock to be used
+ * @mode: The timer mode
+ *
+ * Similar to hrtimer_init(), except that this one must be used if struct hrtimer is in stack
+ * memory.
+ */
+void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t clock_id,
+ enum hrtimer_mode mode)
+{
+ debug_init_on_stack(timer, clock_id, mode);
+ __hrtimer_init(timer, clock_id, mode);
+}
+EXPORT_SYMBOL_GPL(hrtimer_init_on_stack);
+
/*
* A timer is active, when it is enqueued into the rbtree or the
* callback function is running or it's in the state of being migrated
@@ -1944,7 +1952,7 @@ void hrtimer_sleeper_start_expires(struct hrtimer_sleeper *sl,
* Make the enqueue delivery mode check work on RT. If the sleeper
* was initialized for hard interrupt delivery, force the mode bit.
* This is a special case for hrtimer_sleepers because
- * hrtimer_init_sleeper() determines the delivery mode on RT so the
+ * __hrtimer_init_sleeper() determines the delivery mode on RT so the
* fiddling with this decision is avoided at the call sites.
*/
if (IS_ENABLED(CONFIG_PREEMPT_RT) && sl->timer.is_hard)
@@ -1987,19 +1995,18 @@ static void __hrtimer_init_sleeper(struct hrtimer_sleeper *sl,
}
/**
- * hrtimer_init_sleeper - initialize sleeper to the given clock
+ * hrtimer_init_sleeper_on_stack - initialize a sleeper in stack memory
* @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)
+void hrtimer_init_sleeper_on_stack(struct hrtimer_sleeper *sl,
+ clockid_t clock_id, enum hrtimer_mode mode)
{
- debug_init(&sl->timer, clock_id, mode);
+ debug_init_on_stack(&sl->timer, clock_id, mode);
__hrtimer_init_sleeper(sl, clock_id, mode);
-
}
-EXPORT_SYMBOL_GPL(hrtimer_init_sleeper);
+EXPORT_SYMBOL_GPL(hrtimer_init_sleeper_on_stack);
int nanosleep_copyout(struct restart_block *restart, struct timespec64 *ts)
{
--
2.39.5
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