From 01426478df3a8791ff5c8b6b82d409e699cfaf38 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 21 Mar 2013 22:49:40 +0100 Subject: avr32: Use generic idle loop Also replace the idle poll enforcement by the generic functionality. Signed-off-by: Thomas Gleixner Cc: Linus Torvalds Cc: Rusty Russell Cc: Paul McKenney Cc: Peter Zijlstra Reviewed-by: Cc: Srivatsa S. Bhat Cc: Magnus Damm Cc: Hans-Christian Egtvedt Link: http://lkml.kernel.org/r/20130321215233.950290809@linutronix.de Signed-off-by: Thomas Gleixner --- arch/avr32/Kconfig | 1 + arch/avr32/kernel/process.c | 13 ++----------- arch/avr32/kernel/time.c | 9 +++++++-- arch/avr32/mach-at32ap/include/mach/pm.h | 24 ------------------------ arch/avr32/mach-at32ap/pm-at32ap700x.S | 7 ------- 5 files changed, 10 insertions(+), 44 deletions(-) (limited to 'arch/avr32') diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig index c1a868d398b..bbecda4c337 100644 --- a/arch/avr32/Kconfig +++ b/arch/avr32/Kconfig @@ -10,6 +10,7 @@ config AVR32 select VIRT_TO_BUS select GENERIC_IRQ_PROBE select GENERIC_ATOMIC64 + select GENERIC_IDLE_LOOP select HARDIRQS_SW_RESEND select GENERIC_IRQ_SHOW select ARCH_HAVE_CUSTOM_GPIO_H diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c index fd78f58ea79..073c3c2fa52 100644 --- a/arch/avr32/kernel/process.c +++ b/arch/avr32/kernel/process.c @@ -30,18 +30,9 @@ EXPORT_SYMBOL(pm_power_off); * This file handles the architecture-dependent parts of process handling.. */ -void cpu_idle(void) +void arch_cpu_idle(void) { - /* endless idle loop with no priority at all */ - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - while (!need_resched()) - cpu_idle_sleep(); - rcu_idle_exit(); - tick_nohz_idle_exit(); - schedule_preempt_disabled(); - } + cpu_enter_idle(); } void machine_halt(void) diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c index 05ad29112ff..869a1c6ffee 100644 --- a/arch/avr32/kernel/time.c +++ b/arch/avr32/kernel/time.c @@ -12,6 +12,7 @@ #include #include #include +#include #include @@ -87,13 +88,17 @@ static void comparator_mode(enum clock_event_mode mode, pr_debug("%s: start\n", evdev->name); /* FALLTHROUGH */ case CLOCK_EVT_MODE_RESUME: - cpu_disable_idle_sleep(); + /* + * If we're using the COUNT and COMPARE registers we + * need to force idle poll. + */ + cpu_idle_poll_ctrl(true); break; case CLOCK_EVT_MODE_UNUSED: case CLOCK_EVT_MODE_SHUTDOWN: sysreg_write(COMPARE, 0); pr_debug("%s: stop\n", evdev->name); - cpu_enable_idle_sleep(); + cpu_idle_poll_ctrl(false); break; default: BUG(); diff --git a/arch/avr32/mach-at32ap/include/mach/pm.h b/arch/avr32/mach-at32ap/include/mach/pm.h index 979b355b77b..f29ff2cd23d 100644 --- a/arch/avr32/mach-at32ap/include/mach/pm.h +++ b/arch/avr32/mach-at32ap/include/mach/pm.h @@ -21,30 +21,6 @@ extern void cpu_enter_idle(void); extern void cpu_enter_standby(unsigned long sdramc_base); -extern bool disable_idle_sleep; - -static inline void cpu_disable_idle_sleep(void) -{ - disable_idle_sleep = true; -} - -static inline void cpu_enable_idle_sleep(void) -{ - disable_idle_sleep = false; -} - -static inline void cpu_idle_sleep(void) -{ - /* - * If we're using the COUNT and COMPARE registers for - * timekeeping, we can't use the IDLE state. - */ - if (disable_idle_sleep) - cpu_relax(); - else - cpu_enter_idle(); -} - void intc_set_suspend_handler(unsigned long offset); #endif diff --git a/arch/avr32/mach-at32ap/pm-at32ap700x.S b/arch/avr32/mach-at32ap/pm-at32ap700x.S index f868f4ce761..1c8e4e6bff0 100644 --- a/arch/avr32/mach-at32ap/pm-at32ap700x.S +++ b/arch/avr32/mach-at32ap/pm-at32ap700x.S @@ -18,13 +18,6 @@ /* Same as 0xfff00000 but fits in a 21 bit signed immediate */ #define PM_BASE -0x100000 - .section .bss, "wa", @nobits - .global disable_idle_sleep - .type disable_idle_sleep, @object -disable_idle_sleep: - .int 4 - .size disable_idle_sleep, . - disable_idle_sleep - /* Keep this close to the irq handlers */ .section .irq.text, "ax", @progbits -- cgit v1.2.3