[patch 15/34] h8300: Use generic idle loop

Thomas Gleixner
2013-03-21T21:59:33Z

[-- Attachment #1: h8300-use-generic-idle-loop.patch --]
[-- Type: text/plain, Size: 1962 bytes --]

Use the core idle poll function instead of the private one

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
---
arch/h8300/Kconfig | 1 +
arch/h8300/kernel/process.c | 35 ++++-------------------------------
2 files changed, 5 insertions(+), 31 deletions(-)

Index: linux-2.6/arch/h8300/Kconfig
===================================================================
--- linux-2.6.orig/arch/h8300/Kconfig
+++ linux-2.6/arch/h8300/Kconfig
@@ -8,6 +8,7 @@ config H8300
select VIRT_TO_BUS
select ARCH_WANT_IPC_PARSE_VERSION
select GENERIC_IRQ_SHOW
+ select GENERIC_IDLE_LOOP
select GENERIC_CPU_DEVICES
select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3
Index: linux-2.6/arch/h8300/kernel/process.c
===================================================================
--- linux-2.6.orig/arch/h8300/kernel/process.c
+++ linux-2.6/arch/h8300/kernel/process.c
@@ -53,40 +53,13 @@ asmlinkage void ret_from_kernel_thread(v
* The idle loop on an H8/300..
*/
#if !defined(CONFIG_H8300H_SIM) && !defined(CONFIG_H8S_SIM)
-static void default_idle(void)
+void arch_cpu_idle(void)
{
- local_irq_disable();
- if (!need_resched()) {
- local_irq_enable();
- /* XXX: race here! What if need_resched() gets set now? */
- __asm__("sleep");
- } else
- local_irq_enable();
-}
-#else
-static void default_idle(void)
-{
- cpu_relax();
+ local_irq_enable();
+ /* XXX: race here! What if need_resched() gets set now? */
+ __asm__("sleep");
}
#endif
-void (*idle)(void) = default_idle;
-
-/*
- * 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
- * somebody to say that they'd like to reschedule)
- */
-void cpu_idle(void)
-{
- while (1) {
- rcu_idle_enter();
- while (!need_resched())
- idle();
- rcu_idle_exit();
- schedule_preempt_disabled();
- }
-}

void machine_restart(char * __unused)
{