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2011-07-08gpio-charger: Fix checking return value of request_any_context_irqAxel Lin
request_any_context_irq() returns a negative value on failure. On success, it returns either IRQC_IS_HARDIRQ or IRQC_IS_NESTED. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08power_supply: MAX17042: Support additional propertiesDonggeun Kim
This patch supports additional properties (PRESENT, CYCLE_COUNT, VOLTAGE_MAX, VOLTAGE_MIN_DESIGN, CURRENT_NOW, CURRENT_AVG, CHARGE_FULL, and TEMP). Plus, initialization code for registers is added. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: KyungMin Park <kyungmin.park@samsung.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08max8903_charger: Allow platform data to be __initdataMyungJoo Ham
Platform files may have declared 8903 platform data as __initdata. This patch removes the dependency on pdata pointer so that using __initdata on pdata will not incur errors. Note that such error does not incur SECTION MISMATCH warning in (at least some) compilers. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08power_supply: Add charger driver for MAX8998/LP3974Donggeun Kim
This patch supports power supply APIs for MAX8998/LP3974. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: KyungMin Park <kyungmin.park@samsung.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08power_supply: Add charger driver for MAX8997/8966Donggeun Kim
MAX8997/8966 chip is a multi-function device which includes PMIC, RTC, Fuel Gauge, MUIC, Haptic, Flash control, and Battery charging control. The driver for it is located at drivers/mfd. This patch supports battery charging control of MAX8997/8966 chip and provides power supply class information to userspace. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: KyungMin Park <kyungmin.park@samsung.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08max17042_battery: Remove obsolete cleanup for clientdataWolfram Sang
A few new i2c-drivers came into the kernel which clear the clientdata-pointer on exit or error. This is obsolete meanwhile, the core will do it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: MyungJoo Ham <myungjoo.ham@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08twl4030_charger: Fix warningsGrazvydas Ignotas
Fix warnings emitted by some versions of gcc: drivers/power/twl4030_charger.c:490: warning: overflow in implicit constant conversion drivers/power/twl4030_charger.c:498: warning: overflow in implicit constant conversion While at it, also fix module_param permissions and a typo in my name. Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08wm831x_power: Support multiple instancesMark Brown
If there are multiple wm831x devices in the system we need to assign different names to the power supply devices in order to ensure we can create the sysfs entries for them. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08wm831x_backup: Support multiple instancesMark Brown
If there are multiple wm831x devices in the system we need to assign different names to the power supply devices in order to ensure we can create the sysfs entries for them. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08apm_power: Fix style error in macrosKen O'Brien
Two macros in the changed file contained complex expressions which were not enclosed by parentheses. Signed-off-by: Ken O'Brien <kernel@kenobrien.org> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08s3c_adc_battery: Fix annotation for s3c_adc_battery_probe()Mark Brown
A probe() function is used at device init time rather than system init time. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08bq20z75: Enable detection after registeringRhyland Klein
Need to enable detection, which is also blocking the unit conversion logic after registering the power_supply. Signed-off-by: Rhyland Klein <rklein@nvidia.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-07-08bq20z75: Add support for external notificationRhyland Klein
Adding support for external power change notification. One problem found is that there is a lag time before the sensor will return a new status. To ensure that we only fire off the power_supply_changed event when the status returned from the sensor is actually different, we delay sending the the notification, and instead poll on it looking for a change. The amount of time to poll is configurable via platform data. Signed-off-by: Rhyland Klein <rklein@nvidia.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-05-20PXA: Use dev_pm_ops in z2_batteryMarek Vasut
Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-05-20ds2760_battery: Fix rated capacity of the hx4700 1800mAh batteryPaul Parsons
Fix rated capacity of the HP iPAQ hx4700 3.7V 1800mAh (359113-001) battery. For this battery the value of the rated capacity EEPROM register at 0x32 is 7; thus rated_capacities[7] = 1800. Signed-off-by: Paul Parsons <lost.distance@yahoo.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-05-20ds2760_battery: Fix indexing of the 4 active full EEPROM registersPaul Parsons
Fix indexing of the 4 active full EEPROM registers. The indexing was out by 1, accessing the EEPROM registers at 0x23 to 0x26 instead of 0x22 to 0x25. Signed-off-by: Paul Parsons <lost.distance@yahoo.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-05-20power: Make test_power driver more dynamic.John Stultz
