Now that the filesystem freeze operation has been elevated to the VFS, and
is just an ioctl away, some sort of safety net for unintentionally frozen
root filesystems may be in order.
The timeout thaw originally proposed did not get merged, but perhaps
something like this would be useful in emergencies.
For example, freeze /path/to/mountpoint may freeze your root filesystem if
you forgot that you had that unmounted.
I chose 'j' as the last remaining character other than 'h' which is sort
of reserved for help (because help is generated on any unknown character).
I've tested this on a non-root fs with multiple (nested) freezers, as well
as on a system rendered unresponsive due to a frozen root fs.
[randy.dunlap@oracle.com: emergency thaw only if CONFIG_BLOCK enabled]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: Takashi Sato <t-sato@yk.jp.nec.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change the page_mkwrite prototype to take a struct vm_fault, and return
VM_FAULT_xxx flags. There should be no functional change.
This makes it possible to return much more detailed error information to
the VM (and also can provide more information eg. virtual_address to the
driver, which might be important in some special cases).
This is required for a subsequent fix. And will also make it easier to
merge page_mkwrite() with fault() in future.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <joel.becker@oracle.com>
Cc: Artem Bityutskiy <dedekind@infradead.org>
Cc: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Allow non root users with sufficient mlock rlimits to be able to allocate
hugetlb backed shm for now. Deprecate this though. This is being
deprecated because the mlock based rlimit checks for SHM_HUGETLB is not
consistent with mmap based huge page allocations.
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Reviewed-by: Mel Gorman <mel@csn.ul.ie>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest-and-virtio:
lguest: barrier me harder
lguest: use bool instead of int
lguest: use KVM hypercalls
lguest: wire up pte_update/pte_update_defer
lguest: fix spurious BUG_ON() on invalid guest stack.
virtio: more neatening of virtio_ring macros.
virtio: fix BAD_RING, START_US and END_USE macros
* 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
hwmon: (fschmd) Add support for the FSC Hades IC
hwmon: (fschmd) Add support for the FSC Syleus IC
i2c-i801: Instantiate FSC hardware montioring chips
dmi: Let dmi_walk() users pass private data
hwmon: Define a standard interface for chassis intrusion detection
Move the pcf8591 driver to hwmon
hwmon: (w83627ehf) Only expose in6 or temp3 on the W83667HG
hwmon: (w83627ehf) Add support for W83667HG
hwmon: (w83627ehf) Invert fan pin variables logic
hwmon: (hdaps) Fix Thinkpad X41 axis inversion
hwmon: (hdaps) Allow inversion of separate axis
hwmon: (ds1621) Clean up documentation
hwmon: (ds1621) Avoid unneeded register access
hwmon: (ds1621) Clean up register access
hwmon: (ds1621) Reorder code statements
* 'proc-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/adobriyan/proc:
Revert "proc: revert /proc/uptime to ->read_proc hook"
proc 2/2: remove struct proc_dir_entry::owner
proc 1/2: do PDE usecounting even for ->read_proc, ->write_proc
proc: fix sparse warnings in pagemap_read()
proc: move fs/proc/inode-alloc.txt comment into a source file
Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy
as correctly noted at bug #12454. Someone can lookup entry with NULL
->owner, thus not pinning enything, and release it later resulting
in module refcount underflow.
We can keep ->owner and supply it at registration time like ->proc_fops
and ->data.
But this leaves ->owner as easy-manipulative field (just one C assignment)
and somebody will forget to unpin previous/pin current module when
switching ->owner. ->proc_fops is declared as "const" which should give
some thoughts.
->read_proc/->write_proc were just fixed to not require ->owner for
protection.
rmmod'ed directories will be empty and return "." and ".." -- no harm.
And directories with tricky enough readdir and lookup shouldn't be modular.
We definitely don't want such modular code.
Removing ->owner will also make PDE smaller.
So, let's nuke it.
