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metag: Use generic idle loop

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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: James Hogan <james.hogan@imgtec.com>
Link: http://lkml.kernel.org/r/20130321215234.606480852@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2013-03-21 22:49:50 +01:00
parent dfa174dcf8
commit d1dba0fcd3
3 changed files with 8 additions and 30 deletions
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1
arch/metag/Kconfig
View file

@ -7,6 +7,7 @@ config METAG
select EMBEDDED
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select GENERIC_IDLE_LOOP
select GENERIC_IRQ_SHOW
select GENERIC_SMP_IDLE_THREAD
select HAVE_64BIT_ALIGNED_ACCESS

35
arch/metag/kernel/process.c
View file

@ -22,6 +22,7 @@
#include <linux/pm.h>
#include <linux/syscalls.h>
#include <linux/uaccess.h>
#include <linux/smp.h>
#include <asm/core_reg.h>
#include <asm/user_gateway.h>
#include <asm/tcm.h>
@ -31,7 +32,7 @@
/*
* Wait for the next interrupt and enable local interrupts
*/
static inline void arch_idle(void)
void arch_cpu_idle(void)
{
int tmp;
@ -59,36 +60,12 @@ static inline void arch_idle(void)
: "r" (get_trigger_mask()));
}
void cpu_idle(void)
{
set_thread_flag(TIF_POLLING_NRFLAG);
while (1) {
tick_nohz_idle_enter();
rcu_idle_enter();
while (!need_resched()) {
/*
* We need to disable interrupts here to ensure we don't
* miss a wakeup call.
*/
local_irq_disable();
if (!need_resched()) {
#ifdef CONFIG_HOTPLUG_CPU
if (cpu_is_offline(smp_processor_id()))
cpu_die();
#endif
arch_idle();
} else {
local_irq_enable();
}
}
rcu_idle_exit();
tick_nohz_idle_exit();
schedule_preempt_disabled();
}
void arch_cpu_idle_dead(void)
{
cpu_die();
}
#endif
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);

2
arch/metag/kernel/smp.c
View file

@ -297,7 +297,7 @@ asmlinkage void secondary_start_kernel(void)
/*
* OK, it's off to the idle thread for us
*/
cpu_idle();
cpu_startup_entry(CPUHP_ONLINE);
}
void __init smp_cpus_done(unsigned int max_cpus)