Commit Graph

781672 Commits

Author SHA1 Message Date
Alexandre Belloni b56295dd33 rtc: ab8500: use rtc_add_group
Use rtc_add_group to add the sysfs group in a race free manner.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:36:44 +02:00
Alexandre Belloni 1654a2b06b rtc: rs5c348: report error when time is invalid
Instead of resetting the RTC to an bogus valid time, let userspace know
that the time is invalid when XSTP is set. Reset XSTP when setting the time
again.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:03 +02:00
Alexandre Belloni 2d7be4ed7a rtc: rs5c348: remove forward declaration
The name passed to devm_rtc_device_register is now unused. anyway, switch
to devm_rtc_allocate_device to avoid forward declaring rs5c348_driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:03 +02:00
Alexandre Belloni 02a6e12932 rtc: rs5c348: remove useless label
Since commit 8fb1ecb36f ("rtc: rtc-rs5c348: use devm_*() functions") the
kfree_exit label simply returns ret.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:03 +02:00
Alexandre Belloni f6e3d773e1 rtc: armada38x: switch to rtc_time64_to_tm/rtc_tm_to_time64
Call the 64bit versions of rtc_time_to_tm and rtc_tm_to_time now that the
range is enforced by the core.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:03 +02:00
Alexandre Belloni ef2a7176c8 rtc: armada38x: add range
The RTC is a 32bit seconds counter.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:02 +02:00
Alexandre Belloni 7d61cbb945 rtc: armada38x: fix possible race condition
The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.

Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
before requesting the IRQ.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:02 +02:00
Alexandre Belloni 0ae3f24ded rtc: lib: correct documentation typo
rtc_time64_to_tm has not been called rtc_time_to_tm64

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:02 +02:00
Alexandre Belloni 6a5f2a1f4d rtc: ds1307: use rtc_add_group
Register frequency test using rtc_add_group to avoid a possible race
condition and simplify the code.

This also moves the attribute to its proper location under the rtc device
instead of the i2c parent device.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:01 +02:00
Alexandre Belloni cfb74916e2 rtc: ds1685: use rtc_add_group
Use rtc_add_group to add the sysfs group in a race free manner.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:01 +02:00
Alexandre Belloni 482419e120 rtc: ds1685: use generic nvmem
Instead of adding a binary sysfs attribute from the driver, use the core to
register an nvmem device.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:01 +02:00
Alexandre Belloni 8ddeb09de1 rtc: ds1685: drop RTC_DS1685_PROC_REGS
/proc is not the correct ABI to display debugging info. Remove
RTC_DS1685_PROC_REGS as the driver hasn't seen any real development since
it was included.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:00 +02:00
Alexandre Belloni c7080e2016 rtc: test: Switch to SPDX identifier
Replace the license boilerplate by an SPDX identifier

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:00 +02:00
Alexandre Belloni fd13c930fe rtc: test: make license text and module license match.
The license text is specifying GPL v2 only but the MODULE_LICENSE is set to
GPL which means GNU Public License v2 or later. When MODULE_LICENSE and
boiler plate does not match, go for boiler plate license.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:21:00 +02:00
Alexandre Belloni 2ab78755e9 rtc: tx4939: fixup nvmem name and register size
The default word_size and stride of 1 are correct for the tx4939. Also fix
the nvmem folder name.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:20:59 +02:00
Alexandre Belloni 4b3a6a3ac5 rtc: isl1208: don't include core header file
The core header file is reserved for the core, stop including it.

Also reorder includes alphabetically.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:20:59 +02:00
Alexandre Belloni eb2bccb70b rtc: move rtc_add_group/s definitions
Move rtc_add_group and rtc_add_groups definition to rtc.h that is available
for all RTC drivers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:20:59 +02:00
Alexandre Belloni db7a67b9c3 rtc: reorder Makefile entries
A few entries are not placed correctly, reorder them.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:20:58 +02:00
Giulio Benetti b41c23e152 rtc: ds1307: add frequency_test_enable attribute on m41txx
On m41txx you can enable open-drain OUT pin to check if offset is ok.
Enabling OUT pin with frequency_test_enable attribute, OUT pin will tick
512 times faster than 1s tick base.

Enable or Disable FT bit on CONTROL register if freq_test is 1 or 0.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:20:58 +02:00
Giulio Benetti 79230ff641 rtc: ds1307: add offset sysfs for mt41txx chips.
m41txx chips can hold a calibration value to get correct clock bias.

Add offset handling (ranging between -63ppm and 126ppm) via sysfs.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-28 14:20:58 +02:00
Alexandre Belloni 1b4c794fda rtc: isl1208: avoid possible sysfs race
Use rtc_add_group to add the common sysfs group to avoid a possible race
condition.

