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Hugh Dickins 4302fbc8ec panic: panic=-1 for immediate reboot 
When a kernel BUG or oops occurs, ChromeOS intends to panic and
immediately reboot, with stacktrace and other messages preserved in RAM
across reboot.

But the longer we delay, the more likely the user is to poweroff and
lose the info.

panic_timeout (seconds before rebooting) is set by panic= boot option or
sysctl or /proc/sys/kernel/panic; but 0 means wait forever, so at
present we have to delay at least 1 second.

Let a negative number mean reboot immediately (with the small cosmetic
benefit of suppressing that newline-less "Rebooting in %d seconds.."
message).

Signed-off-by: Hugh Dickins <hughd@chromium.org>
Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Olaf Hering <olaf@aepfle.de>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Dave Airlie <airlied@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:45 -07:00
..
ABI Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2011-07-25 23:08:32 -07:00
accounting Documentation: update cgroupfs mount point 2011-06-15 21:52:50 -07:00
acpi ACPI: Split out custom_method functionality into an own driver 2011-05-29 01:50:40 -04:00
aoe
arm Merge branch 'next/deletion' of git+ssh://master.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc 2011-07-25 12:43:28 -07:00
auxdisplay
blackfin Blackfin: spi-docs: further clarify GPIO CS behavior with various modes 2011-07-23 01:18:35 -04:00
block block: strict rq_affinity 2011-07-23 20:44:25 +02:00
blockdev doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
cdrom
cgroups memcg: add memory.vmscan_stat 2011-07-26 16:49:42 -07:00
connector
console
cpu-freq doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
cpuidle
cris
crypto
development-process sched: Generalize sleep inside spinlock detection 2011-06-23 00:44:38 +02:00
device-mapper
devicetree Merge branch 'x86-olpc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-26 11:11:54 -07:00
DocBook Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-07-25 13:56:39 -07:00
driver-model DOCUMENTATION: Replace create_device() with device_create(). 2011-06-07 10:04:22 -07:00
dvb
early-userspace
fault-injection
fb DRM: clean up and document parsing of video= parameter 2011-07-25 12:02:26 +01:00
filesystems Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 2011-07-26 11:34:40 -07:00
firmware_class
frv
hid
hwmon hwmon: (lm78) Become the maintainer 2011-07-25 21:46:11 +02:00
i2c i2c-i801: SMBus patch for Intel Panther Point DeviceIDs 2011-05-24 20:58:49 +02:00
i2o doc: i2o: fix typo 'Settting' 2011-06-07 16:06:01 +02:00
ia64
ide
infiniband
input Input: elantech - describe further the protocol 2011-05-16 22:48:24 -07:00
ioctl drivers/virt: introduce Freescale hypervisor management driver 2011-07-08 00:21:27 -05:00
isdn doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
ja_JP Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-07-25 23:06:24 -07:00
kbuild doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
kdump
ko_KR
laptops thinkpad-acpi: handle HKEY 0x4010, 0x4011 events 2011-07-07 10:39:05 -04:00
leds
m68k
make
mips
misc-devices
mmc mmc: documentation of mmc non-blocking request usage and design. 2011-07-21 10:34:52 -04:00
mn10300
mtd
namespaces
netlabel
networking stmmac: improve and up-to-date the documentation 2011-07-21 15:29:16 -07:00
nfc
parisc
PCI
pcmcia
power Merge branch 'pm-runtime' into for-linus 2011-07-15 23:59:25 +02:00
powerpc
pps
prctl
pti Kernel documentation for the PTI feature. 2011-05-13 16:31:00 -07:00
ptp ptp: Added a brand new class driver for ptp clocks. 2011-05-23 13:01:00 -07:00
rapidio
RCU doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
s390 [S390] remove tape block docu 2011-07-24 10:48:22 +02:00
scheduler Merge branch 'master' into for-next 2011-07-11 14:15:55 +02:00
scsi doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
security Create Documentation/security/, 2011-05-19 15:59:38 -07:00
serial doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
sh
sound ALSA: hda - Add documentation for codec-specific mixer controls 2011-07-19 09:34:10 +02:00
sparc
spi spi/pxa2xx: Remove unavailable ssp_type from documentation 2011-06-18 22:36:30 -06:00
sysctl ipc: introduce shm_rmid_forced sysctl 2011-07-26 16:49:44 -07:00
