04 Jul, 2013
2 commits
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Merge first patch-bomb from Andrew Morton:
- various misc bits
- I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been
distracted. There has been quite a bit of activity.
- About half the MM queue
- Some backlight bits
- Various lib/ updates
- checkpatch updates
- zillions more little rtc patches
- ptrace
- signals
- exec
- procfs
- rapidio
- nbd
- aoe
- pps
- memstick
- tools/testing/selftests updates* emailed patches from Andrew Morton : (445 commits)
tools/testing/selftests: don't assume the x bit is set on scripts
selftests: add .gitignore for kcmp
selftests: fix clean target in kcmp Makefile
selftests: add .gitignore for vm
selftests: add hugetlbfstest
self-test: fix make clean
selftests: exit 1 on failure
kernel/resource.c: remove the unneeded assignment in function __find_resource
aio: fix wrong comment in aio_complete()
drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode
drivers/memstick/host/r592.c: convert to module_pci_driver
drivers/memstick/host/jmb38x_ms: convert to module_pci_driver
pps-gpio: add device-tree binding and support
drivers/pps/clients/pps-gpio.c: convert to module_platform_driver
drivers/pps/clients/pps-gpio.c: convert to devm_* helpers
drivers/parport/share.c: use kzalloc
Documentation/accounting/getdelays.c: avoid strncpy in accounting tool
aoe: update internal version number to v83
aoe: update copyright date
aoe: perform I/O completions in parallel
... -
Calling dev_set_name with a single paramter causes it to be handled as a
format string. Many callers are passing potentially dynamic string
content, so use "%s" in those cases to avoid any potential accidents,
including wrappers like device_create*() and bdi_register().Signed-off-by: Kees Cook
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Jun, 2013
6 commits
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Dependencies on CPU_EXYNOS4212 and CPU_EXYNOS4412 for the "ARM
Exynos4210/4212/4412 Memory Bus DEVFREQ Driver" were added in commit
7b4050381127ae11fcfc74a106d715a5fbbf888a ("PM/Devfreq: Add Exynos4-bus
device DVFS driver for Exynos4210/4212/4412."). The tree (at that time,
v3.3, and currently) makes clear that this should have been dependencies
on SOC_EXYNOS4212 and SOC_EXYNOS4412.Signed-off-by: Paul Bolle
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Add the missing unlock before return from function
exynos4_busfreq_pm_notifier_event() in the error
handling case.This issue introduced by commit 8fa938
(PM / devfreq: exynos4_bus: honor RCU lock usage)Signed-off-by: Wei Yongjun
[Resolved path conflicts by MyungJoo Ham]
Signed-off-by: MyungJoo Ham -
- Added missing ABI documents
- Added comments to clarify the objectives of functionsSigned-off-by: MyungJoo Ham
Acked-by: Nishanth Menon
Acked-by: Rajagopal Venkat -
devfreq stats is not taking device suspend and resume into
account. Fix it.Signed-off-by: Rajagopal Venkat
Acked-by: MyungJoo Ham -
Exynos5-bus device devfreq driver monitors PPMU counters and
adjusts operating frequencies and voltages with OPP. ASV should
be used to provide appropriate voltages as per the speed group
of the SoC rather than using a constant 1.025V.Signed-off-by: Abhilash Kesavan
[myungjoo.ham@samsung.com: minor style update]
Signed-off-by: MyungJoo Ham
Cc: Jonghwan Choi
Cc: Kukjin Kim -
In anticipation of the new exynos5 devfreq and ppmu driver, create
an exynos sub-directory. Move the existing exynos4 devfreq driver
into the same.Signed-off-by: Abhilash Kesavan
Acked-by: MyungJoo Ham
Cc: Jonghwan Choi
Cc: Kukjin Kim
29 Jan, 2013
1 commit
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Conflicts:
drivers/devfreq/exynos4_bus.cSync with Linus' tree to be able to apply patches that are
against newer code (mvneta).
