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Commit 1d822566 authored by Len Brown's avatar Len Brown
Browse files

m32r idle: delete pm_idle, and other dead idle code 



All paths on m32r lead to cpu_relax().
So delete the dead code and simply call cpu_relax() directly.

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
Cc: linux-m32r@ml.linux-m32r.org
parent 3e7fc708

arch/m32r/kernel/process.c

+2 −49
Original line number Diff line number Diff line
@@ -44,35 +44,9 @@ unsigned long thread_saved_pc(struct task_struct *tsk) 
	return tsk->thread.lr;

}



/*

 * Powermanagement idle function, if any..

 */

static void (*pm_idle)(void) = NULL;



void (*pm_power_off)(void) = NULL;

EXPORT_SYMBOL(pm_power_off);



/*

 * We use this is we don't have any better

 * idle routine..

 */

static void default_idle(void)

{

	/* M32R_FIXME: Please use "cpu_sleep" mode.  */

	cpu_relax();

}



/*

 * On SMP it's slightly faster (but much more power-consuming!)

 * to poll the ->work.need_resched flag instead of waiting for the

 * cross-CPU IPI to arrive. Use this option with caution.

 */

static void poll_idle (void)

{

	/* M32R_FIXME */

	cpu_relax();

}



/*

 * The idle thread. There's no useful work to be

 * done, so just try to conserve power and have a
@@ -84,14 +58,8 @@ void cpu_idle (void) 
	/* endless idle loop with no priority at all */

	while (1) {

		rcu_idle_enter();

		while (!need_resched()) {

			void (*idle)(void) = pm_idle;



			if (!idle)

				idle = default_idle;



			idle();

		}

		while (!need_resched())

			cpu_relax();

		rcu_idle_exit();

		schedule_preempt_disabled();

	}
@@ -120,21 +88,6 @@ void machine_power_off(void) 
	/* M32R_FIXME */

}



static int __init idle_setup (char *str)

{

	if (!strncmp(str, "poll", 4)) {

		printk("using poll in idle threads.\n");

		pm_idle = poll_idle;

	} else if (!strncmp(str, "sleep", 4)) {

		printk("using sleep in idle threads.\n");

		pm_idle = default_idle;

	}



	return 1;

}



__setup("idle=", idle_setup);



void show_regs(struct pt_regs * regs)

{

	printk("\n");