10 years agoMerge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Thu, 25 Feb 2010 22:44:33 +0000]
Merge branch 'for-linus-2' of git://git./linux/kernel/git/rostedt/linux-2.6-kconfig

* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig:
  kconfig: Simplify LSMOD= handling
  kconfig: Add LSMOD=file to override the lsmod for localmodconfig
  kconfig: Look in both /bin and /sbin for lsmod in streamline_config.pl
  kconfig: Check for if conditions in Kconfig for localmodconfig
  kconfig: Create include/generated for localmodconfig

10 years agoMerge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Thu, 25 Feb 2010 22:43:57 +0000]
Merge branch 'for-linus-1' of git://git./linux/kernel/git/rostedt/linux-2.6-kconfig

* 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig:
  kconfig: simplification of scripts/extract-ikconfig

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Thu, 25 Feb 2010 22:42:39 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (41 commits)
  HID: usbhid: initialize interface pointers early enough
  HID: extend mask for BUTTON usage page
  HID: hid-ntrig: Single touch mode tap
  HID: hid-ntrig: multitouch cleanup and fix
  HID: n-trig: remove unnecessary tool switching
  HID: hid-ntrig add multi input quirk and clean up
  HID: usbhid: introduce timeout for stuck ctrl/out URBs
  HID: magicmouse: coding style and probe failure fixes
  HID: remove MODULE_VERSION from new drivers
  HID: fix up Kconfig entry for MagicMouse
  HID: add a device driver for the Apple Magic Mouse.
  HID: Export hid_register_report
  HID: Support for MosArt multitouch panel
  HID: add pressure support for the Stantum multitouch panel
  HID: fixed bug in single-touch emulation on the stantum panel
  HID: fix typo in error message
  HID: add mapping for "AL Network Chat" usage
  HID: use multi input quirk for TouchPack touchscreen
  HID: make full-fledged hid-bus drivers properly selectable
  HID: make Wacom modesetting failures non-fatal
  ...

10 years agoMerge branches 'upstream', 'raw_report_modifications' and 'apple_magic_mouse' into...
Jiri Kosina [Thu, 25 Feb 2010 16:39:16 +0000]
Merge branches 'upstream', 'raw_report_modifications' and 'apple_magic_mouse' into for-linus

Conflicts:
drivers/hid/Kconfig

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
Linus Torvalds [Thu, 25 Feb 2010 15:22:59 +0000]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (44 commits)
  Add MAINTAINERS entry for virtio_console
  virtio: console: Fill ports' entire in_vq with buffers
  virtio: console: Error out if we can't allocate buffers for control queue
  virtio: console: Add ability to remove module
  virtio: console: Ensure no memleaks in case of unused buffers
  virtio: console: show error message if hvc_alloc fails for console ports
  virtio: console: Add debugfs files for each port to expose debug info
  virtio: console: Add ability to hot-unplug ports
  virtio: console: Handle port hot-plug
  virtio: console: Remove cached data on port close
  virtio: console: Register with sysfs and create a 'name' attribute for ports
  virtio: console: Ensure only one process can have a port open at a time
  virtio: console: Add file operations to ports for open/read/write/poll
  virtio: console: Associate each port with a char device
  virtio: console: Prepare for writing to userspace buffers
  virtio: console: Add a new MULTIPORT feature, support for generic ports
  virtio: console: Introduce a send_buf function for a common path for sending data to host
  virtio: console: Introduce function to hand off data from host to readers
  virtio: console: Separate out find_vqs operation into a different function
  virtio: console: Separate out console init into a new function
  ...

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Thu, 25 Feb 2010 15:09:54 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  netlabel: fix export of SELinux categories > 127

10 years agonetlabel: fix export of SELinux categories > 127
Joshua Roys [Wed, 24 Feb 2010 23:52:44 +0000]
netlabel: fix export of SELinux categories > 127

This fixes corrupted CIPSO packets when SELinux categories greater than 127
are used.  The bug occured on the second (and later) loops through the
while; the inner for loop through the ebitmap->maps array used the same
index as the NetLabel catmap->bitmap array, even though the NetLabel bitmap
is twice as long as the SELinux bitmap.

Signed-off-by: Joshua Roys <joshua.roys@gtri.gatech.edu>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>

10 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Thu, 25 Feb 2010 05:12:11 +0000]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  ahci: disable FPDMA auto-activate optimization on NVIDIA AHCI

10 years agoahci: disable FPDMA auto-activate optimization on NVIDIA AHCI
Robert Hancock [Wed, 27 Jan 2010 04:33:23 +0000]
ahci: disable FPDMA auto-activate optimization on NVIDIA AHCI

Mike Cui reported that his system with an NVIDIA MCP79 (aka MCP7A)
chipset stopped working with 2.6.32. The problem appears to be that
2.6.32 now enables the FPDMA auto-activate optimization in the ahci
driver. The drive works fine with this enabled on an Intel AHCI so
this appears to be a chipset bug.  Since MCP79 is a fairly recent
NVIDIA chipset and we don't have any info on whether any other NVIDIA
chipsets have this issue, disable FPDMA AA optimization on all NVIDIA
AHCI controllers for now.

