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Arnd Bergmann fe8c470ab8 ACPI / power: Avoid maybe-uninitialized warning 
gcc -O2 cannot always prove that the loop in acpi_power_get_inferred_state()
is enterered at least once, so it assumes that cur_state might not get
initialized:

drivers/acpi/power.c: In function 'acpi_power_get_inferred_state':
drivers/acpi/power.c:222:9: error: 'cur_state' may be used uninitialized in this function [-Werror=maybe-uninitialized]

This sets the variable to zero at the start of the loop, to ensure that
there is well-defined behavior even for an empty list. This gets rid of
the warning.

The warning first showed up when the -Os flag got removed in a bug fix
patch in linux-4.11-rc5.

I would suggest merging this addon patch on top of that bug fix to avoid
introducing a new warning in the stable kernels.

Fixes: 61b79e16c68d (ACPI: Fix incompatibility with mcount-based function graph tracing)
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-04-19 22:46:10 +02:00
..
acpica
Revert "ACPICA: Resources: Not a valid resource if buffer length too long"
2017-04-13 18:23:46 +02:00
apei
ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal
2017-03-28 23:43:42 +02:00
arm64
arm64 updates for 4.11:
2017-02-22 10:46:44 -08:00
dptf
ACPI / platform: Add support for build-in properties
2016-11-10 00:30:29 +01:00
nfit
acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison)
2017-03-27 21:53:38 -07:00
pmic
ACPI / PMIC: remove modular references from non-modular code
2016-07-16 03:03:14 +02:00
ac.c
ACPI: Remove FSF mailing addresses
2015-07-08 02:27:32 +02:00
acpi_amba.c
ACPI / amba: Remove CLK_IS_ROOT
2016-04-27 23:42:57 +02:00
acpi_apd.c
Merge branches 'acpi-soc', 'acpi-battery', 'acpi-video', 'acpi-cppc' and 'acpi-apei'
2016-12-12 20:48:01 +01:00
acpi_cmos_rtc.c
char/genrtc: x86: remove remnants of asm/rtc.h
2016-06-04 00:20:07 +02:00
acpi_configfs.c
ACPI: Rename configfs.c to acpi_configfs.c to prevent link error
2016-07-11 15:13:36 +02:00
acpi_dbg.c
ACPI / debugger: Fix regression introduced by IS_ERR_VALUE() removal
2016-07-05 23:02:34 +02:00
acpi_extlog.c
x86/ras, EDAC, acpi: Assign MCE notifier handlers a priority
2017-01-24 09:14:57 +01:00
acpi_ipmi.c
acpi:ipmi: Make IPMI user handler const
2017-02-09 09:10:05 -06:00
acpi_lpat.c
ACPI / lpat: make it explicitly non-modular
2016-07-16 03:08:10 +02:00
acpi_lpss.c
pwm: Changes for v4.11-rc1
2017-03-01 09:46:02 -08:00
acpi_memhotplug.c
ACPI: Remove FSF mailing addresses
2015-07-08 02:27:32 +02:00
acpi_pad.c
sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>
2017-03-02 08:42:27 +01:00
acpi_platform.c
ACPI: Do not create a platform_device for IOAPIC/IOxAPIC
2017-03-28 23:37:19 +02:00
acpi_pnp.c
ACPI / PNP: constify device IDs
2016-01-04 22:10:30 +01:00
acpi_processor.c
acpi/processor: Check for duplicate processor ids at hotplug time
2017-03-11 14:41:20 +01:00
acpi_video.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
acpi_watchdog.c
ACPI / watchdog: Print out error number when device creation fails
2016-12-26 23:21:56 +01:00
battery.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
battery.h
ACPI / battery: move some ACPI_BATTERY_* definitions to header
2014-03-19 01:57:46 +01:00
bgrt.c
efi/x86: Move the EFI BGRT init code to early init code
2017-02-01 08:45:46 +01:00
blacklist.c
ACPI / blacklist: Make Dell Latitude 3350 ethernet work
2016-11-16 23:01:29 +01:00
bus.c
Revert "x86/acpi: Set persistent cpuid <-> nodeid mapping when booting"
2017-03-11 14:41:18 +01:00
button.c
ACPI / button: Remove lid_init_state=method mode
2017-01-31 17:20:45 +01:00
cm_sbs.c
ACPI: Remove FSF mailing addresses
2015-07-08 02:27:32 +02:00
container.c
ACPI: Remove FSF mailing addresses
2015-07-08 02:27:32 +02:00
cppc_acpi.c
ACPI / CPPC: Fix per-CPU pointer management in acpi_cppc_processor_probe()
2016-12-12 23:52:34 +01:00
custom_method.c
ACPI: Clean up inclusions of ACPI header files
2013-12-07 01:03:14 +01:00
debugfs.c
ACPI: fix acpi_debugfs_init prototype
2015-08-07 02:55:18 +02:00
device_pm.c
ACPI / PM: Export acpi_device_fix_up_power()
2016-05-20 15:54:01 +02:00