[Denis.Osterland@diehl.com: use to_i2c_client(dev->parent)]
Signed-off-by: Denis Osterland <Denis.Osterland@diehl.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The move of atrim, dtrim usr sysfs properties from i2c device
to rtc device require to access them via dev->parent.
This patch also aligns timestamp0.
2018-09-28 14:14:38 +02:00
Alexandre Belloni f1c8bc332e rtc: remove irq_task from kerneldoc
Stale mentions of irq_task are left in the kerneldoc after its removal.
Remove them.

There is still one indirect mention left but commit 3c8bb90efb ("rtc: Fix
hrtimer deadlock") can probably be reverted now.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-13 15:43:07 +02:00
Alexandre Belloni 1e479c619b rtc: unexport non devm managed registration
Ensure the non managed version of the un/registration functions is not used
anymore. No driver is using it anymore and they should not be necessary.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-13 15:43:05 +02:00
Alexandre Belloni 4392ec1a6c Immutable branch between MFD and RTC due for the v4.20 merge window
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Merge tag 'ib-mfd-rtc-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into rtc-next

Immutable branch between MFD and RTC due for the v4.20 merge window

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-12 22:14:44 +02:00
Jeremy Gebben 749e36d0a0 rtc: abx80x: add basic watchdog support
The abx804 and abx805 chips have support for a simple watchdog
function that can trigger an external reset.

Signed-off-by: Jeremy Gebben <jgebben@sweptlaser.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-12 12:02:21 +02:00
Jeremy Gebben af69f9a787 rtc: abx80x: use a 'priv' struct for client data
This will allow additional data to be tracked, for future
improvements.

Signed-off-by: Jeremy Gebben <jgebben@sweptlaser.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-12 12:02:19 +02:00
Alexandre Belloni 9612f8f503 mfd: menelaus: Fix possible race condition and leak
The IRQ work is added before the struct rtc is allocated and registered,
but this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.

Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
before calling menelaus_add_irq_work.

Also, this solves a possible leak as the RTC is never released.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2018-09-11 16:40:21 +01:00
Alexandre Belloni b7aff107f3 rtc: pl031: switch to devm_rtc_allocate_device/rtc_register_device
Switch to devm_rtc_allocate_device to simplify the erro and driver removal
paths.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-11 13:56:35 +02:00
Alexandre Belloni c778ec8582 rtc: pl030: fix possible race condition
The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.

Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
before requesting the IRQ.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-11 13:56:35 +02:00
Alexandre Belloni babab2f864 rtc: mt6397: fix possible race condition
The IRQ is requested before the struct rtc is allocated and registered, but
this struct is used in the IRQ handler. This may lead to a NULL pointer
dereference.

Switch to devm_rtc_allocate_device/rtc_register_device to allocate the rtc
before requesting the IRQ.

Acked-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-11 13:56:20 +02:00
Arnd Bergmann 05a0a34418 rtc: mips: default to rtc-cmos on mips
The old rtc driver is getting in the way of some compat_ioctl
simplification. Looking up the loongson64 git history, it seems
that everyone uses the more modern but compatible RTC_CMOS driver
anyway, so let's remove the special case for loongson64.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-08 10:10:26 +02:00
YueHaibing de96bc3995 rtc: mrst: remove set but not used variable 'valid'
Fixes gcc '-Wunused-but-set-variable' warning:

drivers/rtc/rtc-mrst.c: In function 'mrst_procfs':
drivers/rtc/rtc-mrst.c:264:29: warning:
 variable 'valid' set but not used [-Wunused-but-set-variable]
  unsigned char rtc_control, valid;

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-31 11:17:41 +02:00
Alexandre Belloni ac771ed746 rtc: rv8803: add Epson RX8803 support
The Epson rx8803 is mostly similar to the Microcrystal RV8803 but the size
of the offset register is 4 bits vs 6 bits but it has a configurable
temperature compensation.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 23:24:36 +02:00
Alexandre Belloni c856618d20 rtc: rv8803: fix the rv8803 id in the OF table
The ID for RV8803 must be rv_8803

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 23:24:35 +02:00
Dan Carpenter 777d8ae56d rtc: sysfs: fix NULL check in rtc_add_groups()
devm_kcalloc() returns NULL, it never returns error pointers.  In the
current code we would return PTR_ERR(NULL) which is success, instead of
returning the -ENOMEM error code.

