Neil Horman d6580a9f15 kexec: sysrq: simplify sysrq-c handler ... Currently the sysrq-c handler is bit over-engineered. Its behavior is dependent on a few compile time and run time factors that alter its behavior which is really unnecessecary. If CONFIG_KEXEC is not configured, sysrq-c, crashes the system with a NULL pointer dereference. If CONFIG_KEXEC is configured, it calls crash_kexec directly, which implies that the kexec kernel will either be booted (if its been previously loaded), or it will simply do nothing (the no kexec kernel has been loaded). It would be much easier to just simplify the whole thing to dereference a NULL pointer all the time regardless of configuration. That way, it will always try to crash the system, and if a kexec kernel has been loaded into reserved space, it will still boot from the page fault trap handler (assuming panic_on_oops is set appropriately). [akpm@linux-foundation.org: build fix] Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: Brayan Arraes <brayan@yack.com.br> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-06-18 13:03:59 -07:00
..
agp	[IA64] Convert ia64 to use int-ll64.h	2009-06-17 09:33:49 -07:00
hw_random	MIPS: hwrng: Add TX4939 RNG driver	2009-06-17 11:06:27 +01:00
ip2	tty: rewrite the ldisc locking	2009-06-11 08:51:01 -07:00
ipmi	ipmi: remove driver_data direct access of struct device	2009-06-15 21:30:27 -07:00
mwave	mwave: struct device - replace bus_id with dev_name(), dev_set_name()	2009-01-06 10:44:38 -08:00
pcmcia	tty: Add carrier processing on close to the tty_port core	2009-06-11 08:50:56 -07:00
rio	rio: addition has higher precedence than ?:	2009-04-06 14:36:43 -07:00
tpm	TPM: get_event_name stack corruption	2009-05-20 08:30:05 +10:00
xilinx_hwicap	xilinx_hwicap: remove improper wording in license statement	2008-12-17 11:23:07 -08:00
.gitignore
amiserial.c	trivial: typo (en|dis|avail|remove)bale -> (en|dis|avail|remove)able	2009-06-12 18:01:45 +02:00
apm-emulation.c	APM emulation: Notify about all suspend events, not just APM invoked ones (v2)	2008-07-16 23:27:02 +02:00
applicom.c	applicom: Auto-load applicom module when device opened.	2009-04-06 14:36:30 -07:00
applicom.h
bfin-otp.c	Blackfin char driver for Blackfin on-chip OTP memory (v3)	2008-04-25 08:04:56 +08:00
bfin_jtag_comm.c	tty: bfin_jtag_comm: emulate a TTY over the Blackfin EMUDAT/JTAG interface	2009-06-11 08:51:06 -07:00
briq_panel.c	briq_panel: BKL pushdown	2008-06-20 14:05:55 -06:00
bsr.c	trivial: drivers/char/bsr.c: Storage class should be before const qualifier	2009-03-30 15:22:02 +02:00
cd1865.h
ChangeLog
consolemap.c	consolemap: indentation & braces disagree - reindent	2009-01-06 15:59:30 -08:00
cp437.uni	unicode table for cp437	2008-12-13 11:25:49 -08:00
cs5535_gpio.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
cyclades.c	tty: rewrite the ldisc locking	2009-06-11 08:51:01 -07:00
defkeymap.c_shipped	Fix default compose table initialization	2008-03-03 14:53:16 -08:00
defkeymap.map
digi1.h
digiFep1.h
digiPCI.h
ds1302.c	rtc: use bcd2bin/bin2bcd	2008-10-20 08:52:41 -07:00
ds1620.c	[ARM] netwinder: clean up GPIO naming	2008-12-13 09:12:07 +00:00
dsp56k.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
dtlk.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
efirtc.c	drivers/char/efirtc.c: removed duplicated #include	2008-08-04 16:59:56 -07:00
epca.c	tty: rewrite the ldisc locking	2009-06-11 08:51:01 -07:00
epca.h	epca: use tty_port	2008-07-20 17:12:36 -07:00
epcaconfig.h
esp.c	esp: fix section mismatch warning	2009-04-07 08:31:03 -07:00
