From 5b3f0e6c1c9638b11a1063bf93c60a0766550b02 Mon Sep 17 00:00:00 2001 From: Venki Pallipadi Date: Mon, 7 Jan 2008 17:50:10 -0500 Subject: [PATCH] ACPI: Reintroduce run time configurable max_cstate for !CPU_IDLE case This was writeable in 2.6.23 but the cpuidle merge made it read-only. But some people's scripts (ie: Mark's) were writing to it. As an unhappy compromise, make max_cstate writeable again if the kernel was configured without CONFIG_CPU_IDLE. http://bugzilla.kernel.org/show_bug.cgi?id=9683 Signed-off-by: Venkatesh Pallipadi Cc: Mark Lord Cc: Arjan van de Ven Cc: Ingo Molnar Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/acpi/processor_idle.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 2fe34cc73c13..2235f4e02d26 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -76,7 +76,11 @@ static void (*pm_idle_save) (void) __read_mostly; #define PM_TIMER_TICKS_TO_US(p) (((p) * 1000)/(PM_TIMER_FREQUENCY/1000)) static unsigned int max_cstate __read_mostly = ACPI_PROCESSOR_MAX_POWER; +#ifdef CONFIG_CPU_IDLE module_param(max_cstate, uint, 0000); +#else +module_param(max_cstate, uint, 0644); +#endif static unsigned int nocst __read_mostly; module_param(nocst, uint, 0000);