Should address http://bugzilla.kernel.org/show_bug.cgi?id=14922

Signed-off-by: Robert Hancock <hancockrwd@gmail.com>
While-we-investigate-issue-this-patch-looks-good-to-me-by:
Prajakta Gudadhe <pgudadhe@nvidia.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: stable@kernel.org

10 years agosecurity: fix error return path in ima_inode_alloc
Xiaotian Feng [Wed, 24 Feb 2010 10:39:02 +0000]
security: fix error return path in ima_inode_alloc

If radix_tree_preload is failed in ima_inode_alloc, we don't need
radix_tree_preload_end because kernel is alread preempt enabled

Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

10 years agoLinux 2.6.33
Linus Torvalds [Wed, 24 Feb 2010 18:52:17 +0000]
Linux 2.6.33

10 years agoMerge branch 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6
Linus Torvalds [Wed, 24 Feb 2010 18:51:21 +0000]
Merge branch 'urgent' of git://git./linux/kernel/git/kyle/parisc-2.6

* 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
  parisc: Set PCI CLS early in boot.

10 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
Linus Torvalds [Wed, 24 Feb 2010 18:51:04 +0000]
Merge branch 'release' of git://git./linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Fix broken sn2 build

10 years agoparisc: Set PCI CLS early in boot.
Carlos O'Donell [Mon, 22 Feb 2010 23:25:59 +0000]
parisc: Set PCI CLS early in boot.

Set the PCI CLS early in the boot process to prevent
device failures. In pcibios_set_master use the new
pci_cache_line_size instead of a hard-coded value.

Signed-off-by: Carlos O'Donell <carlos@codesourcery.com>
Reviewed-by: Grant Grundler <grundler@google.com>
Signed-off-by: Kyle McMartin <kyle@redhat.com>

10 years agoMerge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze
Linus Torvalds [Wed, 24 Feb 2010 15:43:02 +0000]
Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze

* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Fix out_le32() macro
  microblaze: Fix cache loop function for cache range

10 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Wed, 24 Feb 2010 15:42:42 +0000]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Revert "block: improve queue_should_plug() by looking at IO depths"

10 years agomicroblaze: Fix out_le32() macro
Steven J. Magnani [Mon, 22 Feb 2010 15:25:42 +0000]
microblaze: Fix out_le32() macro

Trailing semicolon causes compilation involving out_le32() to fail.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

10 years agomicroblaze: Fix cache loop function for cache range
Michal Simek [Mon, 15 Feb 2010 09:50:42 +0000]
microblaze: Fix cache loop function for cache range

I create wrong asm code but none test shows that this part of code is wrong.
I am not convinces that were good idea to create asm optimized macros
for caches. The reason is that there is not optimization with previous code
that's why make sense to add old code and do some benchmarking which
functions are faster.

Signed-off-by: Michal Simek <monstr@monstr.eu>

10 years agoAdd MAINTAINERS entry for virtio_console
Amit Shah [Fri, 12 Feb 2010 05:02:19 +0000]
Add MAINTAINERS entry for virtio_console

I'm taking ownership of the virtio_console module; but I'll continue
feeding patches via Rusty.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Fill ports' entire in_vq with buffers
Amit Shah [Fri, 12 Feb 2010 05:02:18 +0000]
virtio: console: Fill ports' entire in_vq with buffers

Instead of allocating just one buffer for a port's in_vq, fill
the entire in_vq with buffers so the host need not stall while
an application consumes the data and makes the buffer available
again for the host.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Error out if we can't allocate buffers for control queue
Amit Shah [Fri, 12 Feb 2010 05:02:17 +0000]
virtio: console: Error out if we can't allocate buffers for control queue

With MULTIPORT support, the control queue is an integral part of the
functioning of the device. If we can't get any buffers allocated, the
host won't be able to relay important information and the device may not
function as intended.

Ensure 'probe' doesn't succeed until the control queue has at least one
buffer allocated for its ivq.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Add ability to remove module
Amit Shah [Fri, 12 Feb 2010 05:02:16 +0000]
virtio: console: Add ability to remove module

Add the ability to remove the virtio_console module.

This aids debugging.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Ensure no memleaks in case of unused buffers
Amit Shah [Fri, 12 Feb 2010 05:02:15 +0000]
virtio: console: Ensure no memleaks in case of unused buffers

If unused data exists in in_vq, ensure we flush that first and then
detach unused buffers, which will ensure all buffers from the in_vq are
removed.

Also ensure we free the buffers after detaching them.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: show error message if hvc_alloc fails for console ports
Amit Shah [Mon, 18 Jan 2010 11:05:23 +0000]
virtio: console: show error message if hvc_alloc fails for console ports

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Add debugfs files for each port to expose debug info
Amit Shah [Mon, 21 Dec 2009 17:06:21 +0000]
virtio: console: Add debugfs files for each port to expose debug info

This is helpful in examining ports' state.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Add ability to hot-unplug ports
Amit Shah [Mon, 21 Dec 2009 16:57:31 +0000]
virtio: console: Add ability to hot-unplug ports

Remove port data; deregister from the hvc core if it's a console port.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Handle port hot-plug
Amit Shah [Mon, 21 Dec 2009 16:52:08 +0000]
virtio: console: Handle port hot-plug

If the 'nr_ports' variable in the config space is updated to a higher
value, that means new ports have been hotplugged.

Introduce a new workqueue to handle such updates and create new ports.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Remove cached data on port close
Amit Shah [Mon, 21 Dec 2009 16:45:30 +0000]
virtio: console: Remove cached data on port close

Remove any data that we might have in a port's inbuf when closing a port
or when any data is received when a port is closed.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Register with sysfs and create a 'name' attribute for ports
Amit Shah [Mon, 21 Dec 2009 16:27:40 +0000]
virtio: console: Register with sysfs and create a 'name' attribute for ports

The host can set a name for ports so that they're easily discoverable
instead of going by the /dev/vportNpn naming. This attribute will be
placed in /sys/class/virtio-ports/vportNpn/name. udev scripts can then
create symlinks to the port using the name.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Ensure only one process can have a port open at a time
Amit Shah [Thu, 26 Nov 2009 05:55:38 +0000]
virtio: console: Ensure only one process can have a port open at a time

Add a guest_connected field that ensures only one process
can have a port open at a time.

