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rcu: Rename rcu_momentary_dyntick_idle() into rcu_momentary_eqs()

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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@redhat.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>
This commit is contained in:
Valentin Schneider 2024-04-29 16:43:36 +02:00 committed by Neeraj Upadhyay
parent 3b18eb3f9f
commit 32a9f26e5e
8 changed files with 13 additions and 13 deletions
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2
include/linux/rcutiny.h
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@ -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; }

2
include/linux/rcutree.h
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@ -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);

4
kernel/rcu/rcutorture.c
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@ -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);
}
}

4
kernel/rcu/tree.c
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@ -367,7 +367,7 @@ 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;
@ -377,7 +377,7 @@ 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

2
kernel/rcu/tree_nocb.h
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@ -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

6
kernel/rcu/tree_plugin.h
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@ -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"));

2
kernel/stop_machine.c
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@ -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);

4
kernel/trace/trace_osnoise.c
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@ -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();