In 2008 Masashi YOKOTA <yokota@pylone.jp> created the virtual battery driver found here: http://downloads.pylone.jp/src/virtual_battery/virtual_battery-0.0.1.tar.bz2 It found use out of tree, but was never merged upstream. Since then the test_power driver has been merged, which provides very similar functionality. This patch extends the test_power driver to be more dynamic at runtime, by merging portions of the Virtual Battery Driver by Masashi YOKOTA. With this patch, I can tweak the values in: /sys/module/test_power/parameters/* and watch the behavior of the gnome power managment daemon or other battery UI software. CC: Anton Vorontsov <cbouatmailru@gmail.com> CC: Akihiro MAEDA <sola.1980.a@gmail.com> CC: Masashi YOKOTA <yokota@pylone.jp> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-05-20bq27x00_battery: Name of cycle count propertyPali Rohár
This patch fix using correct property POWER_SUPPLY_PROP_CYCLE_COUNT for cycle count instead POWER_SUPPLY_PROP_CHARGE_COUNTER Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Tested-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-04-22max8903_charger: Add GENERIC_HARDIRQS as a dependency (fixes S390 build)Anton Vorontsov
S390 is special as it doesn't have IRQ lines, so these errors pop up: drivers/built-in.o: In function 'max8903_remove': drivers/power/max8903_charger.c:355: undefined reference to 'free_irq' drivers/power/max8903_charger.c:357: undefined reference to 'free_irq' drivers/power/max8903_charger.c:359: undefined reference to 'free_irq' This commit fixes the issue by making the driver depend on GENERIC_HARDIRQS feature. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-04-20ARM: RX-51: Enable isp1704 power on/offKalle Jokiniemi
The isp1704 usb tranceiver is used for charging and can be disabled when not in use. Provide the powering routine to the driver via platform data. Also changed the indent of ".name" variable in rx51_charger_device definition to use tabs same way as the new ".dev" variable indent. Put this in the same patch since the indent fix is only needed when there are multiple members in the struct definition. Loosely based on earlier patches from Heikki Krogerus in Nokia N900 maemo kernel. Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@nokia.com> Acked-By: Heikki Krogerus <heikki.krogerus@nokia.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-04-20isp1704_charger: Allow board specific powering routineKalle Jokiniemi
The ISP1704/1707 chip can be put to full power down state by asserting the CHIP_SEL line. This patch enables platform or board specific hooks to put the device into power down mode in case not needed. This patch is a preparation for enabling this powering routine in n900 (rx-51) devices. Thanks to Heikki Krogerus for helping out with the patch. Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@nokia.com> Acked-By: Heikki Krogerus <heikki.krogerus@nokia.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-04-20gpio-charger: Add gpio_charger_resumeBenson Leung
Gpio charger should notify if the gpio state had changed during suspend. This will send a CHANGED event each time the system resumes, ensuring a plug/unplug of the charger is not missed. Signed-off-by: Benson Leung <bleung@chromium.org> Acked-By: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-04-20power_supply: Add driver for MAX8903 chargerMyungJoo Ham
MAX8903 is an integrated battery charger and selector with two power inputs (USB and AC adapter). This driver enables the charger, handles interrupts, and provides power-supply-class information to userland. Tested on Exynos4 NURI / S5PC210 SLP7 boards. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2011-04-18Linux 2.6.39-rc4v2.6.39-rc4Linus Torvalds
2011-04-18Merge branch 'for-39-rc4' of git://codeaurora.org/quic/kernel/davidb/linux-msmLinus Torvalds
* 'for-39-rc4' of git://codeaurora.org/quic/kernel/davidb/linux-msm: msm: timer: fix missing return value msm: Remove extraneous ffa device check
2011-04-18Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: xen-kbdfront - fix mouse getting stuck after save/restore Input: estimate number of events per packet Input: evdev - indicate buffer overrun with SYN_DROPPED Input: document event types and codes and their intended use Input: add KEY_IMAGES specifically for AL Image Browser Input: twl4030_keypad - fix potential NULL dereference in twl4030_kp_probe() Input: h3600_ts - fix error handling at connect Input: twl4030_keypad - avoid potential NULL-pointer dereference
2011-04-18Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: add blk_run_queue_async block: blk_delay_queue() should use kblockd workqueue md: fix up raid1/raid10 unplugging. md: incorporate new plugging into raid5. md: provide generic support for handling unplug callbacks. md - remove old plugging code. md/dm - remove remains of plug_fn callback. md: use new plugging interface for RAID IO. block: drop queue lock before calling __blk_run_queue() for kblockd punt Revert "block: add callback function for unplug notification" block: Enhance new plugging support to support general callbacks