22 Jan, 2013
2 commits
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OPP pointers cannot be expected to be valid beyond the boundary
of rcu_read_lock and rcu_read_unlock. Unfortunately, the current
exynos4 busfreq driver does not honor the usage constraint and stores
the OPP pointer in struct busfreq_data. This could potentially
become invalid later such as: across devfreq opp change decisions,
resulting in unpredictable behavior.To fix this, we introduce a busfreq specific busfreq_opp_info
structure which is used to handle OPP information. OPP information
is de-referenced to voltage and frequency pairs as needed into
busfreq_opp_info structure and used as needed.Signed-off-by: Nishanth Menon
Signed-off-by: Rafael J. Wysocki -
OPP pointers are protected by RCU locks, the pointer validity is
permissible only under the section of rcu_read_lock to rcu_read_unlockAdd documentation to the effect.
Signed-off-by: Nishanth Menon
Signed-off-by: Rafael J. Wysocki
09 Jan, 2013
1 commit
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Correct spelling typo in printk within various drivers.
Signed-off-by: Masanari Iida
Signed-off-by: Jiri Kosina
04 Jan, 2013
1 commit
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CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.Cc: Bill Pemberton
Signed-off-by: Greg Kroah-Hartman
08 Dec, 2012
1 commit
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* pm-devfreq: (23 commits)
PM / devfreq: remove compiler error with module governors (2)
PM / devfreq: Fix return value in devfreq_remove_governor()
PM / devfreq: Fix incorrect argument in error message
PM / devfreq: missing rcu_read_lock() added for find_device_opp()
PM / devfreq: remove compiler error when a governor is module
PM / devfreq: exynos4_bus.c: Fixed an alignment of the func call args.
PM / devfreq: Add sysfs node to expose available governors
PM / devfreq: allow sysfs governor node to switch governor
PM / devfreq: governors: add GPL module license and allow module build
PM / devfreq: map devfreq drivers to governor using name
PM / devfreq: register governors with devfreq framework
PM / devfreq: provide hooks for governors to be registered
PM / devfreq: export update_devfreq
PM / devfreq: Add sysfs node for representing frequency transition information.
PM / devfreq: Add sysfs node to expose available frequencies
PM / devfreq: documentation cleanups for devfreq header
PM / devfreq: Use devm_* functions in exynos4_bus.c
PM / devfreq: make devfreq_class static
PM / devfreq: fix sscanf handling for writable sysfs entries
PM / devfreq: kernel-doc typo corrections
...
29 Nov, 2012
1 commit
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Governors compiled as modules may use these functions.
Signed-off-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki
26 Nov, 2012
3 commits
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Use the value obtained from the function instead of -EINVAL.
Signed-off-by: Sachin Kamat
Signed-off-by: MyungJoo Ham -
'g' is cast to the error return code. Hence gives the following error
which is fixed by this patch.drivers/devfreq/devfreq.c:645 devfreq_remove_governor() error:
'g' dereferencing possible ERR_PTR()Signed-off-by: Sachin Kamat
Signed-off-by: MyungJoo Ham -
opp_get_notifier() uses find_device_opp(), which requires to
held rcu_read_lock. In order to keep the notifier-header
valid, we have added rcu_read_lock().Reported-by: Kees Cook
Signed-off-by: MyungJoo Ham
20 Nov, 2012
11 commits
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I fixed the following check item (via checkpatch.pl --strict option):
CHECK: Alignment should match open parenthesisSigned-off-by: Sangho Yi
[Merge conflict resolved]
Signed-off-by: MyungJoo Ham -
Now that governor list can be variable, knowing the available governors
is useful to be able to select a governor using relevant sysfs node.Cc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
Signed-off-by: MyungJoo Ham -
This allows us to select governor runtime from the
default configuration without having to rebuild kernel
or the devfreq driver using the sysfs node:
/sys/class/devfreq/.../governor
cat of the governor will return valid governor
and an echo 'governor_name'>governor will switch
governorCc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
Acked-by: MyungJoo Ham
Signed-off-by: MyungJoo Ham -
Add GPL module license and remove the static build
restrictions for building governors. This allows governors now
to be loaded on a need basis and reloaded independently of kernel
buildCc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
Acked-by: MyungJoo Ham
Signed-off-by: MyungJoo Ham -
Allow devfreq drivers to register a preferred governor name
and when the devfreq governor loads itself at a later point
required drivers are managed appropriately, at the time of
unload of a devfreq governor, stop managing those drivers
as well.Since the governor structures do not need to be exposed
anymore, remove the definitions and make them staticNOTE: devfreq_list_lock is now used to protect governor
start and stop - as this allows us to protect governors and
devfreq with the proper dependencies as needed.As part of this change, change the registration of exynos
bus driver to request for ondemand using the governor name.Cc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
[Merge conflict resolved by MyungJoo Ham]
Signed-off-by: MyungJoo Ham -
