The anonymous shared memory (ashmem) subsystem provides a
Unix-y,file-based shared memory interface to user-space. It
works like anonymous memory (e.g. mmapping fd=0) except if
you share the file descriptor via the usual means, you will
share the mapping. The shared memory can be accessed via both
mmap or file I/O. The backing store is a simple shmem file.
Additionally, ashmem introduces the concept of page pinning.
Pinned pages (the default) behave like any anonymous memory.
Unpinned pages are available to the kernel for eviction during
VM pressure. When repinning the pages, the return value
instructs user-space as to any eviction. In this manner,
user-space processes may implement caching and similar
resource management that efficiently integrates with kernel
memory management.
Signed-off-by: Robert Love <rlove@google.com>
ashmem: Don't install fault handler for private mmaps.
Ashmem is used to create named private heaps. If this heap is backed
by a tmpfs file it will allocate two pages for every page touched.
In 2.6.27, the extra page would later be freed, but 2.6.29 does not
scan anonymous pages when running without swap so the memory is not
freed while the file is referenced. This change changes the behavior
of private ashmem mmaps to match /dev/zero instead tmpfs.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
ashmem: Add common prefix to name reported in /proc/pid/maps
Signed-off-by: Arve Hjønnevåg <arve@android.com>
ashmem: don't require a page aligned size
This makes ashmem more similar to shmem and mmap, by
not requiring the specified size to be page aligned,
instead rounding it internally as needed.
Signed-off-by: Marco Nelissen <marcone@android.com>
[jstultz: Improved commit subject and included patch description
from rlove. Also moved ashmem files to staging dir, and reworked
code to avoid touching mm/shmem.c while we're in staging.]
CC: Brian Swetland <swetland@google.com>
CC: Colin Cross <ccross@android.com>
CC: Arve Hjønnevåg <arve@android.com>
CC: Dima Zavin <dima@android.com>
CC: Robert Love <rlove@google.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Right now just a tiler_map file to dump a 2d map of which areas in
tiler/dmm have pinned buffers (or reservations). In the future more
could be added.
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
omap_gem_roll() could be called by fbcon in atomic context or when
struct_mutext is held. Avoid aquiring mutex (deadlock), or calling
tiler_pin() (which itself is not safe for atomic context) in these
cases.
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Can be set at boot or module load time to prevent YWRAP scrolling from
being enabled.
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The rtllib and rtllib_crypt drivers are both required for a fully
functional rtllib. Make sure both are always available by having
rtllib select rtllib_crypt.
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Sean MacLennan <seanm@seanm.ca>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This field moved into the trigger_ops structure a while back, but somehow
never quite got cleared up. This clears the last few drivers to set it
(nothing uses it) and gets rid of it entirely.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The core needs the owner field to prevent module removal whilst in use and
uses it without confirming that the trigger_ops structure actually exists.
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Add missing scale attributes.
Temperature data is presented as 10-bit, twos complement number.
Therefore use singed and shift accordingly.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Changed whitespaces in comedi/*.c to tabs where necessary. All .c
files within comedi now have no obvious style problems as reported by
checkpatch.pl
Signed-off-by: Florian Schmaus <fschmaus@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch fixes some space-before-tabs warnings found by checkpatch tool on the staging android driver file logger.c
Signed-off-by: Marco Navarra <fromenglish@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This is a patch to the contec_pci_dio.c file that fixes up a
printk warning found by the checkpatch.pl tool.
Converted printks to dev_dbg().
Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankar.km@greenturtles.in>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This is a patch to the das1800.c file that fixes up a
printk warning found by the checkpatch.pl tool.
Converted printk to dev_<levels>.
Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankar.km@greenturtles.in>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This is a patch to the das1800.c file that fixes up a
printk warning found by the checkpatch.pl tool.
Included KERN_facility levels for printk.
Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankar.km@greenturtles.in>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This is a patch to the cb_pcidas64.c file that fixes up a
printk warning found by the checkpatch.pl tool.
Converted printks to dev_<levels> and Removed unnecessary
printk statements.
Signed-off-by: Ravishankar Karkala Mallikarjunayya <ravishankar.km@greenturtles.in>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Colin Cross
Bjorn Bringert
Colin Cross
Arve Hjønnevåg
Robert Love
Rebecca Schultz
Greg Kroah-Hartman
Mike Lockwood
Andy Gross
Rob Clark
Sean MacLennan
Jonathan Cameron
Michael Hennerich
Florian Schmaus
Jorgyano Vieira
Marco Navarra
Ravishankar karkala Mallikarjunayya