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h8300: Use generic idle loop

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Use the core idle poll function instead of the private one

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: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20130321215234.277153345@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2013-03-21 22:49:45 +01:00
parent ccf8e78fe2
commit 0d24260c9e
2 changed files with 5 additions and 31 deletions
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1
arch/h8300/Kconfig
View file

@ -8,6 +8,7 @@ config H8300
select VIRT_TO_BUS select VIRT_TO_BUS
select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_IPC_PARSE_VERSION
select GENERIC_IRQ_SHOW select GENERIC_IRQ_SHOW
select GENERIC_IDLE_LOOP
select GENERIC_CPU_DEVICES select GENERIC_CPU_DEVICES
select MODULES_USE_ELF_RELA select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3 select OLD_SIGSUSPEND3

35
arch/h8300/kernel/process.c
View file

@ -53,40 +53,13 @@ asmlinkage void ret_from_kernel_thread(void);
* The idle loop on an H8/300.. * The idle loop on an H8/300..
*/ */
#if !defined(CONFIG_H8300H_SIM) && !defined(CONFIG_H8S_SIM) #if !defined(CONFIG_H8300H_SIM) && !defined(CONFIG_H8S_SIM)
static void default_idle(void) void arch_cpu_idle(void)
{ {
local_irq_disable(); local_irq_enable();
if (!need_resched()) { /* XXX: race here! What if need_resched() gets set now? */
local_irq_enable(); __asm__("sleep");
/* XXX: race here! What if need_resched() gets set now? */
__asm__("sleep");
} else
local_irq_enable();
}
#else
static void default_idle(void)
{
cpu_relax();
} }
#endif #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) void machine_restart(char * __unused)
{ {