/*
* Check to see if the scheduling-clock interrupt came from an extended
* quiescent state, and, if so, tell RCU about it. This function must
* be called from hardirq context. It is normally called from the
* scheduling-clock interrupt.
*/
void rcu_check_callbacks(int user)
{
RCU_TRACE(check_cpu_stalls());
if (user || rcu_is_cpu_rrupt_from_idle()) {
rcu_sched_qs();
}
else if (!in_softirq()) {
rcu_bh_qs();
}
if (user) {
rcu_note_voluntary_context_switch(current);
}
}
/*
* Check to see if the scheduling-clock interrupt came from an extended
* quiescent state, and, if so, tell RCU about it. This function must
* be called from hardirq context. It is normally called from the
* scheduling-clock interrupt.
*/
void rcu_check_callbacks(int user)
{
RCU_TRACE(check_cpu_stalls());
mutant_covered = 1;
/* MUTANT (negate) */ if(! (user || rcu_is_cpu_rrupt_from_idle())) {
rcu_sched_qs();
}
else if (!in_softirq()) {
rcu_bh_qs();
}
if (user) {
rcu_note_voluntary_context_switch(current);
}
}
/*
* Check to see if the scheduling-clock interrupt came from an extended
* quiescent state, and, if so, tell RCU about it. This function must
* be called from hardirq context. It is normally called from the
* scheduling-clock interrupt.
*/
void rcu_check_callbacks(int user)
{
RCU_TRACE(check_cpu_stalls());
if (user || rcu_is_cpu_rrupt_from_idle()) {
if (!__covered11) {__covered11 = 1; total_covered += 1;}
rcu_sched_qs();
}
else if (!in_softirq()) {
if (!__covered12) {__covered12 = 1; total_covered += 1;}
rcu_bh_qs();
}
if (user) {
if (!__covered13) {__covered13 = 1; total_covered += 1;}
rcu_note_voluntary_context_switch(current);
}
}
/* Common code for rcu_idle_enter() and rcu_irq_exit(), see kernel/rcutree.c. */
static void rcu_idle_enter_common(long long oldval)
{
if (rcu_dynticks_nesting) {
RCU_TRACE(trace_rcu_dyntick("--=",
oldval, rcu_dynticks_nesting));
return;
}
RCU_TRACE(trace_rcu_dyntick("Start", oldval, rcu_dynticks_nesting));
if (!is_idle_task(current)) {
struct task_struct *idle = idle_task(smp_processor_id());
RCU_TRACE(trace_rcu_dyntick("Error on entry: not idle task",
oldval, rcu_dynticks_nesting));
ftrace_dump(DUMP_ALL);
WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",
current->pid, current->comm,
idle->pid, idle->comm); /* must be idle task! */
}
rcu_sched_qs(0); /* implies rcu_bh_qsctr_inc(0) */
}
/* Common code for rcu_idle_enter() and rcu_irq_exit(), see kernel/rcu/tree.c. */
static void rcu_idle_enter_common(long long newval)
{
if (newval) {
RCU_TRACE(trace_rcu_dyntick(TPS("--="),
rcu_dynticks_nesting, newval));
rcu_dynticks_nesting = newval;
return;
}
RCU_TRACE(trace_rcu_dyntick(TPS("Start"),
rcu_dynticks_nesting, newval));
if (IS_ENABLED(CONFIG_RCU_TRACE) && !is_idle_task(current)) {
struct task_struct *idle __maybe_unused = idle_task(smp_processor_id());
RCU_TRACE(trace_rcu_dyntick(TPS("Entry error: not idle task"),
rcu_dynticks_nesting, newval));
ftrace_dump(DUMP_ALL);
WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",
current->pid, current->comm,
idle->pid, idle->comm); /* must be idle task! */
}
rcu_sched_qs(); /* implies rcu_bh_inc() */
barrier();
rcu_dynticks_nesting = newval;
}
/*
* Enter dynticks-idle mode, which is an extended quiescent state
* if we have fully entered that mode (i.e., if the new value of
* dynticks_nesting is zero).
*/
void rcu_enter_nohz(void)
{
if (--rcu_dynticks_nesting == 0)
rcu_sched_qs(0); /* implies rcu_bh_qsctr_inc(0) */
}
void rcu_note_context_switch(int cpu)
{
rcu_sched_qs(cpu);
rcu_preempt_note_context_switch(cpu);
}