With the new registration functions, governors can be now
registered with devfreq framework.NOTE: generates 'discards qualifiers from pointer target type'
build warnings, which the next patche in this series fixesCc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
Acked-by: MyungJoo Ham
Signed-off-by: MyungJoo Ham -
Add devfreq_add_governor and devfreq_remove_governor which
can be invoked by governors to register with devfreq.This sets up the stage to dynamically switch governors and
allow governors to be dynamically loaded as well.Cc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
Acked-by: MyungJoo Ham -
Allow update_devfreq to be used by devfreq governor built
as modulesCc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
Acked-by: MyungJoo Ham
Signed-off-by: MyungJoo Ham -
This patch adds sysfs node which can be used to get information of frequency
transition. It represents transition table which contains total number of transition of
each freqeuncy state and time spent. It is inspired CPUFREQ's status driver.Signed-off-by: Jonghwa Lee
[Added Documentation/ABI entry, updated kernel-doc, and resolved merge conflict]
Signed-off-by: MyungJoo Ham -
devfreq governors such as ondemand are controlled by a min and
max frequency, while governors like userspace governor allow us
to set a specific frequency.
However, for the same specific device, depending on the SoC, the
available frequencies can vary.So expose the available frequencies as a snapshot over sysfs to
allow informed decisions.This was inspired by cpufreq framework's equivalent for similar
usage sysfs node: scaling_available_frequencies.Cc: Rajagopal Venkat
Cc: MyungJoo Ham
Cc: Kyungmin Park
Cc: "Rafael J. Wysocki"
Cc: Kevin Hilman
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.orgSigned-off-by: Nishanth Menon
Signed-off-by: MyungJoo Ham -
devm_* functions are device managed functions and make cleanup code
simpler and smaller.
devm_kzalloc and devm_regulator_get functions are used.Signed-off-by: Sachin Kamat
[renamed the patch title by MyungJoo Ham]
Signed-off-by: MyungJoo Ham
15 Nov, 2012
7 commits
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Currently the opp_find* functions return -ENODEV when:
a) it cant find a device (e.g. request for an OPP search on device
which was not registered)
b) When it cant find a match for the search strategy usedThis makes life a little in-efficient for users such as devfreq
to make reasonable judgement before switching search strategies.So, standardize the return results as following:
-EINVAL for bad pointer parameters
-ENODEV when device cannot be found
-ERANGE when search failsThis has the following benefit for devfreq implementation:
The search fails when an unregistered device pointer is provided.
This is a trigger to change the search direction and search for
a better fit, however, if we cannot differentiate between a valid
search range failure Vs an unregistered device, second search goes
through the same fail return condition. This can be avoided by
appropriate handling of error return code.With this change, we also fix devfreq for the improved search
strategy with updated error code.Signed-off-by: Nishanth Menon
Reviewed-by: Kevin Hilman
Acked-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki -
devfreq_class is used internally by devfreq and has no
need to be globally available.This also fixes the following sparse warning:
drivers/devfreq/devfreq.c:30:14: warning: symbol 'devfreq_class' was not declared. Should it be static?Signed-off-by: Nishanth Menon
Signed-off-by: Rafael J. Wysocki -
sscanf returns 0 when an invalid parameter like:
echo -n "a">min_freq
is attempted. Returning back the return result(0) will
cause the command not to return back to command
prompt.Instead, just return -EINVAL when sscanf does not
return 1.This is done for min_freq, max_freq and polling_interval
Signed-off-by: Nishanth Menon
Acked-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki -
Parameter documentation needs a ':' for scripts/kernel-doc
to parse properly.Minor fixes for ones warned by:
./scripts/kernel-doc -text drivers/devfreq/devfreq.c>/dev/nullSigned-off-by: Nishanth Menon
Acked-by: Randy Dunlap
Acked-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki -
Devfreq returns governor predicted frequency as current frequency
via sysfs interface. But device may not support all frequencies
that governor predicts. So add a callback in device profile to get
current freq from driver. Also add a new sysfs node to expose
governor predicted next target frequency.Signed-off-by: Rajagopal Venkat
Acked-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki -
Add devfreq suspend/resume apis for devfreq users. This patch
supports suspend and resume of devfreq load monitoring, required
for devices which can idle.Signed-off-by: Rajagopal Venkat
Acked-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki -
Prepare devfreq core framework to support devices which
can idle. When device idleness is detected perhaps through
runtime-pm, need some mechanism to suspend devfreq load
monitoring and resume back when device is online. Present
code continues monitoring unless device is removed from
devfreq core.This patch introduces following design changes,
- use per device work instead of global work to monitor device
load. This enables suspend/resume of device devfreq and
reduces monitoring code complexity.
