From 707827f3387d9b260d50fa697885a4042cea3bf4 Mon Sep 17 00:00:00 2001 From: Deepthi Dharwar Date: Wed, 30 Nov 2011 02:46:42 +0000 Subject: powerpc/cpuidle: cpuidle driver for pSeries This patch implements a back-end cpuidle driver for pSeries based on pseries_dedicated_idle_loop and pseries_shared_idle_loop routines. The driver is built only if CONFIG_CPU_IDLE is set. This cpuidle driver uses global registration of idle states and not per-cpu. Signed-off-by: Deepthi Dharwar Signed-off-by: Trinabh Gupta Signed-off-by: Arun R Bharadwaj Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/system.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/system.h b/arch/powerpc/include/asm/system.h index ff6668038799..f56a0a75d989 100644 --- a/arch/powerpc/include/asm/system.h +++ b/arch/powerpc/include/asm/system.h @@ -223,6 +223,14 @@ extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask); extern int powersave_nap; /* set if nap mode can be used in idle loop */ void cpu_idle_wait(void); +#ifdef CONFIG_PSERIES_IDLE +extern void update_smt_snooze_delay(int snooze); +extern int pseries_notify_cpuidle_add_cpu(int cpu); +#else +static inline void update_smt_snooze_delay(int snooze) {} +static inline int pseries_notify_cpuidle_add_cpu(int cpu) { return 0; } +#endif + /* * Atomic exchange * -- cgit v1.2.3