Fixes: a0a1a1ba30 ("rtc: sysfs: facilitate attribute add to rtc device")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 23:03:34 +02:00
Gustavo A. R. Silva 725e0e15f8 rtc: sun6i: Use struct_size() in kzalloc()
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:

struct foo {
	int stuff;
        void *entry[];
};

instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);

Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:

instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 23:02:18 +02:00
Paul Cercueil 1e6e4e169a rtc: jz4740: Drop dependency on MACH_INGENIC
Depending on MACH_INGENIC prevent us from creating a generic kernel that
works on more than one MIPS board. Instead, we just depend on MIPS being
set.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 22:59:37 +02:00
Keerthy 09058eab4b rtc: omap: Cut down the shutdown time from 2 seconds to 1 sec
Cut down the shutdown time from 2 seconds to 1 sec. In case of roll
over try again.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 22:51:57 +02:00
Keerthy 0438002ac5 rtc: omap: use of_device_is_system_power_controller function
Use of_device_is_system_power_controller instead of manually reading
the system-power-controller property from the device tree node.

Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 22:51:56 +02:00
Jia-Ju Bai c6b5eb8dd3 rtc: rtc-mrst: Replace mdelay() with msleep() in mrst_read_time()
mrst_read_time() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep().

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 22:51:54 +02:00
Linus Torvalds 5b394b2ddf Linux 4.19-rc1 2018-08-26 14:11:59 -07:00
Linus Torvalds b933d6ebf2 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer update from Thomas Gleixner:
 "New defines for the compat time* types so they can be shared between
  32bit and 64bit builds. Not used yet, but merging them now allows the
  actual conversions to be merged through different maintainer trees
  without dependencies

  We still have compat interfaces for 32bit on 64bit even with the new
  2038 safe timespec/val variants because pointer size is different. And
  for the old style timespec/val interfaces we need yet another 'compat'
  interface for both 32bit native and 32bit on 64bit"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  y2038: Provide aliases for compat helpers
2018-08-26 13:39:05 -07:00
Linus Torvalds aba16dc5cf Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax
Pull IDA updates from Matthew Wilcox:
 "A better IDA API:

      id = ida_alloc(ida, GFP_xxx);
      ida_free(ida, id);

  rather than the cumbersome ida_simple_get(), ida_simple_remove().

  The new IDA API is similar to ida_simple_get() but better named.  The
  internal restructuring of the IDA code removes the bitmap
  preallocation nonsense.

  I hope the net -200 lines of code is convincing"

* 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits)
  ida: Change ida_get_new_above to return the id
  ida: Remove old API
  test_ida: check_ida_destroy and check_ida_alloc
  test_ida: Convert check_ida_conv to new API
  test_ida: Move ida_check_max
  test_ida: Move ida_check_leaf
  idr-test: Convert ida_check_nomem to new API
  ida: Start new test_ida module
  target/iscsi: Allocate session IDs from an IDA
  iscsi target: fix session creation failure handling
  drm/vmwgfx: Convert to new IDA API
  dmaengine: Convert to new IDA API
  ppc: Convert vas ID allocation to new IDA API
  media: Convert entity ID allocation to new IDA API
  ppc: Convert mmu context allocation to new IDA API
  Convert net_namespace to new IDA API
  cb710: Convert to new IDA API
  rsxx: Convert to new IDA API
  osd: Convert to new IDA API
  sd: Convert to new IDA API
  ...
2018-08-26 11:48:42 -07:00
Linus Torvalds c4726e774e gcc plugin fix:
- Lift gcc test into Kconfig
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Merge tag 'gcc-plugins-v4.19-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull gcc plugin fix from Kees Cook:
 "Lift gcc test into Kconfig. This is for better behavior when the
  kernel is built with Clang, reported by Stefan Agner"

* tag 'gcc-plugins-v4.19-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  gcc-plugins: Disable when building under Clang
2018-08-26 11:41:08 -07:00
Linus Torvalds d207ea8e74 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Thomas Gleixner:
 "Kernel:
   - Improve kallsyms coverage
   - Add x86 entry trampolines to kcore
   - Fix ARM SPE handling
   - Correct PPC event post processing

