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2016-11-30Merge branches 'thermal-core', 'thermal-intel', 'thermal-soc-fixes' and ↵Zhang Rui18-1521/+1644
'thermal-reorg' into next
2016-11-30thermal/x86 pkg temp: Convert to hotplug state machineSebastian Andrzej Siewior1-57/+23
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Replace the wrmsr/rdmrs_on_cpu() calls in the hotplug callbacks as they are guaranteed to be invoked on the incoming/outgoing cpu. Signed-off-by: Sebastian Andrzej Siewior <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Sanitize package managementThomas Gleixner1-20/+22
Packages are kept in a list, which must be searched over and over. We can be smarter than that and just store the package pointers in an array which is allocated at init time. Sizing of the array is determined from the topology information. That makes the package search a simple array lookup. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Move work into package structThomas Gleixner1-21/+52
Delayed work structs are held in a static percpu storage, which makes no sense at all because work is strictly per package and we never schedule more than one work per package. Aside of that the work cancelation in the hotplug is broken when the work is queued on the outgoing cpu and canceled. Nothing reschedules the work on another online cpu in the package, so the interrupts stay disabled and the work_scheduled flag stays active. Move the delayed work struct into the package struct, which is the only sensible place to have it. To simplify the cancelation logic schedule the work always on the cpu which is the target for the sysfs files. This is required so the cancelation logic in the cpu offline path cancels only when the outgoing cpu is the current target and reschedule the work when there is still a online CPU in the package. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Move work scheduled flag into package structThomas Gleixner1-30/+5
Storage for a boolean information whether work is scheduled for a package is kept in separate allocated storage, which is resized when the number of detected packages grows. With the proper locking in place this is a completely pointless exercise because we can simply stick it into the per package struct. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Sanitize lockingThomas Gleixner1-112/+110
The work cancellation code, the thermal zone unregistering, the work code and the interrupt notification function are racy against each other and against cpu hotplug and module exit. The random locking sprinkeled all over the place does not help anything and probably exists to make people feel good. The resulting issues (mainly use after free) are probably hard to trigger, but they clearly exist Protect the package list with a spinlock so it can be accessed from the interrupt notifier and also from the work function. The add/removal code in the hotplug callbacks take the lock for list manipulation. That makes sure that on removal neither the interrupt notifier nor the work function can access the about to be freed package structure anymore. The thermal zone unregistering is another trainwreck. It's not serialized against the work function. So unregistering the zone device can race with the work function and cause havoc. Protect the thermal zone with a mutex, which is held in the work function to make sure that the zone device is not being unregistered concurrently. To solve the module exit issues, we simply invoke the cpu offline callback and let it work its magic. For that it's required to keep track of the participating cpus in a package, because topology_core_mask is not affected by calling the offline callback for teardown of the driver, so it would never free the package as there is always a valid target in topology_core_mask. Use proper names for the locks so it's clear what they are for and add a pile of comments to explain the protection rules. It's amazing that fixing the locking and adding 30 lines of comments explaining it still removes more lines than it adds. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Cleanup code some moreThomas Gleixner1-51/+30
Coding style fixups and replacement of overly complex constructs and random error codes instead of returning the real ones. This mess makes the eyes bleeding. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Cleanup namespaceThomas Gleixner1-90/+76
Any randomly chosen struct name is more descriptive than phy_dev_entry. Rename the whole thing to struct pkg_device, which describes the content reasonably well and use the same variable name throughout the code so it gets readable. Rename the msr struct members as well. No functional change. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Get rid of ref countingThomas Gleixner1-42/+20
There is no point in the whole package data refcounting dance because topology_core_cpumask tells us whether this is the last cpu in the package. If yes, then the package can go, if not it stays. It's already serialized via the hotplug code. While at it rename the first_cpu member of the package structure to cpu. The first has absolutely no meaning. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Sanitize callback (de)initializationThomas Gleixner1-11/+8
The threshold callbacks are installed before the initialization of the online cpus has succeeded and removed after the teardown has been done. That's both wrong as callbacks might be invoked into a half initialized or torn down state. Move them to the proper places: Last in init() and first in exit(). While at it shorten the insane long and horrible named function names. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Replace open coded cpu searchThomas Gleixner1-15/+4
find_next_sibling() iterates over the online cpus and searches for a cpu with the same package id as the current cpu. This is a pointless exercise as topology_core_cpumask() allows a simple cpumask search for an online cpu on the same package. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Remove redundant package searchThomas Gleixner1-19/+14
In pkg_temp_thermal_device_remove() the package device is searched at the beginning of the function. When the device refcount becomes zero another search for the same device is conducted. Remove the pointless loop and use the device pointer which was retrieved at the beginning of the function. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal/x86_pkg_temp: Cleanup thermal interrupt handlingThomas Gleixner1-1/+10