This also ensures we don't have a race when we later add support for
dropping buffers when closing the char dev and buffer caching is turned
off for the particular port.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Add file operations to ports for open/read/write/poll
Amit Shah [Mon, 21 Dec 2009 16:19:30 +0000]
virtio: console: Add file operations to ports for open/read/write/poll

Allow guest userspace applications to open, read from, write to, poll
the ports via the char dev interface.

When a port gets opened, a notification is sent to the host via a
control message indicating a connection has been established. Similarly,
on closing of the port, a notification is sent indicating disconnection.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Associate each port with a char device
Amit Shah [Mon, 21 Dec 2009 16:06:04 +0000]
virtio: console: Associate each port with a char device

The char device will be used as an interface by applications on the
guest to communicate with apps on the host.

The devices created are placed in /dev/vportNpn where N is the
virtio-console device number and n is the port number for that device.

One dynamic major device number is allocated for each device and minor
numbers are allocated for the ports contained within that device.

The file operation for the char devs will be added in the following
commits.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Prepare for writing to userspace buffers
Amit Shah [Mon, 21 Dec 2009 15:56:45 +0000]
virtio: console: Prepare for writing to userspace buffers

When ports get advertised as char devices, the buffers will come from
userspace. Equip the fill_readbuf function with the ability to write
to userspace buffers.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Add a new MULTIPORT feature, support for generic ports
Amit Shah [Mon, 21 Dec 2009 15:33:25 +0000]
virtio: console: Add a new MULTIPORT feature, support for generic ports

This commit adds a new feature, MULTIPORT. If the host supports this
feature as well, the config space has the number of ports defined for
that device. New ports are spawned according to this information.

The config space also has the maximum number of ports that can be
spawned for a particular device. This is useful in initializing the
appropriate number of virtqueues in advance, as ports might be
hot-plugged in later.

Using this feature, generic ports can be created which are not tied to
hvc consoles.

We also open up a private channel between the host and the guest via
which some "control" messages are exchanged for the ports, like whether
the port being spawned is a console port, resizing the console window,
etc.

Next commits will add support for hotplugging and presenting char
devices in /dev/ for bi-directional guest-host communication.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Introduce a send_buf function for a common path for sending data...
Amit Shah [Mon, 21 Dec 2009 11:58:51 +0000]
virtio: console: Introduce a send_buf function for a common path for sending data to host

Adding support for generic ports that will write to userspace will need
some code changes.

Consolidate the write routine into send_buf() and put_chars() now just
calls into the new function.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Introduce function to hand off data from host to readers
Amit Shah [Mon, 18 Jan 2010 13:45:12 +0000]
virtio: console: Introduce function to hand off data from host to readers

In preparation for serving data to userspace (generic ports) as well as
in-kernel users (hvc consoles), separate out the functionality common to
both in a 'fill_readbuf()' function.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Separate out find_vqs operation into a different function
Amit Shah [Mon, 18 Jan 2010 13:45:11 +0000]
virtio: console: Separate out find_vqs operation into a different function

With support for multiple ports, each port will have its own input and
output vqs. Prepare the probe function for this change.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Separate out console init into a new function
Amit Shah [Mon, 18 Jan 2010 13:45:10 +0000]
virtio: console: Separate out console init into a new function

Console ports could be hot-added. Also, with the new multiport support,
a port is identified as a console port only if the host sends a control
message.

Move the console port init into a separate function so it can be invoked
from other places.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: Separate out console-specific data into a separate struct
Amit Shah [Mon, 18 Jan 2010 13:45:09 +0000]
virtio: console: Separate out console-specific data into a separate struct

Move out console-specific stuff into a separate struct from 'struct
port' as we need to maintain two lists: one for all the ports (which
includes consoles) and one only for consoles since the hvc callbacks
only give us the vtermno.

This makes console handling cleaner.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: ensure console size is updated on hvc open
Amit Shah [Mon, 18 Jan 2010 13:45:08 +0000]
virtio: console: ensure console size is updated on hvc open

When multiple console support is added, ensure each port's size gets
updated when a new one is opened via hvc.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: struct ports for multiple ports per device.
Amit Shah [Mon, 18 Jan 2010 13:45:07 +0000]
virtio: console: struct ports for multiple ports per device.

Rather than assume a single port, add a 'struct ports_device' which
stores data related to all the ports for that device.

Currently, there's only one port and is hooked up with hvc, but that
will change.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: remove global var
Rusty Russell [Mon, 18 Jan 2010 13:45:06 +0000]
virtio: console: remove global var

Now we can use an allocation function to remove our global console variable.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: don't assume a single console port.
Amit Shah [Mon, 18 Jan 2010 13:45:05 +0000]
virtio: console: don't assume a single console port.

Keep a list of all ports being used as a console, and provide a lock
and a lookup function.  The hvc callbacks only give us a vterm number,
so we need to map this.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: use vdev->priv to avoid accessing global var.
Rusty Russell [Mon, 18 Jan 2010 13:45:04 +0000]
virtio: console: use vdev->priv to avoid accessing global var.