  Tools:
   - Make the build system more robust
   - Small fixes and enhancements all over the place
   - Update kernel ABI header copies
   - Preparatory work for converting libtraceevnt to a shared library
   - License cleanups"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (100 commits)
  tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'
  tools arch x86: Update tools's copy of cpufeatures.h
  perf python: Fix pyrf_evlist__read_on_cpu() interface
  perf mmap: Store real cpu number in 'struct perf_mmap'
  perf tools: Remove ext from struct kmod_path
  perf tools: Add gzip_is_compressed function
  perf tools: Add lzma_is_compressed function
  perf tools: Add is_compressed callback to compressions array
  perf tools: Move the temp file processing into decompress_kmodule
  perf tools: Use compression id in decompress_kmodule()
  perf tools: Store compression id into struct dso
  perf tools: Add compression id into 'struct kmod_path'
  perf tools: Make is_supported_compression() static
  perf tools: Make decompress_to_file() function static
  perf tools: Get rid of dso__needs_decompress() call in __open_dso()
  perf tools: Get rid of dso__needs_decompress() call in symbol__disassemble()
  perf tools: Get rid of dso__needs_decompress() call in read_object_code()
  tools lib traceevent: Change to SPDX License format
  perf llvm: Allow passing options to llc in addition to clang
  perf parser: Improve error message for PMU address filters
  ...
2018-08-26 11:25:21 -07:00
Linus Torvalds 2a8a2b7c49 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:

 - Correct the L1TF fallout on 32bit and the off by one in the 'too much
   RAM for protection' calculation.

 - Add a helpful kernel message for the 'too much RAM' case

 - Unbreak the VDSO in case that the compiler desides to use indirect
   jumps/calls and emits retpolines which cannot be resolved because the
   kernel uses its own thunks, which does not work for the VDSO. Make it
   use the builtin thunks.

 - Re-export start_thread() which was unexported when the 32/64bit
   implementation was unified. start_thread() is required by modular
   binfmt handlers.

 - Trivial cleanups

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/speculation/l1tf: Suggest what to do on systems with too much RAM
  x86/speculation/l1tf: Fix off-by-one error when warning that system has too much RAM
  x86/kvm/vmx: Remove duplicate l1d flush definitions
  x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit
  x86/process: Re-export start_thread()
  x86/mce: Add notifier_block forward declaration
  x86/vdso: Fix vDSO build if a retpoline is emitted
2018-08-26 10:13:21 -07:00
Linus Torvalds de3750351c Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq update from Thomas Gleixner:
 "A small set of updats/fixes for the irq subsystem:

   - Allow GICv3 interrupts to be configured as wake-up sources to
     enable wakeup from suspend

   - Make the error handling of the STM32 irqchip init function work

   - A set of small cleanups and improvements"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/gic-v3: Allow interrupt to be configured as wake-up sources
  irqchip/tango: Set irq handler and data in one go
  dt-bindings: irqchip: renesas-irqc: Document r8a774a1 support
  irqchip/s3c24xx: Remove unneeded comparison of unsigned long to 0
  irqchip/stm32: Fix init error handling
  irqchip/bcm7038-l1: Hide cpu offline callback when building for !SMP
2018-08-26 09:55:28 -07:00
Linus Torvalds a9ce323378 Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull licking update from Thomas Gleixner:
 "Mark the switch cases which fall through to the next case with the
  proper comment so the fallthrough compiler checks can be enabled"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Mark expected switch fall-throughs
2018-08-26 09:47:00 -07:00
Linus Torvalds 2923b27e54 libnvdimm-for-4.19_dax-memory-failure
* memory_failure() gets confused by dev_pagemap backed mappings. The
   recovery code has specific enabling for several possible page states
   that needs new enabling to handle poison in dax mappings. Teach
   memory_failure() about ZONE_DEVICE pages.
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Merge tag 'libnvdimm-for-4.19_dax-memory-failure' of gitolite.kernel.org:pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm memory-failure update from Dave Jiang:
 "As it stands, memory_failure() gets thoroughly confused by dev_pagemap
  backed mappings. The recovery code has specific enabling for several
  possible page states and needs new enabling to handle poison in dax
  mappings.

  In order to support reliable reverse mapping of user space addresses:

   1/ Add new locking in the memory_failure() rmap path to prevent races
      that would typically be handled by the page lock.

   2/ Since dev_pagemap pages are hidden from the page allocator and the
      "compound page" accounting machinery, add a mechanism to determine
      the size of the mapping that encompasses a given poisoned pfn.

   3/ Given pmem errors can be repaired, change the speculatively
      accessed poison protection, mce_unmap_kpfn(), to be reversible and
      otherwise allow ongoing access from the kernel.

