Vaidyanathan Srinivasan 293d264f13 cpuidle: powernv: Pass correct drv->cpumask for registration ... drv->cpumask defaults to cpu_possible_mask in __cpuidle_driver_init(). On PowerNV platform cpu_present could be less than cpu_possible in cases where firmware detects the cpu, but it is not available to the OS. When CONFIG_HOTPLUG_CPU=n, such cpus are not hotplugable at runtime and hence we skip creating cpu_device. This breaks cpuidle on powernv where register_cpu() is not called for cpus in cpu_possible_mask that cannot be hot-added at runtime. Trying cpuidle_register_device() on cpu without cpu_device will cause crash like this: cpu 0xf: Vector: 380 (Data SLB Access) at [c000000ff1503490] pc: c00000000022c8bc: string+0x34/0x60 lr: c00000000022ed78: vsnprintf+0x284/0x42c sp: c000000ff1503710 msr: 9000000000009033 dar: 6000000060000000 current = 0xc000000ff1480000 paca = 0xc00000000fe82d00 softe: 0 irq_happened: 0x01 pid = 1, comm = swapper/8 Linux version 4.11.0-rc2 (sv@sagarika) (gcc version 4.9.4 (Buildroot 2017.02-00004-gc28573e) ) #15 SMP Fri Mar 17 19:32:02 IST 2017 enter ? for help [link register ] c00000000022ed78 vsnprintf+0x284/0x42c [c000000ff1503710] c00000000022ebb8 vsnprintf+0xc4/0x42c (unreliable) [c000000ff1503800] c00000000022ef40 vscnprintf+0x20/0x44 [c000000ff1503830] c0000000000ab61c vprintk_emit+0x94/0x2cc [c000000ff15038a0] c0000000000acc9c vprintk_func+0x60/0x74 [c000000ff15038c0] c000000000619694 printk+0x38/0x4c [c000000ff15038e0] c000000000224950 kobject_get+0x40/0x60 [c000000ff1503950] c00000000022507c kobject_add_internal+0x60/0x2c4 [c000000ff15039e0] c000000000225350 kobject_init_and_add+0x70/0x78 [c000000ff1503a60] c00000000053c288 cpuidle_add_sysfs+0x9c/0xe0 [c000000ff1503ae0] c00000000053aeac cpuidle_register_device+0xd4/0x12c [c000000ff1503b30] c00000000053b108 cpuidle_register+0x98/0xcc [c000000ff1503bc0] c00000000085eaf0 powernv_processor_idle_init+0x140/0x1e0 [c000000ff1503c60] c00000000000cd60 do_one_initcall+0xc0/0x15c [c000000ff1503d20] c000000000833e84 kernel_init_freeable+0x1a0/0x25c [c000000ff1503dc0] c00000000000d478 kernel_init+0x24/0x12c [c000000ff1503e30] c00000000000b564 ret_from_kernel_thread+0x5c/0x78 This patch fixes the bug by passing correct cpumask from powernv-cpuidle driver. Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> [ rjw: Comment massage ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2017-03-29 22:55:36 +02:00
..
governors	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-03 10:16:38 -08:00
coupled.c	cpuidle/coupled: Convert to hotplug state machine	2016-09-06 18:30:24 +02:00
cpuidle-arm.c	Merge branches 'pm-cpuidle', 'pm-opp' and 'pm-avs'	2016-10-02 01:43:16 +02:00
cpuidle-at91.c	drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver	2015-06-16 14:12:38 -04:00
cpuidle-big_little.c
cpuidle-calxeda.c	ARM: migrate to common PSCI client code	2015-08-03 15:38:39 +01:00
cpuidle-clps711x.c	drivers/cpuidle: make cpuidle-clps711x.c explicitly non-modular	2015-12-15 00:22:21 +01:00
cpuidle-cps.c	cpuidle: cpuidle-cps: Enable use with MIPSr6 CPUs.	2016-10-04 16:13:57 +02:00
cpuidle-exynos.c	drivers/cpuidle: make cpuidle-exynos.c explicitly non-modular	2015-12-15 00:22:22 +01:00
cpuidle-kirkwood.c
cpuidle-mvebu-v7.c	cpuidle: mvebu: disable the bind/unbind attributes and use builtin_platform_driver	2015-10-23 12:40:48 +02:00
cpuidle-powernv.c	cpuidle: powernv: Pass correct drv->cpumask for registration	2017-03-29 22:55:36 +02:00
cpuidle-pseries.c	cpuidle/pseries: Convert to hotplug state machine	2016-09-06 18:30:24 +02:00
cpuidle-ux500.c	drivers/cpuidle: make cpuidle-ux500.c explicitly non-modular	2015-12-15 00:22:22 +01:00
cpuidle-zynq.c	drivers/cpuidle: Convert non-modular drivers to use builtin_platform_driver	2015-06-16 14:12:38 -04:00
cpuidle.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
cpuidle.h	cpuidle/coupled: Add sanity check for safe_state_index	2015-09-03 03:05:47 +02:00
driver.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/idle.h>	2017-03-02 08:42:26 +01:00
dt_idle_states.c	cpuidle: dt: assign ->enter_freeze to same as ->enter callback function	2016-11-23 02:03:11 +01:00
dt_idle_states.h
governor.c	cpuidle: governors: Remove remaining old module code	2016-10-21 14:49:51 +02:00
Kconfig	cpuidle: Don't enable all governors by default	2016-01-15 22:39:58 +01:00
Kconfig.arm
Kconfig.mips	cpuidle: cpuidle-cps: Enable use with MIPSr6 CPUs.	2016-10-04 16:13:57 +02:00
Kconfig.powerpc
Makefile
sysfs.c	cpuidle: Validate cpu_dev in cpuidle_add_sysfs()	2017-03-21 22:26:37 +01:00