Part of removing our "one console" assumptions, use vdev->priv to point
to the port (currently == the global console).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: introduce a get_inbuf helper to fetch bufs from in_vq
Amit Shah [Mon, 18 Jan 2010 13:45:03 +0000]
virtio: console: introduce a get_inbuf helper to fetch bufs from in_vq

This makes taking locks around the get_buf vq operation easier, as well
as complements the add_inbuf() operation.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: ensure add_inbuf can work for multiple ports as well
Amit Shah [Mon, 18 Jan 2010 13:45:02 +0000]
virtio: console: ensure add_inbuf can work for multiple ports as well

add_inbuf() assumed one port and one inbuf per port. Remove that
assumption.

Also move the function so that put_chars and get_chars are together.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: encapsulate buffer information in a struct
Amit Shah [Mon, 18 Jan 2010 13:45:01 +0000]
virtio: console: encapsulate buffer information in a struct

Collect port buffer, used_len, offset fields into a single structure.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: port encapsulation
Rusty Russell [Mon, 18 Jan 2010 13:45:00 +0000]
virtio: console: port encapsulation

We are heading towards a multiple-"port" system, so as part of weaning off
globals we encapsulate the information into 'struct port'.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: We support only one device at a time
Amit Shah [Mon, 18 Jan 2010 13:44:59 +0000]
virtio: console: We support only one device at a time

We support only one virtio_console device at a time. If multiple are
found, error out if one is already initialized.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agohvc_console: make the ops pointer const.
Rusty Russell [Sat, 28 Nov 2009 06:50:26 +0000]
hvc_console: make the ops pointer const.

This is nicer for modern R/O protection.  And noone needs it non-const, so
constify the callers as well.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: linuxppc-dev@ozlabs.org

10 years agovirtio: console: statically initialize virtio_cons
Rusty Russell [Mon, 18 Jan 2010 13:44:56 +0000]
virtio: console: statically initialize virtio_cons

That way, we can make it const as is good kernel style.  We use a separate
indirection for the early console, rather than mugging ops.put_chars.

We rename it hv_ops, too.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: console: comment cleanup
Rusty Russell [Mon, 18 Jan 2010 13:44:55 +0000]
virtio: console: comment cleanup

Remove old lguest-style comments.

[Amit: - wingify comments acc. to kernel style
       - indent comments ]

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: Initialize vq->data entries to NULL
Amit Shah [Fri, 12 Feb 2010 05:02:14 +0000]
virtio: Initialize vq->data entries to NULL

vq operations depend on vq->data[i] being NULL to figure out if the vq
entry is in use (since the previous patch).

We have to initialize them to NULL to ensure we don't work with junk
data and trigger false BUG_ONs.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Shirley Ma <xma@us.ibm.com>

10 years agovirtio: Add ability to detach unused buffers from vrings
Shirley Ma [Mon, 18 Jan 2010 13:45:23 +0000]
virtio: Add ability to detach unused buffers from vrings

There's currently no way for a virtio driver to ask for unused
buffers, so it has to keep a list itself to reclaim them at shutdown.
This is redundant, since virtio_ring stores that information.  So
add a new hook to do this.

Signed-off-by: Shirley Ma <xma@us.ibm.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio_blk: add block topology support
Christoph Hellwig [Wed, 24 Feb 2010 20:22:25 +0000]
virtio_blk: add block topology support

Allow reading various alignment values from the config page.  This
allows the guest to much better align I/O requests depending on the
storage topology.

Note that the formats for the config values appear a bit messed up,
but we follow the formats used by ATA and SCSI so they are expected in
the storage world.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: use smp_XX barriers on SMP
Michael S. Tsirkin [Wed, 27 Jan 2010 22:42:23 +0000]
virtio: use smp_XX barriers on SMP

virtio is communicating with a virtual "device" that actually runs on
another host processor. Thus SMP barriers can be used to control
memory access ordering.

Where possible, we should use SMP barriers which are more lightweight than
mandatory barriers, because mandatory barriers also control MMIO effects on
accesses through relaxed memory I/O windows (which virtio does not use)
(compare specifically smp_rmb and rmb on x86_64).

We can't just use smp_mb and friends though, because
we must force memory ordering even if guest is UP since host could be
running on another CPU, but SMP barriers are defined to barrier() in
that configuration. So, for UP fall back to mandatory barriers instead.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: remove bogus barriers from DEBUG version of virtio_ring.c
Rusty Russell [Wed, 24 Feb 2010 20:22:22 +0000]
virtio: remove bogus barriers from DEBUG version of virtio_ring.c

With DEBUG defined, we add an ->in_use flag to detect if the caller
invokes two virtio methods in parallel.  The barriers attempt to ensure
timely update of the ->in_use flag.

But they're voodoo: if we need these barriers it implies that the
calling code doesn't have sufficient synchronization to ensure the
code paths aren't invoked at the same time anyway, and we want to
detect it.

Also, adding barriers changes timing, so turning on debug has more
chance of hiding real problems.

Thanks to MST for drawing my attention to this code...