target
telephony
thermal
timers doc: timers-howto: fix a typo ("unsgined") 2011-05-17 10:52:02 +02:00
trace tracing/kprobes: Support module init function probing 2011-07-15 15:17:14 -04:00
usb Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2011-07-25 23:08:32 -07:00
vDSO Document the vDSO and add a reference parser 2011-07-14 17:57:09 -07:00
video4linux [media] uvcvideo: Add driver documentation 2011-05-20 09:30:36 -03:00
virtual Merge branch 'kvm-updates/3.1' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2011-07-24 09:07:03 -07:00
vm Documentation: update cgroupfs mount point 2011-06-15 21:52:50 -07:00
w1
watchdog
wimax
x86 Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 17:05:15 -07:00
zh_CN Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-07-25 23:06:24 -07:00
.gitignore
00-INDEX Merge branch 'docs-security' into docs-move 2011-05-20 09:10:04 -07:00
applying-patches.txt
atomic_ops.txt Documentation/atomic_ops.txt: avoid volatile in sample code 2011-05-26 17:12:34 -07:00
bad_memory.txt
basic_profiling.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt mm: convert mm->cpu_vm_cpumask into cpumask_var_t 2011-05-25 08:39:21 -07:00
Changes Documentation/Changes: remove some really obsolete text 2011-07-11 16:48:38 -07:00
circular-buffers.txt
coccinelle.txt
CodingStyle Documentation: update CodingStyle memory allocators 2011-07-06 13:17:51 -07:00
cpu-hotplug.txt
cpu-load.txt
cputopology.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt
DMA-API-HOWTO.txt Documentation/DMA-API-HOWTO.txt: fix misleading example 2011-07-26 16:49:45 -07:00
DMA-API.txt
DMA-attributes.txt
DMA-ISA-LPC.txt
dmaengine.txt dmaengine: Add API documentation for slave dma usage 2011-05-25 14:49:20 -07:00
dontdiff Documentation: update dontdiff file 2011-05-23 15:14:11 -07:00
dynamic-debug-howto.txt
edac.txt
eisa.txt
email-clients.txt
feature-removal-schedule.txt include/linux/dma-mapping.h: remove DMA_xxBIT_MASK macros 2011-07-26 16:49:45 -07:00
flexible-arrays.txt flex_array: flex_array_prealloc takes a number of elements, not an end 2011-04-28 16:12:47 -04:00
futex-requeue-pi.txt
gcov.txt
gpio.txt
highuid.txt
HOWTO Documentation: update LXR web link 2011-05-23 15:14:11 -07:00
hw_random.txt
hwspinlock.txt
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt
IRQ-affinity.txt bitmap, irq: add smp_affinity_list interface to /proc/irq 2011-05-25 08:39:45 -07:00
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt
kernel-docs.txt
kernel-parameters.txt panic: panic=-1 for immediate reboot 2011-07-26 16:49:45 -07:00
kmemcheck.txt
kmemleak.txt Documentation: update kmemleak supported archs 2011-06-15 21:52:50 -07:00
kobject.txt
kprobes.txt
kref.txt
ldm.txt
local_ops.txt
lockdep-design.txt
lockstat.txt Documentation: Add statistics about nested locks 2011-05-28 17:03:29 +02:00
logo.gif
logo.txt
magic-number.txt doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
Makefile
ManagementStyle
mca.txt doc: fix wrong arch/i386 references 2011-06-13 13:43:05 +02:00
md.txt md:Documentation/md.txt - fix typo 2011-06-09 11:43:04 +10:00
media-framework.txt
memory-barriers.txt
memory-hotplug.txt
memory.txt
mono.txt
mutex-design.txt
nmi_watchdog.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
pi-futex.txt
pnp.txt
preempt-locking.txt
printk-formats.txt Documentation: update printk-formats.txt 2011-06-15 21:52:50 -07:00
prio_tree.txt
rbtree.txt Documentation: Update augmented rbtree documentation 2011-07-24 10:03:05 -07:00
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rt-mutex-design.txt
rt-mutex.txt
rtc.txt
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
SM501.txt
sparse.txt
spinlocks.txt Documentation/spinlocks.txt: Remove reference to sti()/cli() 2011-07-11 12:45:04 -07:00
stable_api_nonsense.txt
stable_kernel_rules.txt
SubmitChecklist Documentation/SubmitChecklist: add RCU debug config options 2011-07-25 20:57:17 -07:00
SubmittingDrivers
SubmittingPatches Documentation: update GregKH links 2011-05-23 15:14:11 -07:00
svga.txt
sysfs-rules.txt
sysrq.txt
unaligned-memory-access.txt
unicode.txt
unshare.txt
VGA-softcursor.txt
vgaarbiter.txt Documentation: fix vgaarbiter.txt typos etc. 2011-05-23 15:14:11 -07:00
video-output.txt
volatile-considered-harmful.txt
workqueue.txt
xz.txt
zorro.txt