Wenn a package is removed nothing restores the thermal interrupt MSR so the content will be stale when a CPU of that package becomes online again. Aside of that the work function reenables interrupts before acknowledging the current one, which is the wrong order to begin with. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Srinivas Pandruvada <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-30thermal: hwmon: Properly report critical temperature in sysfsKrzysztof Kozlowski1-1/+1
In the critical sysfs entry the thermal hwmon was returning wrong temperature to the user-space. It was reporting the temperature of the first trip point instead of the temperature of critical trip point. For example: /sys/class/hwmon/hwmon0/temp1_crit:50000 /sys/class/thermal/thermal_zone0/trip_point_0_temp:50000 /sys/class/thermal/thermal_zone0/trip_point_0_type:active /sys/class/thermal/thermal_zone0/trip_point_3_temp:120000 /sys/class/thermal/thermal_zone0/trip_point_3_type:critical Since commit e68b16abd91d ("thermal: add hwmon sysfs I/F") the driver have been registering a sysfs entry if get_crit_temp() callback was provided. However when accessed, it was calling get_trip_temp() instead of the get_crit_temp(). Fixes: e68b16abd91d ("thermal: add hwmon sysfs I/F") Cc: <[email protected]> Signed-off-by: Krzysztof Kozlowski <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23devfreq_cooling: pass a pointer to devfreq in the power model callbacksJavi Merino2-4/+7
When the devfreq cooling device was designed, it was an oversight not to pass a pointer to the struct devfreq as the first parameters of the callbacks. The design patterns of the kernel suggest it for a good reason. By passing a pointer to struct devfreq, the driver can register one function that works with multiple devices. With the current implementation, a driver that can work with multiple devices has to create multiple copies of the same function with different parameters so that each devfreq_cooling_device can use the appropriate one. By passing a pointer to struct devfreq, the driver can identify which device it's referring to. Cc: Zhang Rui <[email protected]> Cc: Eduardo Valentin <[email protected]> Reviewed-by: Punit Agrawal <[email protected]> Reviewed-by: Ørjan Eide <[email protected]> Reviewed-by: Lukasz Luba <[email protected]> Signed-off-by: Javi Merino <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23devfreq_cooling: make the structs devfreq_cooling_xxx visible for allLukasz Luba1-1/+2
Currently the protection #ifdef CONFIG_DEVFREQ_THERMAL cuts the needed structures devfreq_cooling_ops and devfreq_cooling_device. The functions which are supposed to provide the empty implementation complain about unknown structures. Similar solution is present in include/linux/devfreq.h. Reviewed-by: Ørjan Eide <[email protected]> Signed-off-by: Lukasz Luba <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23dt-bindings: rockchip-thermal: fix the misleading descriptionShawn Lin1-0/+3
"rockchip,hw-tshut-temp", "rockchip,hw-tshut-mode" and "rockchip,hw-tshut-polarity" are not a required properties actually as the code could also work by loading the default settings there. So it is apprently misleading, although we prefer to get these from DT. And it seems we miss the 'rockchip,grf' here which should also be an optional property. Acked-by: Rob Herring <[email protected]> Reviewed-by: Heiko Stuebner <[email protected]> Signed-off-by: Shawn Lin <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: rockchip: improve the warning logShawn Lin1-5/+2
It is no necessary to print warning agian and again if we don't add rockchip,grf for dt, otherwise I saw the following log when doing suspend-2-resume. We only need to print it once when parsing dt. It looks quite trivial but the log is apparently verbose. [ 26.615415] PM: early resume of devices complete after 1.539 msecs [ 26.622002] rk_tsadcv2_initialize: Missing rockchip,grf property [ 26.629359] rk_gmac-dwmac ff290000.ethernet: init for RGMII [ 26.639794] PM: resume of devices complete after 18.109 msecs [ 26.646925] Restarting tasks ... done. Reviewed-by: Caesar Wang <[email protected]> Reviewed-by: Heiko Stuebner <[email protected]> Signed-off-by: Shawn Lin <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: db8500: Fix module autoloadJavier Martinez Canillas1-0/+1
If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/thermal/db8500_thermal.ko | grep alias $ After this patch: $ modinfo drivers/thermal/db8500_thermal.ko | grep alias alias: of:N*T*Cstericsson,db8500-thermalC* alias: of:N*T*Cstericsson,db8500-thermal Signed-off-by: Javier Martinez Canillas <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: tango: Fix module autoloadJavier Martinez Canillas1-0/+1
If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/thermal/tango_thermal.ko | grep alias $ After this patch: $ modinfo drivers/thermal/tango_thermal.ko | grep alias alias: of:N*T*Csigma,smp8758-thermalC* alias: of:N*T*Csigma,smp8758-thermal Acked-by: Marc Gonzalez <[email protected]> Signed-off-by: Javier Martinez Canillas <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: max77620: Fix module autoloadJavier Martinez Canillas1-0/+1
If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/thermal/max77620_thermal.ko | grep alias $ After this patch: $ modinfo drivers/thermal/max77620_thermal.ko | grep alias alias: platform:max77620-thermal Signed-off-by: Javier Martinez Canillas <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: qcom-spmi: Treat reg property as a single cellStephen Boyd1-3/+3
We only read the first element of the reg property to figure out the offset of the temperature sensor inside the PMIC. Furthermore, we want to remove the second element in DT, so just don't read the second element so that probe keeps working if we change the DT in the future. Cc: Ivan T. Ivanov <[email protected]> Signed-off-by: Stephen Boyd <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: hisilicon: fix for dependencyLeo Yan1-1/+3
