From a6869cc4cfd633d909918f1489a6a8ac668cd6aa Mon Sep 17 00:00:00 2001 From: Venki Pallipadi Date: Fri, 8 Feb 2008 17:05:44 -0800 Subject: [PATCH] cpuidle: build fix for non-x86 The last posted version of this patch gave compile error on IA64. So, here goes yet another rewrite of the patch. Convert cpu_idle_wait() to cpuidle_kick_cpus() which is SMP-only, and gives error on non supported CPU. Changes from last patch sent by Kevin: Moved the definition of kick_cpus back to cpuidle.c from cpuidle.h: * Having it in .h gives #error on archs which includes the header file without actually having CPU_IDLE configured. To make it work in .h, we need one more #ifdef around that code which makes it messy. * Also, the function is only called from one file. So, it can be in declared statically in .c rather than making it available to everyone who includes the .h file. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Kevin Hilman Signed-off-by: Len Brown --- arch/x86/Kconfig | 3 +++ drivers/cpuidle/cpuidle.c | 13 ++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 65a70b777c12..a64d532dff4c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -102,6 +102,9 @@ config ARCH_HAS_ILOG2_U32 config ARCH_HAS_ILOG2_U64 def_bool n +config ARCH_HAS_CPU_IDLE_WAIT + def_bool y + config GENERIC_CALIBRATE_DELAY def_bool y diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 2c4b2d47973e..60f71e6345e3 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -27,6 +27,17 @@ static void (*pm_idle_old)(void); static int enabled_devices; +#if defined(CONFIG_ARCH_HAS_CPU_IDLE_WAIT) +static void cpuidle_kick_cpus(void) +{ + cpu_idle_wait(); +} +#elif defined(CONFIG_SMP) +# error "Arch needs cpu_idle_wait() equivalent here" +#else /* !CONFIG_ARCH_HAS_CPU_IDLE_WAIT && !CONFIG_SMP */ +static void cpuidle_kick_cpus(void) {} +#endif + /** * cpuidle_idle_call - the main idle loop * @@ -83,7 +94,7 @@ void cpuidle_uninstall_idle_handler(void) { if (enabled_devices && (pm_idle != pm_idle_old)) { pm_idle = pm_idle_old; - cpu_idle_wait(); + cpuidle_kick_cpus(); } } -- GitLab