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bfin: Use generic idle loop 

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Link: http://lkml.kernel.org/r/20130321215234.014923303@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2013-03-21 22:49:41 +01:00
parent 01426478df
commit 25d67f860f
3 changed files with 8 additions and 27 deletions
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1
arch/blackfin/Kconfig
View File

@ -41,6 +41,7 @@ config BLACKFIN
select USE_GENERIC_SMP_HELPERS if SMP select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_NMI_WATCHDOG if NMI_WATCHDOG select HAVE_NMI_WATCHDOG if NMI_WATCHDOG
select GENERIC_SMP_IDLE_THREAD select GENERIC_SMP_IDLE_THREAD
select GENERIC_IDLE_LOOP
select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA select MODULES_USE_ELF_RELA

32
arch/blackfin/kernel/process.c
View File

@ -46,15 +46,14 @@ EXPORT_SYMBOL(pm_power_off);
* The idle loop on BFIN * The idle loop on BFIN
*/ */
#ifdef CONFIG_IDLE_L1 #ifdef CONFIG_IDLE_L1
static void default_idle(void)__attribute__((l1_text)); void arch_cpu_idle(void)__attribute__((l1_text));
void cpu_idle(void)__attribute__((l1_text));
#endif #endif
/* /*
* This is our default idle handler. We need to disable * This is our default idle handler. We need to disable
* interrupts here to ensure we don't miss a wakeup call. * interrupts here to ensure we don't miss a wakeup call.
*/ */
static void default_idle(void) void arch_cpu_idle(void)
{ {
#ifdef CONFIG_IPIPE #ifdef CONFIG_IPIPE
ipipe_suspend_domain(); ipipe_suspend_domain();
@ -66,31 +65,12 @@ static void default_idle(void)
hard_local_irq_enable(); hard_local_irq_enable();
} }
/* #ufdef CONFIG_HOTPLUG_CPU
* The idle thread. We try to conserve power, while trying to keep void arch_cpu_idle_dead(void)
* 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 */ cpu_die();
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();
}
} }
#endif
/* /*
* Do necessary setup to start up a newly executed thread. * Do necessary setup to start up a newly executed thread.

2
arch/blackfin/mach-common/smp.c
View File

@ -335,7 +335,7 @@ void __cpuinit secondary_start_kernel(void)
*/ */
calibrate_delay(); calibrate_delay();
cpu_idle(); cpu_startup_entry(CPUHP_ONLINE);
} }
void __init smp_prepare_boot_cpu(void) void __init smp_prepare_boot_cpu(void)