Kudos to Jeff Layton for reminding about this, let's say, oversight.
http://bugzilla.kernel.org/show_bug.cgi?id=12454
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
* 'iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits)
dma-debug: make memory range checks more consistent
dma-debug: warn of unmapping an invalid dma address
dma-debug: fix dma_debug_add_bus() definition for !CONFIG_DMA_API_DEBUG
dma-debug/x86: register pci bus for dma-debug leak detection
dma-debug: add a check dma memory leaks
dma-debug: add checks for kernel text and rodata
dma-debug: print stacktrace of mapping path on unmap error
dma-debug: Documentation update
dma-debug: x86 architecture bindings
dma-debug: add function to dump dma mappings
dma-debug: add checks for sync_single_sg_*
dma-debug: add checks for sync_single_range_*
dma-debug: add checks for sync_single_*
dma-debug: add checking for [alloc|free]_coherent
dma-debug: add add checking for map/unmap_sg
dma-debug: add checking for map/unmap_page/single
dma-debug: add core checking functions
dma-debug: add debugfs interface
dma-debug: add kernel command line parameters
dma-debug: add initialization code
...
Fix trivial conflicts due to whitespace changes in arch/x86/kernel/pci-nommu.c
Define a standard interface for the chassis intrusion detection feature
some hardware monitoring chips have. Some drivers have custom sysfs
entries for it, but a standard interface would allow integration with
user-space (namely libsensors.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Acked-by: Matt Roberds <mattroberds@cox.net>
Directory drivers/i2c/chips is going away, so drivers there must find
new homes. For the pcf8591 driver, the best choice seems to be the
hwmon subsystem. While the Philips PCF8591 device isn't a typical
hardware monitoring chip, its DAC interface is compatible with the
hwmon one, so it fits somewhat.
If a better subsystem is ever created for ADC/DAC chips, the driver
could be moved there.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Add initial support for the Nuvoton W83667HG chip to the w83627ehf
driver. It has been tested on ASUS P5QL PRO by Gong Jun.
At the moment there is still a usability issue which is that only in6
or temp3 can be present on the W83667HG, so the driver shouldn't
expose both. This will be addressed later.
Signed-off-by: Gong Jun <JGong@nuvoton.com>
Acked-by: David Hubbard <david.c.hubbard@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
* The alarms sysfs file is deprecated, and individual alarm files are
self-explanatory.
* The driver doesn't implement high-reslution temperature readings so
don't document that.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>
* 'x86-stage-3-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (190 commits)
Revert "cpuacct: reduce one NULL check in fast-path"
Revert "x86: don't compile vsmp_64 for 32bit"
x86: Correct behaviour of irq affinity
x86: early_ioremap_init(), use __fix_to_virt(), because we are sure it's safe
x86: use default_cpu_mask_to_apicid for 64bit
x86: fix set_extra_move_desc calling
x86, PAT, PCI: Change vma prot in pci_mmap to reflect inherited prot
x86/dmi: fix dmi_alloc() section mismatches
x86: e820 fix various signedness issues in setup.c and e820.c
x86: apic/io_apic.c define msi_ir_chip and ir_ioapic_chip all the time
x86: irq.c keep CONFIG_X86_LOCAL_APIC interrupts together
x86: irq.c use same path for show_interrupts
x86: cpu/cpu.h cleanup
x86: Fix a couple of sparse warnings in arch/x86/kernel/apic/io_apic.c
Revert "x86: create a non-zero sized bm_pte only when needed"
x86: pci-nommu.c cleanup
x86: io_delay.c cleanup
x86: rtc.c cleanup
x86: i8253 cleanup
x86: kdebugfs.c cleanup
...
