diff options
Diffstat (limited to 'arch/arm64/kernel/process.c')
| -rw-r--r-- | arch/arm64/kernel/process.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index de17c89985db..248a15db37f2 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -33,6 +33,7 @@ #include <linux/kallsyms.h> #include <linux/init.h> #include <linux/cpu.h> +#include <linux/cpuidle.h> #include <linux/elfcore.h> #include <linux/pm.h> #include <linux/tick.h> @@ -98,8 +99,10 @@ void arch_cpu_idle(void) * This should do all the clock switching and wait for interrupt * tricks */ - cpu_do_idle(); - local_irq_enable(); + if (cpuidle_idle_call()) { + cpu_do_idle(); + local_irq_enable(); + } } #ifdef CONFIG_HOTPLUG_CPU @@ -308,6 +311,7 @@ struct task_struct *__switch_to(struct task_struct *prev, unsigned long get_wchan(struct task_struct *p) { struct stackframe frame; + unsigned long stack_page; int count = 0; if (!p || p == current || p->state == TASK_RUNNING) return 0; @@ -315,9 +319,11 @@ unsigned long get_wchan(struct task_struct *p) frame.fp = thread_saved_fp(p); frame.sp = thread_saved_sp(p); frame.pc = thread_saved_pc(p); + stack_page = (unsigned long)task_stack_page(p); do { - int ret = unwind_frame(&frame); - if (ret < 0) + if (frame.sp < stack_page || + frame.sp >= stack_page + THREAD_SIZE || + unwind_frame(&frame)) return 0; if (!in_sched_functions(frame.pc)) return frame.pc; |