The thermal driver is standalone driver which is used to enable thermal sensors, so it can be used with any cooling device and should not bind with CPU cooling device driver. This original patch is suggested by Amit Kucheria; so it's to polish the dependency in Kconfig, and remove the dependency with CPU_THERMAL. Signed-off-by: Leo Yan <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: ti-soc-thermal: add missing clk_put()Luis Henriques1-2/+3
This patch fixes the following Coccinelle error: ./drivers/thermal/ti-soc-thermal/ti-bandgap.c:1441:1-7: \ ERROR: missing clk_put; clk_get on line 1290 \ and execution via conditional on line 1298 Signed-off-by: Luis Henriques <[email protected]> Signed-off-by: Eduardo Valentin <[email protected]>
2016-11-23thermal: core: move slop and offset helpers to thermal_helpers.cEduardo Valentin2-30/+30
Reorganize code to reflect better placement. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: sysfs: use kcalloc() instead of kzalloc()Eduardo Valentin1-5/+8
Simplify size computation by using kcalloc() for allocating memory for arrays. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: use kzalloc(sizeof(*ptr),...)Eduardo Valentin1-4/+3
As a safety check, this patch changes thermal core to check for pointer content size, instead of type size, while allocating memory. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: improve kerneldoc entry of thermal_cooling_device_unregisterEduardo Valentin1-3/+3
Improve description and keep 80 columns limit. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: remove style warnings and checksEduardo Valentin1-11/+11
Removing several style issues in thermal code code. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: remove void function return statementsEduardo Valentin1-2/+0
Simply removing useless returns of void functions. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: standardize line breaking alignmentEduardo Valentin1-13/+19
Pass through the code to remove check suggested by checkpatch.pl (alignment to parenthesis): CHECK: Alignment should match open parenthesis Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: small style fix when checking for __find_governor()Eduardo Valentin1-2/+2
Remove style issue: CHECK: Comparison to NULL could be written "!__find_governor" + if (__find_governor(governor->name) == NULL) { Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: remove FSF address in the GPL noticeEduardo Valentin1-13/+0
Simplify the GPL notice by removing the FSF address. No need to track FSF location in this file. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: sysfs: remove symbols of emul_temp when config is disabledEduardo Valentin1-1/+3
Remove the following warning: In file included from drivers/thermal/thermal_sysfs.c:19:0: include/linux/device.h:575:26: warning: ‘dev_attr_emul_temp’ defined but not used [-Wunused-variable] struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) ^ drivers/thermal/thermal_sysfs.c:395:8: note: in expansion of macro ‘DEVICE_ATTR’ when emul temp is disabled at Kconfig. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: add a comment describing the device management sectionEduardo Valentin1-2/+9
comment describing the section with function to handle registration, unregistration, binding, and unbinding of thermal devices. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: add a comment describing the power actor sectionEduardo Valentin1-0/+7
Simply marking the power actor section and adding a comment describing it. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: add a comment describing the main update loopEduardo Valentin1-0/+11
Simply marking the main update loop section and adding a comment describing it. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: move notify to the zone update sectionEduardo Valentin1-18/+18
moving the helper function to closer to similar functions. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: add inline to print_bind_err_msg()Eduardo Valentin1-2/+3
Given that this is simple wrapper, adding the inline flag. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: move __bind() to where it is usedEduardo Valentin1-33/+33
Moving the helper to closer where it is used. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: fix couple of style issues on __bind() helperEduardo Valentin1-5/+5
Removing style issues on __bind() and its helpers. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: move bind_tz() to where it is usedEduardo Valentin1-40/+40
Moving the helper to closer where it is used. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: move bind_cdev() to where it is usedEduardo Valentin1-38/+38
Moving the helper to closer where it is used. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: move __unbind() helper to where it is usedEduardo Valentin1-10/+10
Simply moving the helper to closer where it is actually used. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: small style fix on __unbind() helperEduardo Valentin1-1/+1
Simply aligning to parenthesis. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: move idr handling to device management sectionEduardo Valentin1-24/+24
Given that idr is only used to get id for thermal devices (zones and cooling), makes sense to move the code closer. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: group functions related to governor handlingEduardo Valentin1-73/+80
Organize thermal core code to group the functions handling with governor manipulation in one single section. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: introduce thermal_helpers.cEduardo Valentin3-171/+198
Here we have a simple code organization. This patch moves functions that do not need to handle thermal core internal data structure to thermal_helpers.c file. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: remove a couple of style issues on helpersEduardo Valentin1-4/+5
Reorganizing the code of helper functions to improve readability and style, as recommended by checkpatch.pl. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
2016-11-23thermal: core: move cooling device sysfs to thermal_sysfs.cEduardo Valentin3-127/+145
This is a code reorganization, simply to concentrate the sysfs handling functions in thermal_sysfs.c. This patch moves the cooling device handling functions. Cc: Zhang Rui <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Eduardo Valentin <[email protected]> Signed-off-by: Zhang Rui <[email protected]>
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