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (180 commits)
powerpc: clean up ssi.txt, add definition for fsl,ssi-asynchronous
powerpc/85xx: Add support for the "socrates" board (MPC8544).
powerpc: Fix bugs introduced by sysfs changes
powerpc: Sanitize stack pointer in signal handling code
powerpc: Add write barrier before enabling DTL flags
powerpc/83xx: Update ranges in gianfar node to match other dts
powerpc/86xx: Move gianfar mdio nodes under the ethernet nodes
powerpc/85xx: Move gianfar mdio nodes under the ethernet nodes
powerpc/83xx: Move gianfar mdio nodes under the ethernet nodes
powerpc/83xx: Add power management support for MPC837x boards
powerpc/mm: Introduce early_init_mmu() on 64-bit
powerpc/mm: Add option for non-atomic PTE updates to ppc64
powerpc/mm: Fix printk type warning in mmu_context_nohash
powerpc/mm: Rename arch/powerpc/kernel/mmap.c to mmap_64.c
powerpc/mm: Merge various PTE bits and accessors definitions
powerpc/mm: Tweak PTE bit combination definitions
powerpc/cell: Fix iommu exception reporting
powerpc/mm: e300c2/c3/c4 TLB errata workaround
powerpc/mm: Used free register to save a few cycles in SW TLB miss handling
powerpc/mm: Remove unused register usage in SW TLB miss handling
...
Documentation/video4linux/v4lgrab.c: In function ‘main’:
Documentation/video4linux/v4lgrab.c:193: warning: ‘src_depth’ is used uninitialized in this function
Documentation/video4linux/v4lgrab.c:108: warning: ‘b’ may be used uninitialized in this function
Documentation/video4linux/v4lgrab.c:108: warning: ‘g’ may be used uninitialized in this function
Documentation/video4linux/v4lgrab.c:108: warning: ‘r’ may be used uninitialized in this function
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Add support for ProVideo PV-183 to bttv
This patch adds support for the ProVideo PV-183 card to the bttv
device driver. The PV-183 is a PCI card with 8 BT878 devices plus a Hint
Corp HiNT HB4 PCI-PCI Bridge. Each BT878 has two composite input channels
available. There are no tuners on this card.
Signed-off-by: Alan McIvor <alan.mcivor@reveal.co.nz>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Call v4l2_device_disconnect when the parent of a hotpluggable device
disconnects. This ensures that you do not have a pointer to a device that
is no longer present.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Add a notify callback to v4l2_device to let sub-devices notify their
parent of special events.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Normally the parent device of v4l2_device is used as the video device
node's parent. But if it was not set, then use the parent field in the
video_device struct.
This is needed in the cx88 driver, which has one core v4l2_device but
creates multiple pci devices (one each for raw and mpeg video).
So you cannot associate the core v4l2_device with a particular PCI device,
but you can do that for each video_device.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Emphasize the need to call i2c_set_adapdata and clarify the use of the
chipid in v4l2_i2c_new_(probed_)device().
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This patch adds support for Terratec Cinergy HT PCI MKII with card id 79.
Its more or less a copy of Pinnacle Hybrid PCTV.
Thanks to k1ngf1sher on forum.ubuntuusers.de for the idea to copy that card.
Signed-off-by: Stephan Wienczny <stephan@wienczny.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The lock_norm module parameter doesn't look terribly useful. If you
don't want to change the norm, just don't change it. As a matter of
fact, no other v4l driver has such a parameter.
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
replace occurances of "HVR1150" with "HVR1120" - this was a typo.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
changeset 04934e44e3784a1b969582e2d59afcec278470c6 removed the last implementation
that were still using the V4L1 obsoleted header.
Now, video_decoder.h is not used anymore by any driver.
Let's remove it and all references for it in Kernel.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
I have a GeoVision GV-800(S) card, it has 4 CONEXANT BT878A chips.
It has 16 video inputs and 4 audio inputs, and it is almost identical
to the GV-800, as seen on http://bttv-gallery.de .
The only difference appears to be the analog mux, it has a CD22M3494
in place of the MT8816AP. The card has a blue PCB, as seen in this
picture: http://www.gsbr.com.br/imagem/kits/GeoVision%20GV%20800.jpg .
This card wasn't originally supported, and it was detected as
UNKNOWN/GENERIC. The video inputs weren't working, so I tried
"forcing" a few cards like the GeoVision GV-600, but there was still
no video. So I made a patch to support this card, based on the Kodicom
4400r.
