Forward port of ashmem to 2.6.27.
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>
Conflicts:
include/linux/mm.h
mm/Makefile
mm/shmem.c
Signed-off-by: Rebecca Schultz <rschultz@google.com>
pmem: Use the thread group leader insted of the current thread.
Instead of keeping track of the current thread, use the thread group leader
Signed-off-by: Rebecca Schultz <rschultz@google.com>
pmem: Add some apis to reference and flush pmem files by file struct
The api to refer to pmem files by fd should be depricated, it can
cause problems if a processes fd table changes while the kernel is processing
data in a pmem file. This change adds the safer api.
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
pmem: Remove unused depricated fd api to pmem.
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
pmem: Remove error message when calling get_pmem_addr
This call is used from the mdp driver to determine if the memory
is in pmem or in the fb. We will encounter this case during normal operation
so this error message should be removed.
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
pmem: Add include sched.h to fix compile errors
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
pmem: remove HW3D_* ioctls
Signed-off-by: Dima Zavin <dima@android.com>
pmem: Expose is_pmem_file to the in-kernel users.
Signed-off-by: Dima Zavin <dima@android.com>
pmem: Make the exposed functions be noops if CONFIG_ANDROID_PMEM is not set.
Signed-off-by: Dima Zavin <dima@android.com>
misc: pmem: don't flush if file was opened with O_SYNC
Change-Id: I067218658a0d7f7ecc1fe73e9ff6b0c3b3054653
Signed-off-by: Dima Zavin <dima@android.com>
pmem: Add cache flush ioctl for pmem buffers
Change-Id: I9156bad829e8c65087f122b48cc57638902fab12
Signed-off-by: Dima Zavin <dima@android.com>
Allow multiple pmem master mmap()s.
Signed-off-by: Jamie Gennis <jgennis@google.com>
Change-Id: Icbe619c92e0ebb391f0a93f81937705452a67d87
pmem: convert data_list_sem to a mutex
Also rename a function that now conflicts with a new
define in asm/pgtable.h
Change-Id: I4798048cb8dece1bc03604e7d0b03d86e0c0ef7f
Signed-off-by: Dima Zavin <dima@android.com>
Conflicts:
drivers/misc/Kconfig
drivers/misc/Makefile
When connecting usb or the charger the device would often go back to sleep
before the charge led and screen turned on.
Change-Id: I01def6d86ddece0d4e31d2a91d176ed0975b6b9d
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Conflicts:
drivers/power/power_supply_core.c
Drivers can now create alarms that will use an hrtimer while the
system is running and the rtc to wake up from suspend.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
siihdmi: don't reconfigure the SII9022 just because there was a mode change if the mode is identical
ipuv3fb: default to a real 640x480 mode and not a "dummy" xres/yres
modedb: move cea modes to an extern so it only gets included once in the kernel
also: whitespace police
Added padding of 64 bytes (cache line size for Cortex-A8) around
buffers that are used by the hardware to prevent any cache
coherency problems that could arise if buffers share a cache line
with some other data that is used by the CPU.
Signed-off-by: Anish Trivedi <anish@freescale.com>
The user mode libsahara library relied on header file
drivers/mxc/security/sahara2/include/sahara.h. However, to make
the lib build after headers_install step and to remove dependency on
kernel source, moved this header to include/linux/mxc_sahara.h.
These changes are specific to the include/linux folder.
Signed-off-by: Anish Trivedi <anish@freescale.com>
Acked-by: Lily Zhang
If you disable display, the display port's pin may keep high voltage which
may cause power leakage. Fix this issue by make all pin go into low level
after display disable.
Signed-off-by: Jason Chen <b02280@freescale.com>
(cherry picked from commit 165df9e8d525082e70a165516e2bcd1d0529b148)
The intent is that if you have a native panel resolution of 1920x1080@60 but this cannot
be displayed, you can find the nearest resolution with the HIGHEST refresh rate (fb_find_nearest_mode
only selects the CLOSEST refresh rate). It also, by virtue of some rather unintended
side effect, picks better matches (1680x1050->1440x900) than find_nearest (1680x1050->1280x1024)
when it comes to widescreen modes.
Change ipu_check_buffer_busy to ipu_check_buffer_ready.
Signed-off-by: Jason Chen <b02280@freescale.com>
(cherry picked from commit 6a0f0935318eac8733f79964854d2c18fe012099)
There's a long-running regression that proved difficult to fix and
which is hitting certain people and is rather annoying in its effects.
Damien reported that after 74f5187ac8 (sched: Cure load average vs
NO_HZ woes) his load average is unnaturally high, he also noted that
even with that patch reverted the load avgerage numbers are not
correct.
The problem is that the previous patch only solved half the NO_HZ
problem, it addressed the part of going into NO_HZ mode, not of
comming out of NO_HZ mode. This patch implements that missing half.
When comming out of NO_HZ mode there are two important things to take
care of:
- Folding the pending idle delta into the global active count.
- Correctly aging the averages for the idle-duration.
So with this patch the NO_HZ interaction should be complete and
behaviour between CONFIG_NO_HZ=[yn] should be equivalent.
Furthermore, this patch slightly changes the load average computation
by adding a rounding term to the fixed point multiplication.
Reported-by: Damien Wyart <damien.wyart@free.fr>
Reported-by: Tim McGrath <tmhikaru@gmail.com>
Tested-by: Damien Wyart <damien.wyart@free.fr>
Tested-by: Orion Poplawski <orion@cora.nwra.com>
Tested-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: stable@kernel.org
Cc: Chase Douglas <chase.douglas@canonical.com>
LKML-Reference: <1291129145.32004.874.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This patch introduces a new flag SCHED_RESET_ON_FORK which can be passed
to the kernel via sched_setscheduler(), ORed in the policy parameter. If
set this will make sure that when the process forks a) the scheduling
priority is reset to DEFAULT_PRIO if it was higher and b) the scheduling
policy is reset to SCHED_NORMAL if it was either SCHED_FIFO or SCHED_RR.
Why have this?
Currently, if a process is real-time scheduled this will 'leak' to all
its child processes. For security reasons it is often (always?) a good
idea to make sure that if a process acquires RT scheduling this is
confined to this process and only this process. More specifically this
makes the per-process resource limit RLIMIT_RTTIME useful for security
purposes, because it makes it impossible to use a fork bomb to
circumvent the per-process RLIMIT_RTTIME accounting.
This feature is also useful for tools like 'renice' which can then
change the nice level of a process without having this spill to all its
child processes.
Why expose this via sched_setscheduler() and not other syscalls such as
prctl() or sched_setparam()?
prctl() does not take a pid parameter. Due to that it would be
impossible to modify this flag for other processes than the current one.
The struct passed to sched_setparam() can unfortunately not be extended
without breaking compatibility, since sched_setparam() lacks a size
parameter.
How to use this from userspace? In your RT program simply replace this:
sched_setscheduler(pid, SCHED_FIFO, ¶m);
by this:
sched_setscheduler(pid, SCHED_FIFO|SCHED_RESET_ON_FORK, ¶m);
Signed-off-by: Lennart Poettering <lennart@poettering.net>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090615152714.GA29092@tango.0pointer.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
(cherry picked from commit ca94c442535a44d508c99a77e54f21a59f4fc462)
Add parsing of E-EDID SVD entries. In this first version only a few
CEA/EIA-861E modes are implemented, more can be added as needed.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Modern monitors/tvs have more extended EDID information blocks which can
contain extra detailed modes. This adds a fb_edid_add_monspecs function
which drivers can use to parse those additions blocks.
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
