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authorVenki Pallipadi <venkatesh.pallipadi@intel.com>2008-01-07 17:50:10 -0500
committerLen Brown <len.brown@intel.com>2008-01-07 17:50:10 -0500
commit5b3f0e6c1c9638b11a1063bf93c60a0766550b02 (patch)
tree21d685bb27cb5e42c1f9160dc15b75a6cd672084 /drivers/acpi/processor_idle.c
parent3ce54450461bad18bbe1f9f5aa3ecd2f8e8d1235 (diff)
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 <venkatesh.pallipadi@intel.com> Cc: Mark Lord <lkml@rtr.ca> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c4
1 files changed, 4 insertions, 0 deletions
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);