  A side effect of this enabling is that MADV_HWPOISON becomes usable
  for dax mappings, however the primary motivation is to allow the
  system to survive userspace consumption of hardware-poison via dax.
  Specifically the current behavior is:

     mce: Uncorrected hardware memory error in user-access at af34214200
     {1}[Hardware Error]: It has been corrected by h/w and requires no further action
     mce: [Hardware Error]: Machine check events logged
     {1}[Hardware Error]: event severity: corrected
     Memory failure: 0xaf34214: reserved kernel page still referenced by 1 users
     [..]
     Memory failure: 0xaf34214: recovery action for reserved kernel page: Failed
     mce: Memory error not recovered
     <reboot>

  ...and with these changes:

     Injecting memory failure for pfn 0x20cb00 at process virtual address 0x7f763dd00000
     Memory failure: 0x20cb00: Killing dax-pmd:5421 due to hardware memory corruption
     Memory failure: 0x20cb00: recovery action for dax page: Recovered

  Given all the cross dependencies I propose taking this through
  nvdimm.git with acks from Naoya, x86/core, x86/RAS, and of course dax
  folks"

* tag 'libnvdimm-for-4.19_dax-memory-failure' of gitolite.kernel.org:pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm, pmem: Restore page attributes when clearing errors
  x86/memory_failure: Introduce {set, clear}_mce_nospec()
  x86/mm/pat: Prepare {reserve, free}_memtype() for "decoy" addresses
  mm, memory_failure: Teach memory_failure() about dev_pagemap pages
  filesystem-dax: Introduce dax_lock_mapping_entry()
  mm, memory_failure: Collect mapping size in collect_procs()
  mm, madvise_inject_error: Let memory_failure() optionally take a page reference
  mm, dev_pagemap: Do not clear ->mapping on final put
  mm, madvise_inject_error: Disable MADV_SOFT_OFFLINE for ZONE_DEVICE pages
  filesystem-dax: Set page->index
  device-dax: Set page->index
  device-dax: Enable page_mapping()
  device-dax: Convert to vmf_insert_mixed and vm_fault_t
2018-08-25 18:43:59 -07:00
Linus Torvalds 828bf6e904 libnvdimm-for-4.19_misc
Collection of misc libnvdimm patches for 4.19 submission
 * Adding support to read locked nvdimm capacity.
 
 * Change test code to make DSM failure code injection an override.
 
 * Add support for calculate maximum contiguous area for namespace.
 
 * Add support for queueing a short ARS when there is on going ARS for
   nvdimm.
 
 * Allow NULL to be passed in to ->direct_access() for kaddr and
   pfn params.
 
 * Improve smart injection support for nvdimm emulation testing.
 
 * Fix test code that supports for emulating controller temperature.
 
 * Fix hang on error before devm_memremap_pages()
 
 * Fix a bug that causes user memory corruption when data returned
   to user for ars_status.
 
 * Maintainer updates for Ross Zwisler emails and adding Jan Kara to fsdax.
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Merge tag 'libnvdimm-for-4.19_misc' of gitolite.kernel.org:pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dave Jiang:
 "Collection of misc libnvdimm patches for 4.19 submission:

   - Adding support to read locked nvdimm capacity.

   - Change test code to make DSM failure code injection an override.

   - Add support for calculate maximum contiguous area for namespace.

   - Add support for queueing a short ARS when there is on going ARS for
     nvdimm.

   - Allow NULL to be passed in to ->direct_access() for kaddr and pfn
     params.

   - Improve smart injection support for nvdimm emulation testing.

   - Fix test code that supports for emulating controller temperature.

   - Fix hang on error before devm_memremap_pages()

   - Fix a bug that causes user memory corruption when data returned to
     user for ars_status.

   - Maintainer updates for Ross Zwisler emails and adding Jan Kara to
     fsdax"

* tag 'libnvdimm-for-4.19_misc' of gitolite.kernel.org:pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm: fix ars_status output length calculation
  device-dax: avoid hang on error before devm_memremap_pages()
  tools/testing/nvdimm: improve emulation of smart injection
  filesystem-dax: Do not request kaddr and pfn when not required
  md/dm-writecache: Don't request pointer dummy_addr when not required
  dax/super: Do not request a pointer kaddr when not required
  tools/testing/nvdimm: kaddr and pfn can be NULL to ->direct_access()
  s390, dcssblk: kaddr and pfn can be NULL to ->direct_access()
  libnvdimm, pmem: kaddr and pfn can be NULL to ->direct_access()
  acpi/nfit: queue issuing of ars when an uc error notification comes in
  libnvdimm: Export max available extent
  libnvdimm: Use max contiguous area for namespace size
  MAINTAINERS: Add Jan Kara for filesystem DAX
  MAINTAINERS: update Ross Zwisler's email address
  tools/testing/nvdimm: Fix support for emulating controller temperature
  tools/testing/nvdimm: Make DSM failure code injection an override
  acpi, nfit: Prefer _DSM over _LSR for namespace label reads
  libnvdimm: Introduce locked DIMM capacity support
2018-08-25 18:13:10 -07:00