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Message-Id: <6320995cb955d3ec1d8b8cbc935303f91218bb4a.1729864615.git.namcao@linutronix.de>
Date: Mon, 28 Oct 2024 08:29:20 +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: Nam Cao <namcao@...utronix.de>
Subject: [PATCH 01/21] hrtimers: Add missing hrtimer_init event trace points
There is the "hrtimer_init" trace event when hrtimer gets initialized. This
event should also be triggered in hrtimer_init_on_stack() and
hrtimer_init_sleeper_on_stack(), which is not the case if
CONFIG_DEBUG_OBJECTS_TIMERS=y.
Make sure the "hrtimer_init" trace event is triggered properly by
introducing debug_init_on_stack() which is analogous to debug_init() and
call this function in hrtimer_init_on_stack() and
hrtimer_init_sleeper_on_stack(). These two functions now each have a single
implementation regardless of CONFIG_DEBUG_OBJECTS_TIMERS, similar to
hrtimer_init() and hrtimer_init_sleeper().
Signed-off-by: Nam Cao <namcao@...utronix.de>
---
include/linux/hrtimer.h | 17 +----------
kernel/time/hrtimer.c | 66 +++++++++++++++++++++++++++--------------
2 files changed, 45 insertions(+), 38 deletions(-)
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index aa1e65ccb615..814d489cb7a2 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -230,30 +230,15 @@ 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..533769777ba4 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
@@ -2001,6 +2009,20 @@ void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, clockid_t clock_id,
}
EXPORT_SYMBOL_GPL(hrtimer_init_sleeper);
+/**
+ * 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_on_stack(struct hrtimer_sleeper *sl,
+ clockid_t clock_id, enum hrtimer_mode mode)
+{
+ debug_init_on_stack(&sl->timer, clock_id, mode);
+ __hrtimer_init_sleeper(sl, clock_id, mode);
+}
+EXPORT_SYMBOL_GPL(hrtimer_init_sleeper_on_stack);
+
int nanosleep_copyout(struct restart_block *restart, struct timespec64 *ts)
{
switch(restart->nanosleep.type) {
--
2.39.5
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