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| author | Thomas Gleixner <tglx@linutronix.de> | 2013-03-21 22:49:39 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2013-04-08 17:39:24 +0200 |
| commit | 0087298f68a726493a637c4f68d148b31102b0d9 (patch) | |
| tree | a9430ea8eda75f336bebc92b90a2572bce9fc0f2 | |
| parent | arm: Use generic idle loop (diff) | |
| download | linux-0087298f68a726493a637c4f68d148b31102b0d9.tar.xz linux-0087298f68a726493a637c4f68d148b31102b0d9.zip | |
arm64: 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>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: http://lkml.kernel.org/r/20130321215233.887563095@linutronix.de
| -rw-r--r-- | arch/arm64/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/process.c | 43 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 2 |
3 files changed, 7 insertions, 39 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 9b6d19f74078..ca2c871795c5 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -9,6 +9,7 @@ config ARM64 select CLONE_BACKWARDS select COMMON_CLK select GENERIC_CLOCKEVENTS + select GENERIC_IDLE_LOOP select GENERIC_IOMAP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 0337cdb0667b..83a0ad5936a5 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -84,11 +84,15 @@ EXPORT_SYMBOL_GPL(pm_power_off); void (*pm_restart)(const char *cmd); EXPORT_SYMBOL_GPL(pm_restart); +void arch_cpu_idle_prepare(void) +{ + local_fiq_enable(); +} /* * This is our default idle handler. */ -static void default_idle(void) +void arch_cpu_idle(void) { /* * This should do all the clock switching and wait for interrupt @@ -98,43 +102,6 @@ static void default_idle(void) local_irq_enable(); } -/* - * The idle thread. - * We always respect 'hlt_counter' to prevent low power idle. - */ -void cpu_idle(void) -{ - local_fiq_enable(); - - /* endless idle loop with no priority at all */ - 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()) { - stop_critical_timings(); - default_idle(); - start_critical_timings(); - /* - * default_idle functions should always return - * with IRQs enabled. - */ - WARN_ON(irqs_disabled()); - } else { - local_irq_enable(); - } - } - rcu_idle_exit(); - tick_nohz_idle_exit(); - schedule_preempt_disabled(); - } -} - void machine_shutdown(void) { #ifdef CONFIG_SMP diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index bdd34597254b..261445c4666f 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -216,7 +216,7 @@ asmlinkage void __cpuinit 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) |