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Message-ID: <20240724144325.3307148-24-vschneid@redhat.com>
Date: Wed, 24 Jul 2024 16:43:23 +0200
From: Valentin Schneider <vschneid@...hat.com>
To: rcu@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Frederic Weisbecker <frederic@...nel.org>,
"Paul E. McKenney" <paulmck@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Neeraj Upadhyay <quic_neeraju@...cinc.com>,
Joel Fernandes <joel@...lfernandes.org>,
Josh Triplett <josh@...htriplett.org>,
Boqun Feng <boqun.feng@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Lai Jiangshan <jiangshanlai@...il.com>,
Zqiang <qiang.zhang1211@...il.com>
Subject: [PATCH v3 23/25] rcu: Rename rcu_momentary_dyntick_idle() into rcu_momentary_eqs()
The context_tracking.state RCU_DYNTICKS subvariable has been renamed to
RCU_WATCHING, replace "dyntick_idle" into "eqs" to drop the dyntick
reference.
Signed-off-by: Valentin Schneider <vschneid@...hat.com>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
---
include/linux/rcutiny.h | 2 +-
include/linux/rcutree.h | 2 +-
kernel/rcu/rcutorture.c | 4 ++--
kernel/rcu/tree.c | 4 ++--
kernel/rcu/tree_nocb.h | 2 +-
kernel/rcu/tree_plugin.h | 6 +++---
kernel/stop_machine.c | 2 +-
kernel/trace/trace_osnoise.c | 4 ++--
8 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index d9ac7b136aeab..cf2b5a188f783 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -158,7 +158,7 @@ void rcu_scheduler_starting(void);
static inline void rcu_end_inkernel_boot(void) { }
static inline bool rcu_inkernel_boot_has_ended(void) { return true; }
static inline bool rcu_is_watching(void) { return true; }
-static inline void rcu_momentary_dyntick_idle(void) { }
+static inline void rcu_momentary_eqs(void) { }
static inline void kfree_rcu_scheduler_running(void) { }
static inline bool rcu_gp_might_be_stalled(void) { return false; }
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 254244202ea97..7dbde2b6f714a 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -37,7 +37,7 @@ void synchronize_rcu_expedited(void);
void kvfree_call_rcu(struct rcu_head *head, void *ptr);
void rcu_barrier(void);
-void rcu_momentary_dyntick_idle(void);
+void rcu_momentary_eqs(void);
void kfree_rcu_scheduler_running(void);
bool rcu_gp_might_be_stalled(void);
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 08bf7c669dd3d..ef757c3e84a27 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -2680,7 +2680,7 @@ static unsigned long rcu_torture_fwd_prog_cbfree(struct rcu_fwd *rfp)
rcu_torture_fwd_prog_cond_resched(freed);
if (tick_nohz_full_enabled()) {
local_irq_save(flags);
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
local_irq_restore(flags);
}
}
@@ -2830,7 +2830,7 @@ static void rcu_torture_fwd_prog_cr(struct rcu_fwd *rfp)
rcu_torture_fwd_prog_cond_resched(n_launders + n_max_cbs);
if (tick_nohz_full_enabled()) {
local_irq_save(flags);
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
local_irq_restore(flags);
}
}
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 3c607e45532bd..2c9482b962a99 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -359,7 +359,7 @@ bool rcu_watching_zero_in_eqs(int cpu, int *vp)
*
* The caller must have disabled interrupts and must not be idle.
*/
-notrace void rcu_momentary_dyntick_idle(void)
+notrace void rcu_momentary_eqs(void)
{
int seq;
@@ -369,7 +369,7 @@ notrace void rcu_momentary_dyntick_idle(void)
WARN_ON_ONCE(!(seq & CT_RCU_WATCHING));
rcu_preempt_deferred_qs(current);
}
-EXPORT_SYMBOL_GPL(rcu_momentary_dyntick_idle);
+EXPORT_SYMBOL_GPL(rcu_momentary_eqs);
/**
* rcu_is_cpu_rrupt_from_idle - see if 'interrupted' from idle
diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h
index 3ce30841119ad..e629646ac6f52 100644
--- a/kernel/rcu/tree_nocb.h
+++ b/kernel/rcu/tree_nocb.h
@@ -917,7 +917,7 @@ static void nocb_cb_wait(struct rcu_data *rdp)
WARN_ON_ONCE(!rcu_rdp_is_offloaded(rdp));
local_irq_save(flags);
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
local_irq_restore(flags);
/*
* Disable BH to provide the expected environment. Also, when
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 51125f4130fd4..5fc7309187e1f 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -869,7 +869,7 @@ static void rcu_qs(void)
/*
* Register an urgently needed quiescent state. If there is an
- * emergency, invoke rcu_momentary_dyntick_idle() to do a heavy-weight
+ * emergency, invoke rcu_momentary_eqs() to do a heavy-weight
* dyntick-idle quiescent state visible to other CPUs, which will in
* some cases serve for expedited as well as normal grace periods.
* Either way, register a lightweight quiescent state.
@@ -889,7 +889,7 @@ void rcu_all_qs(void)
this_cpu_write(rcu_data.rcu_urgent_qs, false);
if (unlikely(raw_cpu_read(rcu_data.rcu_need_heavy_qs))) {
local_irq_save(flags);
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
local_irq_restore(flags);
}
rcu_qs();
@@ -909,7 +909,7 @@ void rcu_note_context_switch(bool preempt)
goto out;
this_cpu_write(rcu_data.rcu_urgent_qs, false);
if (unlikely(raw_cpu_read(rcu_data.rcu_need_heavy_qs)))
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
out:
rcu_tasks_qs(current, preempt);
trace_rcu_utilization(TPS("End context switch"));
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index cedb17ba158a9..da821ce258ea7 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -251,7 +251,7 @@ static int multi_cpu_stop(void *data)
*/
touch_nmi_watchdog();
}
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
} while (curstate != MULTI_STOP_EXIT);
local_irq_restore(flags);
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index a8e28f9b9271c..a41e8a8212647 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1535,7 +1535,7 @@ static int run_osnoise(void)
* This will eventually cause unwarranted noise as PREEMPT_RCU
* will force preemption as the means of ending the current
* grace period. We avoid this problem by calling
- * rcu_momentary_dyntick_idle(), which performs a zero duration
+ * rcu_momentary_eqs(), which performs a zero duration
* EQS allowing PREEMPT_RCU to end the current grace period.
* This call shouldn't be wrapped inside an RCU critical
* section.
@@ -1547,7 +1547,7 @@ static int run_osnoise(void)
if (!disable_irq)
local_irq_disable();
- rcu_momentary_dyntick_idle();
+ rcu_momentary_eqs();
if (!disable_irq)
local_irq_enable();
--
2.43.0
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