CC: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agolguest: remove unneeded zlib.h include in example launcher
Rusty Russell [Wed, 24 Feb 2010 20:22:18 +0000]
lguest: remove unneeded zlib.h include in example launcher

Two years ago 5bbf89fc2608 removed the horrible bzImage unpacking code.
Now it's time to remove the unneeded zlib.h include, too.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: fix balloon without VIRTIO_BALLOON_F_STATS_VQ
Rusty Russell [Wed, 24 Feb 2010 20:22:14 +0000]
virtio: fix balloon without VIRTIO_BALLOON_F_STATS_VQ

When running under qemu-kvm-0.11.0:

BUG: unable to handle kernel paging request at 56e58955
...
Process vballoon (pid: 1297, ti=c7976000 task=c70a6ca0 task.ti=c7
...
Call Trace:
 [<c88253a3>] ? balloon+0x1b3/0x440 [virtio_balloon]
 [<c041c2d7>] ? schedule+0x327/0x9d0
 [<c88251f0>] ? balloon+0x0/0x440 [virtio_balloon]
 [<c014a2d4>] ? kthread+0x74/0x80
 [<c014a260>] ? kthread+0x0/0x80
 [<c0103b36>] ? kernel_thread_helper+0x6/0x30

need_stats_update should be zero-initialized.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Adam Litke <agl@us.ibm.com>

10 years agovirtio: Fix scheduling while atomic in virtio_balloon stats
Adam Litke [Thu, 10 Dec 2009 22:35:15 +0000]
virtio: Fix scheduling while atomic in virtio_balloon stats

This is a fix for my earlier patch: "virtio: Add memory statistics reporting to
the balloon driver (V4)".

I discovered that all_vm_events() can sleep and therefore stats collection
cannot be done in interrupt context.  One solution is to handle the interrupt
by noting that stats need to be collected and waking the existing vballoon
kthread which will complete the work via stats_handle_request().  Rusty, is
this a saner way of doing business?

There is one issue that I would like a broader opinion on.  In stats_request, I
update vb->need_stats_update and then wake up the kthread.  The kthread uses
vb->need_stats_update as a condition variable.  Do I need a memory barrier
between the update and wake_up to ensure that my kthread sees the correct
value?  My testing suggests that it is not needed but I would like some
confirmation from the experts.

Signed-off-by: Adam Litke <agl@us.ibm.com>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: Anthony Liguori <aliguori@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agovirtio: Add memory statistics reporting to the balloon driver (V4)
Adam Litke [Mon, 30 Nov 2009 16:14:15 +0000]
virtio: Add memory statistics reporting to the balloon driver (V4)

Changes since V3:
 - Do not do endian conversions as they will be done in the host
 - Report stats that reference a quantity of memory in bytes
 - Minor coding style updates

Changes since V2:
 - Increase stat field size to 64 bits
 - Report all sizes in kb (not pages)
 - Drop anon_pages stat and fix endianness conversion

Changes since V1:
 - Use a virtqueue instead of the device config space

When using ballooning to manage overcommitted memory on a host, a system for
guests to communicate their memory usage to the host can provide information
that will minimize the impact of ballooning on the guests.  The current method
employs a daemon running in each guest that communicates memory statistics to a
host daemon at a specified time interval.  The host daemon aggregates this
information and inflates and/or deflates balloons according to the level of
host memory pressure.  This approach is effective but overly complex since a
daemon must be installed inside each guest and coordinated to communicate with
the host.  A simpler approach is to collect memory statistics in the virtio
balloon driver and communicate them directly to the hypervisor.

This patch enables the guest-side support by adding stats collection and
reporting to the virtio balloon driver.

Signed-off-by: Adam Litke <agl@us.ibm.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (minor fixes)

10 years agoAdd __devexit_p around reference to virtio_pci_remove
Jamie Lokier [Fri, 8 Jan 2010 22:01:43 +0000]
Add __devexit_p around reference to virtio_pci_remove

This is needed to compile with CONFIG_VIRTIO_PCI=y,
because virtio_pci_remove is marked __devexit.

Signed-off-by: Jamie Lokier <jamie@shareable.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Wed, 24 Feb 2010 03:44:07 +0000]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  net: bug fix for vlan + gro issue
  tc35815: Remove a wrong netif_wake_queue() call which triggers BUG_ON
  cdc_ether: new PID for Ericsson C3607w to the whitelist (resubmit)
  IPv6: better document max_addresses parameter
  MAINTAINERS: update mv643xx_eth maintenance status
  e1000: Fix DMA mapping error handling on RX
  iwlwifi: sanity check before counting number of tfds can be free
  iwlwifi: error checking for number of tfds in queue
  iwlwifi: set HT flags after channel in rxon

10 years agonet: bug fix for vlan + gro issue
Ajit Khaparde [Tue, 16 Feb 2010 20:25:43 +0000]
net: bug fix for vlan + gro issue

Traffic (tcp) doesnot start on a vlan interface when gro is enabled.
Even the tcp handshake was not taking place.
This is because, the eth_type_trans call before the netif_receive_skb
in napi_gro_finish() resets the skb->dev to napi->dev from the previously
set vlan netdev interface. This causes the ip_route_input to drop the
incoming packet considering it as a packet coming from a martian source.

I could repro this on 2.6.32.7 (stable) and 2.6.33-rc7.
With this fix, the traffic starts and the test runs fine on both vlan
and non-vlan interfaces.

CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
Linus Torvalds [Wed, 24 Feb 2010 02:15:05 +0000]
Merge branch 'release' of git://git./linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: Be in TS_POLLING state during mwait based C-state entry
  ACPI: Fix regression where _PPC is not read at boot even when ignore_ppc=0
  acer-wmi: Respect current backlight level when loading

10 years agoMerge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Wed, 24 Feb 2010 02:13:34 +0000]
Merge branch 'drm-linus' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/vmwgfx: Fix queries if no dma buffer thrashing is occuring.
  drm/nv50: fix vram ptes on IGPs to point at stolen system memory
  drm/nv50: fix instmem binding on IGPs to point at stolen system memory
  drm/nv50: improve vram page table construction
  drm/nv50: more efficient clearing of gpu page table entries
  drm/nv50: make nv50_mem_vm_{bind,unbind} operate only on vram
  drm/nouveau: Fix up pre-nv17 analog load detection.