generic_nvram.c	driver/char/generic_nvram: fix banner	2008-06-12 18:05:41 -07:00
generic_serial.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
genrtc.c	genrtc: BKL pushdown	2008-06-20 14:05:57 -06:00
hangcheck-timer.c	drivers/char/: Spelling fixes	2008-02-03 17:11:42 +02:00
hpet.c	irq: change ACPI GSI APIs to also take a device argument	2009-04-28 12:21:17 +02:00
hvc_beat.c	powerpc/cell: Use correct types in beat files	2009-01-08 16:25:16 +11:00
hvc_console.c	hvc_console: Remove tty->low_latency	2009-01-16 16:15:16 +11:00
hvc_console.h	powerpc: Make open count variables signed in hvcs/hvsi/hvc_console	2008-12-03 21:04:13 +11:00
hvc_irq.c	hvc_console: Call free_irq() only if request_irq() was successful	2009-01-13 14:48:01 +11:00
hvc_iseries.c	drivers/hvc: Add missing of_node_put	2008-12-03 21:04:09 +11:00
hvc_iucv.c	[S390] pm: hvc_iucv power management callbacks	2009-06-16 10:31:19 +02:00
hvc_rtas.c	[POWERPC] hvc_rtas_init() must be __init	2008-02-14 22:11:02 +11:00
hvc_udbg.c	powerpc: udbg-based backend for hvc_console	2008-11-19 16:04:25 +11:00
hvc_vio.c	drivers/hvc: Add missing of_node_put	2008-12-03 21:04:09 +11:00
hvc_xen.c	hvc_console: Add a hangup notifier for backends	2008-10-22 10:59:54 +11:00
hvcs.c	hvcs: remove driver_data direct access of struct device	2009-06-15 21:30:27 -07:00
hvsi.c	hvc_console: Remove tty->low_latency on pseries backends	2009-03-11 10:44:26 +11:00
i8k.c	i8k: Add Dell Vostro systems	2009-01-02 10:28:32 -08:00
isicom.c	Char: isicom: fix build warning	2009-06-18 13:03:54 -07:00
istallion.c	tty: Add carrier processing on close to the tty_port core	2009-06-11 08:50:56 -07:00
Kconfig	drivers/char/rtc: disable legacy RTC driver on Blackfin systems	2009-06-18 13:03:43 -07:00
keyboard.c	Input: keyboard - fix potential out of bound access to key_map	2008-10-08 23:45:36 -04:00
lp.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
Makefile	tty: bfin_jtag_comm: emulate a TTY over the Blackfin EMUDAT/JTAG interface	2009-06-11 08:51:06 -07:00
mbcs.c	mbcs: cdev lock_kernel() pushdown	2008-06-20 14:05:48 -06:00
mbcs.h	MBCS: convert dmareadlock to mutex	2008-02-07 08:42:25 -08:00
mem.c	drivers/char/mem.c: memory_open() cleanup: lookup minor device number from devlist	2009-06-18 13:03:54 -07:00
misc.c	Driver Core: misc: add nodename support for misc devices.	2009-06-15 21:30:25 -07:00
mmtimer.c	mmtimer: Push BKL down into the ioctl handler	2008-07-17 11:34:49 -07:00
moxa.c	moxa: prevent opening unavailable ports	2009-06-11 08:51:09 -07:00
moxa.h	Char: moxa, cleanup rx/tx	2008-04-30 08:29:43 -07:00
mspec.c	mspec: convert nopfn to fault	2008-07-24 10:47:14 -07:00
mxser.c	tty: Add carrier processing on close to the tty_port core	2009-06-11 08:50:56 -07:00
mxser.h	mxser: convert large macros to functions	2008-04-30 08:29:49 -07:00
n_hdlc.c	tty: rewrite the ldisc locking	2009-06-11 08:51:01 -07:00
n_r3964.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
n_tty.c	tty: simplify buffer allocator cleanups	2009-06-11 08:51:02 -07:00
nozomi.c	tty: kref nozomi	2009-01-02 10:19:40 -08:00
nsc_gpio.c
nvram.c	[PATCH] nvram - convert PRINT_PROC to seq_file	2008-11-11 09:56:00 +00:00
nwbutton.c
nwbutton.h
nwflash.c	[ARM] netwinder: clean up GPIO naming	2008-12-13 09:12:07 +00:00
pc8736x_gpio.c	pc8736x_gpio: add support for PC87365 chips	2008-10-20 08:52:40 -07:00
ppdev.c	ppdev: reduce kernel log spam	2009-06-18 13:03:54 -07:00
ps3flash.c	ps3flash: Always read chunks of 256 KiB, and cache them	2009-06-15 16:47:27 +10:00
