From 1d8225661e2407241dbf16143180ff673668d6d7 Mon Sep 17 00:00:00 2001 From: Len Brown Date: Sat, 9 Feb 2013 22:42:39 -0500 Subject: 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: Len Brown Cc: linux-m32r@ml.linux-m32r.org --- arch/m32r/kernel/process.c | 51 ++-------------------------------------------- 1 file changed, 2 insertions(+), 49 deletions(-) (limited to 'arch/m32r/kernel') diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c index 765d0f57c787..bde899e155d3 100644 --- a/arch/m32r/kernel/process.c +++ b/arch/m32r/kernel/process.c @@ -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"); -- cgit v1.2.3