- decouple delayed work based load monitoring logic from core
by introducing helpers functions to be used by governors. This
provides flexibility for governors either to use delayed work
based monitoring functions or to implement their own mechanism.
- devfreq core interacts with governors via events to perform
specific actions. These events include start/stop devfreq.
This sets ground for adding suspend/resume events.The devfreq apis are not modified and are kept intact.
Signed-off-by: Rajagopal Venkat
Acked-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki
22 Aug, 2012
1 commit
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Initalizers for deferrable delayed_work are confused.
* __DEFERRED_WORK_INITIALIZER()
* DECLARE_DEFERRED_WORK()
* INIT_DELAYED_WORK_DEFERRABLE()Rename them to
* __DEFERRABLE_WORK_INITIALIZER()
* DECLARE_DEFERRABLE_WORK()
* INIT_DEFERRABLE_WORK()This patch doesn't cause any functional changes.
Signed-off-by: Tejun Heo
24 May, 2012
1 commit
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Pull power management updates from Rafael Wysocki:
- Implementation of opportunistic suspend (autosleep) and user space
interface for manipulating wakeup sources.- Hibernate updates from Bojan Smojver and Minho Ban.
- Updates of the runtime PM core and generic PM domains framework
related to PM QoS.- Assorted fixes.
* tag 'pm-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (25 commits)
epoll: Fix user space breakage related to EPOLLWAKEUP
PM / Domains: Make it possible to add devices to inactive domains
PM / Hibernate: Use get_gendisk to verify partition if resume_file is integer format
PM / Domains: Fix computation of maximum domain off time
PM / Domains: Fix link checking when add subdomain
PM / Sleep: User space wakeup sources garbage collector Kconfig option
PM / Sleep: Make the limit of user space wakeup sources configurable
PM / Documentation: suspend-and-cpuhotplug.txt: Fix typo
PM / Domains: Cache device stop and domain power off governor results, v3
PM / Domains: Make device removal more straightforward
PM / Sleep: Fix a mistake in a conditional in autosleep_store()
epoll: Add a flag, EPOLLWAKEUP, to prevent suspend while epoll events are ready
PM / QoS: Create device constraints objects on notifier registration
PM / Runtime: Remove device fields related to suspend time, v2
PM / Domains: Rework default domain power off governor function, v2
PM / Domains: Rework default device stop governor function, v2
PM / Sleep: Add user space interface for manipulating wakeup sources, v3
PM / Sleep: Add "prevent autosleep time" statistics to wakeup sources
PM / Sleep: Implement opportunistic sleep, v2
PM / Sleep: Add wakeup_source_activate and wakeup_source_deactivate tracepoints
...
02 May, 2012
1 commit
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Performance and powersave governor's get_target_freq
is not called if driver chooses one of these two governors.
Add init function in governor profile to call update_devfreq
which will call get_target_freq subsequently.Signed-off-by: Xiaoguang Chen
Acked-by: MyungJoo Ham
Signed-off-by: Rafael J. Wysocki
16 Apr, 2012
1 commit
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Correct spelling typo in various Kconfig file.
Signed-off-by: Masanari Iida
Signed-off-by: Jiri Kosina