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authorLen Brown <len.brown@intel.com>2013-02-09 22:42:39 -0500
committerLen Brown <len.brown@intel.com>2013-02-17 23:37:06 -0500
commit1d8225661e2407241dbf16143180ff673668d6d7 (patch)
tree76d22affb6aff8e46ee13a46da5fbf064a0cde77
parent3e7fc708eb41f6385cf5cf64a68417a4be822be8 (diff)
downloadlinux-1d8225661e2407241dbf16143180ff673668d6d7.tar.bz2
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 <len.brown@intel.com> Cc: linux-m32r@ml.linux-m32r.org
-rw-r--r--arch/m32r/kernel/process.c51
1 files changed, 2 insertions, 49 deletions
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
@@ -44,36 +44,10 @@ 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
* low exit latency (ie sit in a loop waiting for
@@ -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");