2011-04-18Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/powermac: Build fix with SMP and CPU hotplug powerpc/perf_event: Skip updating kernel counters if register value shrinks powerpc: Don't write protect kernel text with CONFIG_DYNAMIC_FTRACE enabled powerpc: Fix oops if scan_dispatch_log is called too early powerpc/pseries: Use a kmem cache for DTL buffers powerpc/kexec: Fix regression causing compile failure on UP powerpc/85xx: disable Suspend support if SMP enabled powerpc/e500mc: Remove CPU_FTR_MAYBE_CAN_NAP/CPU_FTR_MAYBE_CAN_DOZE powerpc/book3e: Fix CPU feature handling on 64-bit e5500 powerpc: Check device status before adding serial device powerpc/85xx: Don't add disabled PCIe devices
2011-04-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (24 commits) Btrfs: fix free space cache leak Btrfs: avoid taking the chunk_mutex in do_chunk_alloc Btrfs end_bio_extent_readpage should look for locked bits Btrfs: don't force chunk allocation in find_free_extent Btrfs: Check validity before setting an acl Btrfs: Fix incorrect inode nlink in btrfs_link() Btrfs: Check if btrfs_next_leaf() returns error in btrfs_real_readdir() Btrfs: Check if btrfs_next_leaf() returns error in btrfs_listxattr() Btrfs: make uncache_state unconditional btrfs: using cached extent_state in set/unlock combinations Btrfs: avoid taking the trans_mutex in btrfs_end_transaction Btrfs: fix subvolume mount by name problem when default mount subvolume is set fix user annotation in ioctl.c Btrfs: check for duplicate iov_base's when doing dio reads btrfs: properly handle overlapping areas in memmove_extent_buffer Btrfs: fix memory leaks in btrfs_new_inode() Btrfs: check for duplicate iov_base's when doing dio reads Btrfs: reuse the extent_map we found when calling btrfs_get_extent Btrfs: do not use async submit for small DIO io's Btrfs: don't split dio bios if we don't have to ...
2011-04-18proc: do proper range check on readdir offsetLinus Torvalds
Rather than pass in some random truncated offset to the pid-related functions, check that the offset is in range up-front. This is just cleanup, the previous commit fixed the real problem. Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-18next_pidmap: fix overflow conditionLinus Torvalds
next_pidmap() just quietly accepted whatever 'last' pid that was passed in, which is not all that safe when one of the users is /proc. Admittedly the proc code should do some sanity checking on the range (and that will be the next commit), but that doesn't mean that the helper functions should just do that pidmap pointer arithmetic without checking the range of its arguments. So clamp 'last' to PID_MAX_LIMIT. The fact that we then do "last+1" doesn't really matter, the for-loop does check against the end of the pidmap array properly (it's only the actual pointer arithmetic overflow case we need to worry about, and going one bit beyond isn't going to overflow). [ Use PID_MAX_LIMIT rather than pid_max as per Eric Biederman ] Reported-by: Tavis Ormandy <taviso@cmpxchg8b.com> Analyzed-by: Robert Święcki <robert@swiecki.net> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-18Input: xen-kbdfront - fix mouse getting stuck after save/restoreIgor Mammedov
Mouse gets "stuck" after restore of PV guest but buttons are in working condition. If driver has been configured for ABS coordinates at start it will get XENKBD_TYPE_POS events and then suddenly after restore it'll start getting XENKBD_TYPE_MOTION events, that will be dropped later and they won't get into user-space. Regression was introduced by hunk 5 and 6 of 5ea5254aa0ad269cfbd2875c973ef25ab5b5e9db ("Input: xen-kbdfront - advertise either absolute or relative coordinates"). Driver on restore should ask xen for request-abs-pointer again if it is available. So restore parts that did it before 5ea5254. Acked-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Igor Mammedov <imammedo@redhat.com> [v1: Expanded the commit description] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2011-04-18Input: estimate number of events per packetJeff Brown
Calculate a default based on the number of ABS axes, REL axes, and MT slots for the device during input device registration. Signed-off-by: Jeff Brown <jeffbrown@android.com> Reviewed-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2011-04-18Btrfs: fix free space cache leakChris Mason
The free space caching code was recently reworked to cache all the pages it needed instead of using find_get_page everywhere. One loop was missed though, so it ended up leaking pages. This fixes it to use our page array instead of find_get_page. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-04-18block: add blk_run_queue_asyncChristoph Hellwig
Instead of overloading __blk_run_queue to force an offload to kblockd add a new blk_run_queue_async helper to do it explicitly. I've kept the blk_queue_stopped check for now, but I suspect it's not needed as the check we do when the workqueue items runs should be enough. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-18block: blk_delay_queue() should use kblockd workqueueJens Axboe
Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-18md: fix up raid1/raid10 unplugging.NeilBrown
We just need to make sure that an unplug event wakes up the md thread, which is exactly what mddev_check_plugged does. Also remove some plug-related code that is no longer needed. Signed-off-by: NeilBrown <neilb@suse.de>
2011-04-18md: incorporate new plugging into raid5.NeilBrown