pty.c	pty: Narrow the race on ldisc locking	2009-06-16 12:01:16 -07:00
random.c	Avoid ICE in get_random_int() with gcc-3.4.5	2009-05-19 11:25:35 -07:00
raw.c	Driver Core: raw: add nodename for raw devices	2009-06-15 21:30:26 -07:00
riscom8.c	riscom8: Auto-load riscom8 module when device opened.	2009-04-06 14:36:31 -07:00
riscom8.h	tty: add more tty_port fields	2008-07-20 17:12:38 -07:00
riscom8_reg.h
rocket.c	rocket: fix test_bit parameters	2009-06-11 08:50:58 -07:00
rocket.h	tty: rocketport uses different port flags to everyone else	2009-01-02 10:19:39 -08:00
rocket_int.h	tty: rocketport uses different port flags to everyone else	2009-01-02 10:19:39 -08:00
rtc.c	RTC: Remove the BKL.	2009-01-08 16:44:03 -07:00
scc.h	m68k: atari - Rename "mfp" to "st_mfp"	2009-02-22 09:23:02 -08:00
scx200_gpio.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
selection.c	tty: rewrite the ldisc locking	2009-06-11 08:51:01 -07:00
ser_a2232.c	m68k: ser_a2232 - Kill warn_unused_result warnings	2009-01-12 20:56:39 +01:00
ser_a2232.h
ser_a2232fw.ax
ser_a2232fw.h
serial167.c	tty: Remove some pointless casts	2009-01-02 10:19:40 -08:00
snsc.c	device create: char: convert device_create_drvdata to device_create	2008-10-16 09:24:42 -07:00
snsc.h	Convert asm/semaphore.h users to linux/semaphore.h	2008-04-18 22:22:54 -04:00
snsc_event.c	byteorder: don't directly include linux/byteorder/generic.h	2008-05-16 12:01:45 -07:00
sonypi.c	Rationalize fasync return values	2009-03-16 08:34:35 -06:00
specialix.c	specialix: Auto-load specialix module when device opened.	2009-04-06 14:36:31 -07:00
specialix_io8.h	tty: add more tty_port fields	2008-07-20 17:12:38 -07:00
stallion.c	tty: Add carrier processing on close to the tty_port core	2009-06-11 08:50:56 -07:00
sx.c	sx.c: avoid referencing freed memory if copy_from_user() fails	2009-02-20 17:57:49 -08:00
sx.h	Char: char/serial, remove SERIAL_TYPE_NORMAL redefines	2008-02-07 08:42:33 -08:00
sxboards.h
sxwindow.h
synclink.c	tty: Add carrier processing on close to the tty_port core	2009-06-11 08:50:56 -07:00
synclink_gt.c	tty: synclink_gt add receive pio mode	2009-06-11 08:50:57 -07:00
synclinkmp.c	tty: Add carrier processing on close to the tty_port core	2009-06-11 08:50:56 -07:00
sysrq.c	kexec: sysrq: simplify sysrq-c handler	2009-06-18 13:03:59 -07:00
tb0219.c	Add a bunch of cycle_kernel_lock() calls	2008-06-20 14:05:53 -06:00
tlclk.c	tlckl: BKL pushdown	2008-06-20 14:05:51 -06:00
toshiba.c	toshiba: use ioremap_cached	2008-04-30 23:15:34 +02:00
tty_audit.c	tty: remove buffer special casing	2009-06-11 08:51:02 -07:00
tty_buffer.c	tty: split the buffering from tty_io	2008-10-13 09:51:40 -07:00
tty_io.c	tty: fix sanity check	2009-06-16 12:01:16 -07:00
tty_ioctl.c	tty: fix unused warning when TCGETX is not defined	2009-06-16 12:01:16 -07:00
tty_ldisc.c	ldisc: debug aids	2009-06-16 12:01:16 -07:00
tty_port.c	tty: use prepare/finish_wait	2009-06-11 08:51:07 -07:00
vc_screen.c	vcs: hook sysfs devices into object lifetime instead of "binding"	2009-03-24 16:38:26 -07:00
viotape.c	tape: beyond ARRAY_SIZE of viocd_diskinfo	2009-06-02 10:32:34 +10:00
virtio_console.c	virtio: find_vqs/del_vqs virtio operations	2009-06-12 22:16:36 +09:30
vme_scc.c	m68k: vme_scc - Kill warn_unused_result warnings	2009-01-12 20:56:38 +01:00
vr41xx_giu.c	drivers/char: use nr_irqs	2008-10-16 16:52:05 +02:00
vt.c	console: make blank timeout value a boot option	2009-06-16 19:47:52 -07:00
vt_ioctl.c	vt: Add a note on the historical abuse of CLOCK_TICK_RATE	2009-05-06 14:47:13 -07:00