Use consistent format for comments and get rid of some unnecessary
comments.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Enable build of ramster as a staging driver
Signed-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

New files for ramster support:  The file ramster.h declares externs
and some pampd bitfield manipulation.  The file zcache.h declares
some zcache functions that now must be accessed from the ramster
glue code.  The file ramster_o2net.c is the glue between
zcache and the o2net messaging code, providing routines called
from zcache that initiate messages, and routines that handle
messages by calling zcache. TODO explains future plans for merging.
Signed-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

In tmem.[ch], new "repatriate" (provoke async get) and "localify" (handle
incoming data resulting from an async get) routines combine with a handful
of changes to existing pamops interfaces allow the generic tmem code
to support asynchronous operations.  Also, a new tmem_xhandle struct
groups together key information that must be passed to remote tmem stores.

Zcache-main.c is augmented with a large amount of ramster-specific code
to handle remote operations and "foreign" pages on both ends of the
"remotify" protocol.  New "foreign" pools are auto-created on demand.
A "selfshrinker" thread periodically repatriates remote persistent pages
when local memory conditions allow.  For certain operations, a queue is
necessary to guarantee strict ordering as out-of-order puts/flushes can
cause strange race conditions.  Pampd pointers now either point to local
memory OR describe a remote page; to allow the same 64-bits to describe
either, the LSB is used to differentiate.  Some acrobatics must be performed
to ensure local memory is available to handle a remote persistent get,
or deal with the data directly anyway if the malloc failed.  Lots
of ramster-specific statistics are available via sysfs.

Note: Some debug ifdefs left in for now.
Signed-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Ramster-specific changes to ocfs2 cluster foundation, including:
A method for fooling the o2 heartbeat into starting without
an ocfs2 filesystem; a new message mechanism ("data magic") for handling
a reply to a message requesting data; a hack for keeping the cluster
alive even after timeouts so cluster machines can be rebooted separately.
Signed-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Copy files from drivers/staging/zcache.  Ramster compresses pages
locally before transmitting them to another node, so we can
leverage the zcache and tmem code directly.  Note: there are
no ramster-specific changes yet to these files.

(Why copy?  The ramster tmem.c/tmem.h changes are definitely shareable
between zcache and ramster; the eventual destination for tmem.c
is the linux lib directory.  Ramster changes to zcache are more substantial
and zcache is currently undergoing some significant unrelated changes
(including a new allocator and breaking zcache-main.c into smaller files),
so it seemed best to branch temporarily and merge later.)
Signed-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Copy cluster subdirectory from ocfs2.  These files implement
the basic cluster discovery, mapping, heartbeat / keepalive, and
messaging ("o2net") that ramster requires for internode communication.
Note: there are NO ramster-specific changes yet; this commit
does NOT pass checkpatch since the copied source files do not.

(Why copy?  This particular part of ocfs2 has never been broken out
for non-ocfs2 use before, some (small) changes are required for ramster
to use that code, and ramster is currently incompatible with real
ocfs2 anyway (requires !CONFIG_OCFS2_FS).  Before ramster can be promoted
out of staging, we will need to work with the ocfs2 maintainers to
see if the code interdependencies can be merged, but for now, for
staging, this seemed to be an expedient way to make use of the ocfs2
core cluster code while still incorporating necessary changes for ramster.)
Signed-off-by: NDan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Correct spelling "reseting" to "resetting" in
drivers/staging/mei/interrupt.c
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This stuff is really old and in quite poor shape.
Does anyone still use it?

If not, I think it's appropriate to let it simmer
in staging for a few releases.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

LMK should not try killing kernel threads.
Suggested-by: NOleg Nesterov <oleg@redhat.com>
Reviewed-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: NKOSAKI Motohiro <kosaki.motohiro@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

task->signal == NULL is not possible, so no need for these checks.
Suggested-by: NOleg Nesterov <oleg@redhat.com>
Reviewed-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: NKOSAKI Motohiro <kosaki.motohiro@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

LMK should not directly check for task->mm. The reason is that the
process' threads may exit or detach its mm via use_mm(), but other
threads may still have a valid mm. To catch this we use
find_lock_task_mm(), which walks up all threads and returns an
appropriate task (with lock held).
Suggested-by: NOleg Nesterov <oleg@redhat.com>
Reviewed-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: NKOSAKI Motohiro <kosaki.motohiro@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Grabbing tasklist_lock has its disadvantages, i.e. it blocks
process creation and destruction. If there are lots of processes,
blocking doesn't sound as a great idea.

For LMK, it is sufficient to surround tasks list traverse with
rcu_read_{,un}lock().

>From now on using force_sig() is not safe, as it can race with an
already exiting task, so we use send_sig() now. As a downside, it
won't kill PID namespace init processes, but that's not what we
want anyway.
Suggested-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org>
Reviewed-by: NOleg Nesterov <oleg@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add comment to explain when w_off is not updated in case of failed second
fragment copy to buffer.
Signed-off-by: NTim Bird <tim.bird@am.sony.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add commentary, rename the function and make the code easier to read.
Signed-off-by: NTim Bird <tim.bird@am.sony.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

If mutex_lock waits, it will return in state TASK_RUNNING,
rubbing out the effect of prepare_to_wait().
Signed-off-by: NTim Bird <tim.bird@am.sony.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Make this code slightly easier to read, and eliminate calls
to sub-routines.  Some of these were previously optimized away
by the compiler, but one memcpy was not.

