linux/drivers/cpuidle
Thomas Gleixner b032bf70df ACPI/CPUIDLE: prevent setting pm_idle to NULL
pm_idle_save resp. pm_idle_old can be NULL when the restore code in
acpi_processor_cst_has_changed() resp. cpuidle_uninstall_idle_handler()
is called. This can set pm_idle unconditinally to NULL, which causes the
kernel to panic when calling pm_idle in the x86 idle code. This was
covered by an extra check for !pm_idle in the x86 idle code, which was
removed during the x86 idle code refactoring.

Instead of restoring the pm_idle check in the x86 code prevent the
acpi/cpuidle code to set pm_idle to NULL.

Reported by: Dhaval Giani http://lkml.org/lkml/2008/7/2/309
Based on a debug patch from Ingo Molnar

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-28 08:31:58 -07:00
..
governors pm qos infrastructure and interface 2008-02-05 09:44:22 -08:00
cpuidle.c ACPI/CPUIDLE: prevent setting pm_idle to NULL 2008-07-28 08:31:58 -07:00
cpuidle.h
driver.c
governor.c
Kconfig ACPI: CONFIG_CPU_IDLE=ACPI by default 2007-11-19 22:22:37 -05:00
Makefile
sysfs.c sysdev: Pass the attribute to the low level sysdev show/store function 2008-07-21 21:55:02 -07:00