10 years ago[IA64] Fix broken sn2 build
Hedi Berriche [Tue, 23 Feb 2010 23:58:49 +0000]
[IA64] Fix broken sn2 build

Revert the change made to arch/ia64/sn/kernel/setup.c by commit
204fba4aa303ea4a7bb726a539bf4a5b9e3203d0 as it breaks the build.

Fixing the build the b94b08081fcecf83fa690d6c5664f6316fe72208 way
breaks xpc because genksyms then fails to generate an CRC for
per_cpu____sn_cnodeid_to_nasid because of limitations in the
generic genksyms code.

Signed-off-by: Hedi Berriche <hedi@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

10 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
David S. Miller [Tue, 23 Feb 2010 09:27:05 +0000]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6

10 years agotc35815: Remove a wrong netif_wake_queue() call which triggers BUG_ON
Atsushi Nemoto [Fri, 19 Feb 2010 05:13:58 +0000]
tc35815: Remove a wrong netif_wake_queue() call which triggers BUG_ON

The netif_wake_queue() is called correctly (i.e. only on !txfull
condition) from txdone routine.  So Unconditional call to the
netif_wake_queue() here is wrong.  This might cause calling of
start_xmit routine on txfull state and trigger BUG_ON.

This bug does not happen when NAPI disabled.  After txdone there
must be at least one free tx slot.  But with NAPI, this is not
true anymore and the BUG_ON can hits on heavy load.

In this driver NAPI was enabled on 2.6.33-rc1 so this is
regression from 2.6.32 kernel.

Reported-by: Ralf Roesch <ralf.roesch@rw-gmbh.de>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agocdc_ether: new PID for Ericsson C3607w to the whitelist (resubmit)
Torgny Johansson [Fri, 19 Feb 2010 01:59:15 +0000]
cdc_ether: new PID for Ericsson C3607w to the whitelist (resubmit)

This patch adds a new vid/pid to the cdc_ether whitelist.

Device added:
- Ericsson Mobile Broadband variant C3607w

Signed-off-by: Torgny Johansson <torgny.johansson@gmail.com>

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Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agoIPv6: better document max_addresses parameter
Brian Haley [Mon, 22 Feb 2010 12:27:21 +0000]
IPv6: better document max_addresses parameter

Andrew Morton wrote:
>> >From ip-sysctl.txt file in kernel documentation I can see following description
>> for max_addresses:
>> max_addresses - INTEGER
>>         Number of maximum addresses per interface.  0 disables limitation.
>>         It is recommended not set too large value (or 0) because it would
>>         be too easy way to crash kernel to allow to create too much of
>>         autoconfigured addresses.
           ^^^^^^^^^^^^^^

>> If this parameter applies only for auto-configured IP addressed, please state
>> it more clearly in docs or rename the parameter to show that it refers to
>> auto-configuration.

It did mention autoconfigured in the text, but the below makes it more obvious.

More clearly document IPv6 max_addresses parameter.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agoMAINTAINERS: update mv643xx_eth maintenance status
Lennert Buytenhek [Mon, 22 Feb 2010 22:34:54 +0000]
MAINTAINERS: update mv643xx_eth maintenance status

I am no longer with Marvell.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agoe1000: Fix DMA mapping error handling on RX
Anton Blanchard [Fri, 19 Feb 2010 17:54:53 +0000]
e1000: Fix DMA mapping error handling on RX

Check for error return from pci_map_single/pci_map_page and clean up.

With this and the previous patch the driver was able to handle a significant
percentage of errors (I set the fault injection rate to 10% and could still
download large files at a reasonable speed).

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 years agoRevert "block: improve queue_should_plug() by looking at IO depths"
Jens Axboe [Tue, 23 Feb 2010 07:40:43 +0000]
Revert "block: improve queue_should_plug() by looking at IO depths"

This reverts commit fb1e75389bd06fd5987e9cda1b4e0305c782f854.

"Benjamin S." <sbenni@gmx.de> reports that the patch in question
causes a big drop in sequential throughput for him, dropping from
200MB/sec down to only 70MB/sec.

Needs to be investigated more fully, for now lets just revert the
offending commit.

Conflicts:

include/linux/blkdev.h

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

10 years agodrm/vmwgfx: Fix queries if no dma buffer thrashing is occuring.
Thomas Hellstrom [Sun, 21 Feb 2010 14:54:55 +0000]
drm/vmwgfx: Fix queries if no dma buffer thrashing is occuring.

Intercept query commands and apply relocations to their guest pointers.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

10 years agoMerge remote branch 'nouveau/for-airlied' of ../drm-nouveau-next into drm-linus
Dave Airlie [Tue, 23 Feb 2010 05:42:18 +0000]
Merge remote branch 'nouveau/for-airlied' of ../drm-nouveau-next into drm-linus

* 'nouveau/for-airlied' of ../drm-nouveau-next:
  drm/nv50: fix vram ptes on IGPs to point at stolen system memory
  drm/nv50: fix instmem binding on IGPs to point at stolen system memory
  drm/nv50: improve vram page table construction
  drm/nv50: more efficient clearing of gpu page table entries
  drm/nv50: make nv50_mem_vm_{bind,unbind} operate only on vram
  drm/nouveau: Fix up pre-nv17 analog load detection.