In my testing, this makes the code about 20% smaller, and
has no sub-routine calls and no branches (on ARM).

v2 of this patch is, IMHO, easier to read than v1. Compared to
that patch it uses __u8 instead of unsigned char, for
consistency with the __u16 val data type, simplifies the
conditional expression, adds a another comment, and
moves a common statement out of the if.
Signed-off-by: NTim Bird <tim.bird@am.sony.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Convert to function and add log as a parameter, rather than relying
on log in the context of the macro.
Signed-off-by: NTim Bird <tim.bird@am.sony.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Just made it more neat and not bother scripts/checkpatch.pl
Signed-off-by: NTracey Dent <tdent48227@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Minor cleanups that consist of removal of a whitespace and
make file_operations const.
Signed-off-by: NTracey Dent <tdent48227@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The semantic patch that makes this change is available
in scripts/coccinelle/api/resource_size.cocci.

More information about semantic patching is available at
http://coccinelle.lip6.fr/Signed-off-by: NThomas Meyer <thomas@m3y3r.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Below is a patch that fixes some typos in some comments.
Signed-off-by: NJustin P. Mattock <justinmattock@gmail.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Replace kmalloc + memcpy will kmemdup in ram_console_late_init
Signed-off-by: NGreg Dietsche <Gregory.Dietsche@cuw.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

nvec modules do not require other stuff to be build in,
nor does nvec_ps2 require mouse support, only generic
serio support.
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This saves us some calls and thus makes the code shorter
and nicer.
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The constant I2C_SL_NEWL meant "new slave", but the
S was missing.
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This changes the serio type of the nvec_ps2 mouse port to passthrough.
The old 8042 type seems appropiete for keyboards only.
Signed-off-by: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This change makes the touchpad buttons work after suspend/resume.
Signed-off-by: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This can print the mouse traffic which goes over the i2c bus. Make
mouse debugging messages configurable and disable them by default.
Signed-off-by: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This packet size used on most modern touchpads. Ideally, this should
be configurable or autodetected.
Signed-off-by: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

staging: nvec: ps2: let the start/stop streaming commands be called by the start/stop functions of serio

Instead of executing these commands during open/close, the start/stop
event of the serio device seem to be more appropiete.
Signed-off-by: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This adds suspend and resume functions to the nvec_ps2 mouse driver.

During suspend the nvec sends a "Cancel all mouse events" command. If
this is missed, there will be still some bytes in the received buffer
after resume which make the mouse go out of sync.
Signed-off-by: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NJulian Andres Klode <jak@jak-linux.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This is basically a rewrite so there isn't a nice easy to present way of
providing this as a patch series. This patch is a pull of Mark's new driver into
the upstream staging area. On top of that are a series of patches by
Andy Shevchenko to make it build on the current tree, fix a few things and
even get it passed sparse.

The new driver supports the kernel crypto layer, passes the coding style checks,
passes human taste checks and has proper kernel-doc formatted comments.

I've then folded back in some later fixes it was missing that got applied to
to the kernel tree.

This should be ready for more serious review with a view to migration from
the staging tree shortly.
Signed-off-by: NMark Allyn <mark.a.allyn@intel.com>
[Forward port and some bug fixing]
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
[Fold and tweaks for 3.2]
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Merge branches 'sched-urgent-for-linus', 'perf-urgent-for-linus' and 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/accounting, proc: Fix /proc/stat interrupts sum

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tracepoints/module: Fix disabling tracepoints with taint CRAP or OOT
  x86/kprobes: Add arch/x86/tools/insn_sanity to .gitignore
  x86/kprobes: Fix typo transferred from Intel manual

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, syscall: Need __ARCH_WANT_SYS_IPC for 32 bits
  x86, tsc: Fix SMI induced variation in quick_pit_calibrate()
  x86, opcode: ANDN and Group 17 in x86-opcode-map.txt
  x86/kconfig: Move the ZONE_DMA entry under a menu
  x86/UV2: Add accounting for BAU strong nacks
  x86/UV2: Ack BAU interrupt earlier
  x86/UV2: Remove stale no-resources test for UV2 BAU
  x86/UV2: Work around BAU bug
  x86/UV2: Fix BAU destination timeout initialization
  x86/UV2: Fix new UV2 hardware by using native UV2 broadcast mode
  x86: Get rid of dubious one-bit signed bitfield

gpio bug fixes for v3.3

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  gpio: tps65910: Use correct offset for gpio initialization
  gpio/it8761e: Restrict it8761e gpio driver to x86.
  gpio-ml-ioh: cleanup __iomem annotation usage
  gpio-ml-ioh: cleanup NULL pointer checking
  gpio-pch: cleanup __iomem annotation usage
  gpio-pch: cleanup NULL pointer checking

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  qnx4: don't leak ->BitMap on late failure exits
  qnx4: reduce the insane nesting in qnx4_checkroot()
  qnx4: di_fname is an array, for crying out loud...
  vfs: remove printk from set_nlink()
  wake up s_wait_unfrozen when ->freeze_fs fails

In checkin

  303395ac x86: Generate system call tables and unistd_*.h from tables

the feature macros in <asm/unistd.h> were unified between 32 and 64
bits.  Unfortunately 32 bits requires __ARCH_WANT_SYS_IPC and this was
inadvertently dropped.
Reported-by: NDmitry Kasatkin <dmitry.kasatkin@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/CALLzPKbeXN5gdngo8uYYU8mAow=XhrwBFBhKfG811f37BubQOg@mail.gmail.com