device_sysfs.c
ACPI / property: Hierarchical properties support update
2016-11-24 02:43:47 +01:00
dock.c
ACPI / dock: make dock explicitly non-modular
2016-07-16 03:08:08 +02:00
ec_sys.c
ACPI / EC: Deny write access unless requested by module param
2016-03-09 23:26:15 +01:00
ec.c
ACPI / EC: Use busy polling mode when GPE is not enabled
2017-01-30 12:12:52 +01:00
event.c
genetlink: mark families as __ro_after_init
2016-10-27 16:16:09 -04:00
evged.c
ACPI / GED: make evged.c explicitly non-modular
2016-05-09 22:59:25 +02:00
fan.c
ACPI / fan: Fix error reading cur_state
2016-10-10 02:20:43 +02:00
glue.c
ACPI / scan: Prefer devices without _HID for _ADR matching
2017-04-01 00:55:22 +02:00
hed.c
ACPI: Remove FSF mailing addresses
2015-07-08 02:27:32 +02:00
internal.h
x86/ioapic: Split IOAPIC hot-removal into two steps
2017-03-01 10:51:41 +01:00
ioapic.c
ACPI: ioapic: Clear on-stack resource before using it
2017-03-28 23:31:45 +02:00
irq.c
ACPI: Add support for ResourceSource/IRQ domain mapping
2017-02-03 15:03:48 +00:00
Kconfig
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2016-12-14 11:12:25 -08:00
Makefile
ACPI: Fix incompatibility with mcount-based function graph tracing
2017-03-28 23:54:43 +02:00
numa.c
ACPI/NUMA: Do not map pxm to node when NUMA is turned off
2016-12-15 11:32:32 +01:00
nvs.c
ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem.
2014-05-27 18:13:08 +02:00
osi.c
ACPI / osi: Collect _OSI handling into one single file
2016-05-05 00:13:53 +02:00
osl.c
ACPICA: Hardware: Add sleep register hooks
2017-01-02 23:18:41 +01:00
pci_irq.c
ACPI / PCI: fix GIC irq model default PCI IRQ polarity
2016-09-10 02:50:50 +02:00
pci_link.c
ACPI/PCI: pci_link: Include PIRQ_PENALTY_PCI_USING for ISA IRQs
2016-10-24 14:18:14 +02:00
pci_mcfg.c
PCI/ACPI: Fix bus range comparison in pci_mcfg_lookup()
2017-01-12 14:32:09 -06:00
pci_root.c
x86/ioapic: Split IOAPIC hot-removal into two steps
2017-03-01 10:51:41 +01:00
pci_slot.c
ACPI / PCI: make pci_slot explicitly non-modular
2016-07-16 03:05:29 +02:00
power.c
ACPI / power: Avoid maybe-uninitialized warning
2017-04-19 22:46:10 +02:00
proc.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
processor_core.c
Revert"x86/acpi: Enable MADT APIs to return disabled apicids"
2017-03-11 14:41:18 +01:00
processor_driver.c
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-10-03 19:43:08 -07:00
processor_idle.c
x86/amd: Simplify AMD E400 aware idle routine
2016-12-09 21:23:21 +01:00
processor_pdc.c
ACPI / processor: Introduce invalid_logical_cpuid()
2015-05-13 23:28:14 +02:00
processor_perflib.c
ACPI: processor_perflib: Simplify code and stop using CPUFREQ_START
2017-02-04 00:05:29 +01:00
processor_thermal.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
processor_throttling.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
property.c
ACPI / property: Hierarchical properties support update
2016-11-24 02:43:47 +01:00
reboot.c
…
resource.c
scripts/spelling.txt: add "overrided" pattern and fix typo instances
2017-02-27 18:43:47 -08:00
sbs.c
ACPI / SBS: fix inconsistent indenting inside if statement
2016-01-04 22:14:27 +01:00
sbshc.c
Revert "ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook"
2015-11-16 23:26:45 +01:00
sbshc.h
…
scan.c
ACPI / scan: Set the visited flag for all enumerated devices
2017-04-13 04:42:18 +02:00
sleep.c
ACPI: save NVS memory for Lenovo G50-45
2017-01-31 22:46:59 +01:00
sleep.h
ACPICA: Drop Linux-specific waking vector functions
2016-01-04 22:05:20 +01:00
spcr.c
tty: acpi/spcr: QDF2400 E44 checks for wrong OEM revision
2017-03-14 10:48:54 +08:00
sysfs.c
ACPI / sysfs: Provide quirk mechanism to prevent GPE flooding
2016-12-26 23:16:39 +01:00
tables.c
ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users
2016-12-21 02:36:38 +01:00
thermal.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
utils.c
nfit: make DIMM DSMs optional
2016-07-19 12:32:39 -07:00
video_detect.c
Revert "ACPI / video: Add force_native quirk for HP Pavilion dv6"
2017-01-25 14:04:13 +01:00
wakeup.c
ACPI: Clean up inclusions of ACPI header files
2013-12-07 01:03:14 +01:00