10 years agoMerge branch 'pcc' into release
Len Brown [Tue, 23 Feb 2010 05:39:00 +0000]
Merge branch 'pcc' into release

10 years agoMerge branches 'bugzilla-14207' and 'idle' into release
Len Brown [Tue, 23 Feb 2010 05:19:48 +0000]
Merge branches 'bugzilla-14207' and 'idle' into release

10 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Tue, 23 Feb 2010 03:51:39 +0000]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: BCM47xx: Fix 128MB RAM support
  MIPS: Highmem: Fix build error

10 years agoMerge branch 'parisc/tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 23 Feb 2010 03:51:13 +0000]
Merge branch 'parisc/tracehook' of git://git./linux/kernel/git/frob/linux-2.6-roland

* 'parisc/tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland:
  Revert "parisc: HAVE_ARCH_TRACEHOOK"

10 years agofs/exec.c: fix initial stack reservation
Michael Neuling [Mon, 22 Feb 2010 20:44:24 +0000]
fs/exec.c: fix initial stack reservation

803bf5ec259941936262d10ecc84511b76a20921 ("fs/exec.c: restrict initial
stack space expansion to rlimit") attempts to limit the initial stack to
20*PAGE_SIZE.  Unfortunately, in attempting ensure the stack is not
reduced in size, we ended up not changing the stack at all.

This size reduction check is not necessary as the expand_stack call does
this already.

This caused a regression in UML resulting in most guest processes being
killed.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: James Morris <jmorris@namei.org>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jouni Malinen <j@w1.fi>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoefifb: fix framebuffer handoff
Marcin Slusarz [Mon, 22 Feb 2010 20:44:22 +0000]
efifb: fix framebuffer handoff

Commit 4410f3910947dcea8672280b3adecd53cec4e85e ("fbdev: add support for
handoff from firmware to hw framebuffers") didn't add fb_destroy
operation to efifb.  Fix it and change aperture_size to match size
passed to request_mem_region.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=15151

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Reported-by: Alex Zhavnerchik <alex.vizor@gmail.com>
Tested-by: Alex Zhavnerchik <alex.vizor@gmail.com>
Acked-by: Peter Jones <pjones@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agogeode-mfgpt: restore previous behavior for selecting IRQ
Jens Rottmann [Mon, 22 Feb 2010 20:44:20 +0000]
geode-mfgpt: restore previous behavior for selecting IRQ

geode-mfgpt: restore previous behavior for selecting IRQ

The MFGPT IRQ used to be, in order of decreasing priority,
 * IRQ supplied by the user as a boot-time parameter,
 * IRQ previously set by the BIOS or another driver,
 * default IRQ given at compile time.

Return to this behavior, which got broken when splitting the
MFGPT/clocksource driver for 2.6.33-rc1.

Signed-off-by: Jens Rottmann <JRottmann@LiPPERTEmbedded.de>
Acked-by: Andres Salomon <dilinger@collabora.co.uk>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoidr: fix a critical misallocation bug, take#2
Tejun Heo [Mon, 22 Feb 2010 20:44:19 +0000]
idr: fix a critical misallocation bug, take#2

This is retry of reverted 859ddf09743a8cc680af33f7259ccd0fd36bfe9d
("idr: fix a critical misallocation bug") which contained two bugs.

* pa[idp->layers] should be cleared even if it's not used by
  sub_alloc() because it's used by mark idr_mark_full().

* The original condition check also assigned pa[l] to p which the new
  code didn't do thus leaving p pointing at the wrong layer.

Both problems have been fixed and the idr code has received good amount
testing using userland testing setup where simple bitmap allocator is
run parallel to verify the result of idr allocation.

The bug this patch fixes is caused by sub_alloc() optimization path
bypassing out-of-room condition check and restarting allocation loop
with starting value higher than maximum allowed value.  For detailed
description, please read commit message of 859ddf09.

Signed-off-by: Tejun Heo <tj@kernel.org>
Based-on-patch-from: Eric Paris <eparis@redhat.com>
Reported-by: Eric Paris <eparis@redhat.com>
Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Tested-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agokernel/sys.c: fix missing rcu protection for sys_getpriority()
Tetsuo Handa [Mon, 22 Feb 2010 20:44:16 +0000]
kernel/sys.c: fix missing rcu protection for sys_getpriority()

find_task_by_vpid() is not safe without rcu_read_lock().  2.6.33-rc7 got
RCU protection for sys_setpriority() but missed it for sys_getpriority().

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agomemcg: fix oom killing a child process in an other cgroup
KAMEZAWA Hiroyuki [Mon, 22 Feb 2010 20:44:14 +0000]
memcg: fix oom killing a child process in an other cgroup

Presently the oom-killer is memcg aware and it finds the worst process
from processes under memcg(s) in oom.  Then, it kills victim's child
first.

It may kill a child in another cgroup and may not be any help for
recovery.  And it will break the assumption users have.

This patch fixes it.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agodrm/nv50: fix vram ptes on IGPs to point at stolen system memory
Ben Skeggs [Fri, 19 Feb 2010 22:10:11 +0000]
drm/nv50: fix vram ptes on IGPs to point at stolen system memory

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

10 years agodrm/nv50: fix instmem binding on IGPs to point at stolen system memory
Ben Skeggs [Fri, 19 Feb 2010 22:06:36 +0000]
drm/nv50: fix instmem binding on IGPs to point at stolen system memory

This also modifies the unused PRAMIN PT entries to be all zeroes, can't
really recall why I used 9/0 initially, just that it didn't work for
some reason.  It was likely masking a bug elsewhere that's since been
fixed.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

10 years agodrm/nv50: improve vram page table construction
Ben Skeggs [Thu, 11 Feb 2010 01:31:44 +0000]
drm/nv50: improve vram page table construction

This commit changes nouveau to construct PTEs which look very much like
the ones the binary driver creates.

