[patch 11/34] bfin: Use generic idle loop

Thomas Gleixner
2013-03-21T22:00:26Z

[-- Attachment #1: bfin-use-generic-idle-loop.patch --]
[-- Type: text/plain, Size: 2661 bytes --]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Frysinger <vapier@gentoo.org>
---
arch/blackfin/Kconfig | 1 +
arch/blackfin/kernel/process.c | 30 ++----------------------------
arch/blackfin/mach-common/smp.c | 2 +-
3 files changed, 4 insertions(+), 29 deletions(-)

Index: linux-2.6/arch/blackfin/Kconfig
===================================================================
--- linux-2.6.orig/arch/blackfin/Kconfig
+++ linux-2.6/arch/blackfin/Kconfig
@@ -41,6 +41,7 @@ config BLACKFIN
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_NMI_WATCHDOG if NMI_WATCHDOG
select GENERIC_SMP_IDLE_THREAD
+ select GENERIC_IDLE_LOOP
select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
Index: linux-2.6/arch/blackfin/kernel/process.c
===================================================================
--- linux-2.6.orig/arch/blackfin/kernel/process.c
+++ linux-2.6/arch/blackfin/kernel/process.c
@@ -47,14 +47,14 @@ EXPORT_SYMBOL(pm_power_off);
*/
#ifdef CONFIG_IDLE_L1
static void default_idle(void)__attribute__((l1_text));
-void cpu_idle(void)__attribute__((l1_text));
+void arch_cpu_idle(void)__attribute__((l1_text));
#endif

/*
* This is our default idle handler. We need to disable
* interrupts here to ensure we don't miss a wakeup call.
*/
-static void default_idle(void)
+void arch_cpu_idle(void)
{
#ifdef CONFIG_IPIPE
ipipe_suspend_domain();
@@ -67,32 +67,6 @@ static void default_idle(void)
}

/*
- * The idle thread. We try to conserve power, while trying to keep
- * overall latency low. The architecture specific idle is passed
- * a value to indicate the level of "idleness" of the system.
- */
-void cpu_idle(void)
-{
- /* endless idle loop with no priority at all */
- while (1) {
-
-#ifdef CONFIG_HOTPLUG_CPU
- if (cpu_is_offline(smp_processor_id()))
- cpu_die();
-#endif
- tick_nohz_idle_enter();
- rcu_idle_enter();
- while (!need_resched())
- default_idle();
- rcu_idle_exit();
- tick_nohz_idle_exit();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
- }
-}
-
-/*
* Do necessary setup to start up a newly executed thread.
*
* pass the data segment into user programs if it exists,
Index: linux-2.6/arch/blackfin/mach-common/smp.c
===================================================================
--- linux-2.6.orig/arch/blackfin/mach-common/smp.c
+++ linux-2.6/arch/blackfin/mach-common/smp.c
@@ -335,7 +335,7 @@ void __cpuinit secondary_start_kernel(vo
*/
calibrate_delay();

- cpu_idle();
+ cpu_startup_entry(CPUHP_ONLINE);
}

void __init smp_prepare_boot_cpu(void)