The GV-800(S) is identified as follows:
...
02:00.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 11)
02:00.1 Multimedia controller: Brooktree Corporation Bt878 Audio
Capture (rev 11)
02:04.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 11)
02:04.1 Multimedia controller: Brooktree Corporation Bt878 Audio
Capture (rev 11)
02:08.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 11)
02:08.1 Multimedia controller: Brooktree Corporation Bt878 Audio
Capture (rev 11)
02:0c.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 11)
02:0c.1 Multimedia controller: Brooktree Corporation Bt878 Audio
Capture (rev 11)
...
02:00.0 0400: 109e:036e (rev 11)
Subsystem: 800a:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdfff000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
Kernel modules: bttv
02:00.1 0480: 109e:0878 (rev 11)
Subsystem: 800a:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdffe000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
02:04.0 0400: 109e:036e (rev 11)
Subsystem: 800b:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdffd000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
Kernel modules: bttv
02:04.1 0480: 109e:0878 (rev 11)
Subsystem: 800b:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdffc000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
02:08.0 0400: 109e:036e (rev 11)
Subsystem: 800c:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdffb000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
Kernel modules: bttv
02:08.1 0480: 109e:0878 (rev 11)
Subsystem: 800c:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdffa000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
02:0c.0 0400: 109e:036e (rev 11)
Subsystem: 800d:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdff9000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
Kernel modules: bttv
02:0c.1 0480: 109e:0878 (rev 11)
Subsystem: 800d:763d
Flags: bus master, medium devsel, latency 32, IRQ 10
Memory at cdff8000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
As you can see, the GV-800(S) card is almost identical to the GV-800
on bttv-gallery, so this patch might also work for that card. If not,
only a few changes should be required on the gv800s_write() function.
After this patch, the video inputs work correctly on linux 2.6.24 and
2.6.27 using the software 'motion'. The input order may seem a little
odd, but it's the order the original software/driver uses, and I decided
to keep that order to get the most out of the card.
I tried to get the audio working with the snd-bt87x module, but I only
get noise from every audio input, even after selecting a different mux
with alsamixer. Also, after trying to play sound from those sources, I
randomly get a RISC error about an invalid RISC opcode, and then that
output stops working. I also can't change the sampling rate when
recording. Any pointers to adding audio support are welcome.
Signed-off-by: Bruno Christo <bchristo@inf.ufsm.br>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Add support for NetUP Dual DVB-S2 CI card
The card based on cx23885 PCI-e bridge, CiMax SP2 Common Interface chips,
STM lnbh24 LNB power chip, stv6110 tuners and stv0900 demodulator.
http://www.linuxtv.org/wiki/index.php/NetUP_Dual_DVB_S2_CI
Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Added usb vendor/product id for Kaiser Baas Video to DVD maker.
Thanks to Trevor Campbell <tca42186@bigpond.net.au> for providing all data and tests needed to add this card to em28xx driver.
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Added SIIG AVTuner-PVR to the right entry.
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Removed EM2821_BOARD_PROLINK_PLAYTV_USB2 entry.
This entry has a incorrect tuner set.
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
include/linux/video_encoder.h is not used anymore by a v4l driver.
Let's remove it and its occurences.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Remain consistent in the naming: fields pointing to v4l2_device should
be called v4l2_dev. There are too many device-like entities without
adding to the confusion by mixing naming conventions.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Some drivers (e.g. for ISA devices) have no parent device because there
is no associated bus driver. Allow the parent device to be NULL in
those cases when registering v4l2_device.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Documents the driver usage functions, instead of the generic one used
by the videobuf specific handlers.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Added board Pinnacle Dazzle Video Creator Plus DVC107 to name description field.
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
- "DealExtreme" sells the "PCear" radio and that comes from "Sanei Electric".
- MPlayer is also usable as radio application.
- Consistent usage of tabulators and blanks in the code.
Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
