nmi_backtrace: generate one-line reports for idle cpus

[cascardo/linux.git] / kernel / sched / idle.c

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 9fb873c..1d8718d 100644 (file)
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -16,6 +16,9 @@
 
 #include "sched.h"
 
+/* Linker adds these: start and end of __cpuidle functions */
+extern char __cpuidle_text_start[], __cpuidle_text_end[];
+
 /**
  * sched_idle_set_state - Record idle state for the current CPU.
  * @idle_state: State to record.
@@ -53,7 +56,7 @@ static int __init cpu_idle_nopoll_setup(char *__unused)
 __setup("hlt", cpu_idle_nopoll_setup);
 #endif
 
-static inline int cpu_idle_poll(void)
+static noinline int __cpuidle cpu_idle_poll(void)
 {
        rcu_idle_enter();
        trace_cpu_idle_rcuidle(0, smp_processor_id());
@@ -84,7 +87,7 @@ void __weak arch_cpu_idle(void)
  *
  * To use when the cpuidle framework cannot be used.
  */
-void default_idle_call(void)
+void __cpuidle default_idle_call(void)
 {
        if (current_clr_polling_and_test()) {
                local_irq_enable();
@@ -271,6 +274,12 @@ static void cpu_idle_loop(void)
        }
 }
 
+bool cpu_in_idle(unsigned long pc)
+{
+       return pc >= (unsigned long)__cpuidle_text_start &&
+               pc < (unsigned long)__cpuidle_text_end;
+}
+
 void cpu_startup_entry(enum cpuhp_state state)
 {
        /*