I presume that filling multiple PTEs identically with length flags and
the physical address of the start of a block of VRAM is a hint to the
memory controller that it need not perform additional page table lookups
for that range of addresses.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

10 years agodrm/nv50: more efficient clearing of gpu page table entries
Ben Skeggs [Thu, 11 Feb 2010 00:25:53 +0000]
drm/nv50: more efficient clearing of gpu page table entries

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

10 years agodrm/nv50: make nv50_mem_vm_{bind,unbind} operate only on vram
Ben Skeggs [Thu, 11 Feb 2010 00:23:30 +0000]
drm/nv50: make nv50_mem_vm_{bind,unbind} operate only on vram

GART is handled elsewhere, no reason to have the code for it here too.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

10 years agodrm/nouveau: Fix up pre-nv17 analog load detection.
Francisco Jerez [Wed, 10 Feb 2010 18:25:58 +0000]
drm/nouveau: Fix up pre-nv17 analog load detection.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

10 years agoMIPS: BCM47xx: Fix 128MB RAM support
Hauke Mehrtens [Sat, 20 Feb 2010 18:51:20 +0000]
MIPS: BCM47xx: Fix 128MB RAM support

Ignoring the last page when ddr size is 128M. Cached accesses to last page
is causing the processor to prefetch using address above 128M stepping out
of the DDR address space.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/981/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoMIPS: Highmem: Fix build error
Yoichi Yuasa [Sat, 20 Feb 2010 12:23:22 +0000]
MIPS: Highmem: Fix build error

arch/mips/mm/highmem.c: In function 'kmap_init':
arch/mips/mm/highmem.c:130: error: 'init_mm' undeclared (first use in this function)
arch/mips/mm/highmem.c:130: error: (Each undeclared identifier is reported only once
arch/mips/mm/highmem.c:130: error: for each function it appears in.)

Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/980/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

10 years agoRevert "parisc: HAVE_ARCH_TRACEHOOK"
Roland McGrath [Mon, 22 Feb 2010 18:43:43 +0000]
Revert "parisc: HAVE_ARCH_TRACEHOOK"

This reverts commit 81bf550d9cdfe0325eb1504b06c9f6511b442c1a.

HAVE_ARCH_TRACEHOOK requires defining the user_regset interfaces,
including task_user_regset_view().  parisc doesn't do that yet,
so don't lie about it.

Signed-off-by: Roland McGrath <roland@redhat.com>

10 years agoACPI: Be in TS_POLLING state during mwait based C-state entry
Pallipadi, Venkatesh [Wed, 10 Feb 2010 18:35:31 +0000]
ACPI: Be in TS_POLLING state during mwait based C-state entry

ACPI deep C-state entry had a long standing bug/missing feature, wherein we were sending
resched IPIs when an idle CPU is in mwait based deep C-state. Only mwait based C1 was using
the write to the monitored address to wake up mwait'ing CPU.

This patch changes the code to retain TS_POLLING bit if we are entering an mwait based
deep C-state.

The patch has been verified to reduce the number of resched IPIs in general and also
improves the performance/power on workloads with low system utilization (i.e., when mwait based
deep C-states are being used).

Fixes "netperf ~50% regression with 2.6.33-rc1, bisect to 1b9508f"
http://marc.info/?l=linux-kernel&m=126441481427331&w=4

Reported-by: Lin Ming <ming.m.lin@intel.com>
Tested-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

10 years agoMerge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 22 Feb 2010 16:55:32 +0000]
Merge branch 'perf-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf probe: Init struct probe_point and set counter correctly
  hw-breakpoint: Keep track of dr7 local enable bits
  hw-breakpoints: Accept breakpoints on NULL address
  perf_events: Fix FORK events

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Mon, 22 Feb 2010 16:48:06 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: usbtouchscreen - extend coordinate range for Generaltouch devices
  Input: polldev can cause crash in case when polling disabled

10 years agoi915 / PM: Fix hibernate regression caused by suspend/resume splitting
Rafael J. Wysocki [Thu, 18 Feb 2010 22:06:27 +0000]
i915 / PM: Fix hibernate regression caused by suspend/resume splitting

Commit 84b79f8d2882b0a84330c04839ed4d3cefd2ff77 (drm/i915: Fix crash
while aborting hibernation) attempted to fix a regression introduced
by commit cbda12d77ea590082edb6d30bd342a67ebc459e0 (drm/i915:
implement new pm ops for i915), but it went too far trying to split
the freeze/suspend and resume/thaw parts of the code.  As a result,
it introduced another regression, which only is visible on some systems.

Fix the problem by merging i915_drm_suspend() with
i915_drm_freeze() and moving some code from i915_resume()
into i915_drm_thaw(), so that intel_opregion_free() and
intel_opregion_init() are also executed in the freeze and thaw code
paths, respectively.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reported-and-tested-by: Pedro Ribeiro <pedrib@gmail.com>
Tested-by: Tino Keitel <tino.keitel@tikei.de>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

10 years agoiwlwifi: sanity check before counting number of tfds can be free
Stanislaw Gruszka [Fri, 19 Feb 2010 23:47:33 +0000]
iwlwifi: sanity check before counting number of tfds can be free

Check the frame control for ieee80211_is_data_qos() is true before
counting the number of tfds can be free, the tfds_in_queue only
increment when ieee80211_is_data_qos() is true before transmit; so it
should only decrement if the type match.

Remove ieee80211_is_data_qos check for frame_ctrl in tx_resp to avoid
invalid information pass from uCode.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
CC: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>