In raid5 plugging is used for 2 things: 1/ collecting writes that require a bitmap update 2/ collecting writes in the hope that we can create full stripes - or at least more-full. We now release these different sets of stripes when plug_cnt is zero. Also in make_request, we call mddev_check_plug to hopefully increase plug_cnt, and wake up the thread at the end if plugging wasn't achieved for some reason. Signed-off-by: NeilBrown <neilb@suse.de>
2011-04-18md: provide generic support for handling unplug callbacks.NeilBrown
When an md device adds a request to a queue, it can call mddev_check_plugged. If this succeeds then we know that the md thread will be woken up shortly, and ->plug_cnt will be non-zero until then, so some processing can be delayed. If it fails, then no unplug callback is expected and the make_request function needs to do whatever is required to make the request happen. Signed-off-by: NeilBrown <neilb@suse.de>
2011-04-18md - remove old plugging code.NeilBrown
md has some plugging infrastructure for RAID5 to use because the normal plugging infrastructure required a 'request_queue', and when called from dm, RAID5 doesn't have one of those available. This relied on the ->unplug_fn callback which doesn't exist any more. So remove all of that code, both in md and raid5. Subsequent patches with restore the plugging functionality. Signed-off-by: NeilBrown <neilb@suse.de>
2011-04-18md/dm - remove remains of plug_fn callback.NeilBrown
Now that unplugging is done differently, the unplug_fn callback is never called, so it can be completely discarded. Signed-off-by: NeilBrown <neilb@suse.de>
2011-04-18md: use new plugging interface for RAID IO.NeilBrown
md/raid submits a lot of IO from the various raid threads. So adding start/finish plug calls to those so that some plugging happens. Signed-off-by: NeilBrown <neilb@suse.de>
2011-04-18block: drop queue lock before calling __blk_run_queue() for kblockd puntJens Axboe
If we know we are going to punt to kblockd, we can drop the queue lock before calling into __blk_run_queue() since it only does a safe bit test and a workqueue call. Since kblockd needs to grab this very lock as one of the first things it does, it's a good optimization to drop the lock before waking kblockd. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-18Revert "block: add callback function for unplug notification"Jens Axboe
MD can't use this since it really requires us to be able to keep more than a single piece of state for the unplug. Commit 048c9374 added the required support for MD, so get rid of this now unused code. This reverts commit f75664570d8b75469cc468f23c2b27220984983b. Conflicts: block/blk-core.c Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-18block: Enhance new plugging support to support general callbacksNeilBrown
md/raid requires an unplug callback, but as it does not uses requests the current code cannot provide one. So allow arbitrary callbacks to be attached to the blk_plug. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-18powerpc/powermac: Build fix with SMP and CPU hotplugBenjamin Herrenschmidt
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-04-18powerpc/perf_event: Skip updating kernel counters if register value shrinksEric B Munson
Because of speculative event roll back, it is possible for some event coutners to decrease between reads on POWER7. This causes a problem with the way that counters are updated. Delta calues are calculated in a 64 bit value and the top 32 bits are masked. If the register value has decreased, this leaves us with a very large positive value added to the kernel counters. This patch protects against this by skipping the update if the delta would be negative. This can lead to a lack of precision in the coutner values, but from my testing the value is typcially fewer than 10 samples at a time. Signed-off-by: Eric B Munson <emunson@mgebm.net> Cc: stable@kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-04-18powerpc: Don't write protect kernel text with CONFIG_DYNAMIC_FTRACE enabledStefan Roese
This problem was noticed on an MPC855T platform. Ftrace did oops when trying to write to the kernel text segment. Many thanks to Joakim for finding the root cause of this problem. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Joakim Tjernlund <joakim.tjernlund@transmode.se> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-04-18powerpc: Fix oops if scan_dispatch_log is called too earlyAnton Blanchard
We currently enable interrupts before the dispatch log for the boot cpu is setup. If a timer interrupt comes in early enough we oops in scan_dispatch_log: Unable to handle kernel paging request for data at address 0x00000010 ... .scan_dispatch_log+0xb0/0x170 .account_system_vtime+0xa0/0x220 .irq_enter+0x88/0xc0 .do_IRQ+0x48/0x230 The patch below adds a check to scan_dispatch_log to ensure the dispatch log has been allocated. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-04-18powerpc/pseries: Use a kmem cache for DTL buffersNishanth Aravamudan
PAPR specifies that DTL buffers can not cross AMS environments (aka CMO in the PAPR) and can not cross a memory entitlement granule boundary (4k). This is found in section 14.11.3.2 H_REGISTER_VPA of the PAPR. kmalloc does not guarantee an alignment of the allocation, though, beyond 8 bytes (at least in my understanding). Create a special kmem cache for DTL buffers with the alignment requirement. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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