Device DAX is the device-centric analogue of Filesystem DAX
(CONFIG_FS_DAX). It allows memory ranges to be allocated and mapped
without need of an intervening file system. Device DAX is strict,
precise and predictable. Specifically this interface:
1/ Guarantees fault granularity with respect to a given page size (pte,
pmd, or pud) set at configuration time.
2/ Enforces deterministic behavior by being strict about what fault
scenarios are supported.
For example, by forcing MADV_DONTFORK semantics and omitting MAP_PRIVATE
support device-dax guarantees that a mapping always behaves/performs the
same once established. It is the "what you see is what you get" access
mechanism to differentiated memory vs filesystem DAX which has
filesystem specific implementation semantics.
Persistent memory is the first target, but the mechanism is also
targeted for exclusive allocations of performance differentiated memory
ranges.
This commit is limited to the base device driver infrastructure to
associate a dax device with pmem range.
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The dax_pmem driver was implementing an empty ->remove() method to
satisfy the nvdimm bus driver that unconditionally calls ->remove().
Teach the core bus driver to check if ->remove() is NULL to remove that
requirement.
Reported-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
We want to use the alignment as the allocation and mapping unit.
Previously this information was only useful for establishing the data
offset, but now it is important to remember the granularity for the
later use.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
We may want to subdivide a device-dax range into multiple devices so
that each can have separate permissions or naming. Reserve 128K of
label space by default so we have the capability of making allocation
decisions persistent. This reservation is not something we can add
later since it would result in the default size of a device-dax range
changing between kernel versions.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Device DAX is the device-centric analogue of Filesystem DAX
(CONFIG_FS_DAX). It allows persistent memory ranges to be allocated and
mapped without need of an intervening file system. This initial
infrastructure arranges for a libnvdimm pfn-device to be represented as
a different device-type so that it can be attached to a driver other
than the pmem driver.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The 'host' variable can be killed as it is always the same as the passed
in device.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The devm conversion obviates the need to continue to remember the queue
and disk locally in the driver.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Now that pmem internals have been disentangled from pfn setup, that code
can move to the core. This is in preparation for adding another user of
the pfn-device capabilities.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
In preparation for providing an alternative (to block device) access
mechanism to persistent memory, convert pmem_rw_bytes() to
nsio_rw_bytes(). This allows ->rw_bytes() functionality without
requiring a 'struct pmem_device' to be instantiated.
In other words, when ->rw_bytes() is in use i/o is driven through
'struct nd_namespace_io', otherwise it is driven through 'struct
pmem_device' and the block layer. This consolidates the disjoint calls
to devm_exit_badblocks() and devm_memunmap() into a common
devm_nsio_disable() and cleans up the init path to use a unified
pmem_attach_disk() implementation.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The leading '0x' in front of %pa is redundant, also we can just use %pR
to simplify the print statement. The request parameters can be directly
taken from the resource as well.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Register a callback to clean up the request_queue and put the gendisk at
driver disable time.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Consolidate the information for issuing i/o to a blk-namespace, and
eliminate some pointer chasing.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
I/O errors events have the potential to be a high frequency and a log
message for each event can swamp the system. This message is also
redundant with upper layer error reporting.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Save a pointer chase by storing the driver private data in the
request_queue rather than the gendisk.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Save a pointer chase by storing the driver private data in the
request_queue rather than the gendisk.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Register a callback to clean up the request_queue and put the gendisk at
driver disable time.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Pass the device performing the probe so we can use a devm allocation for
the btt superblock.
Cc: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Pass the device performing the probe so we can use a devm allocation for
the pfn superblock.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
We can derive the common namespace from other information. We also do
not need to cache it because all the usages are in slow paths.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Commit 9567366fef ("dm cache metadata: fix READ_LOCK macros and
cleanup WRITE_LOCK macros") uses down_write() instead of down_read() in
cmd_read_lock(), yet up_read() is used to release the lock in
READ_UNLOCK(). Fix it.
Fixes: 9567366fef ("dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros")
Cc: stable@vger.kernel.org
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Here are some small char/misc driver fixes for 4.6-rc4. Full details
are in the shortlog, nothing major here.
These have all been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iEYEABECAAYFAlcS4DQACgkQMUfUDdst+ylBIwCgtag4UtH2i+NwFiErDmmnokSz
h5oAn1488h1FTiXolyA9MnmRkWlf0ZPI
=aYD7
-----END PGP SIGNATURE-----
Merge tag 'char-misc-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc fixes from Greg KH:
"Here are some small char/misc driver fixes for 4.6-rc4. Full details
are in the shortlog, nothing major here.
These have all been in linux-next for a while with no reported issues"
* tag 'char-misc-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
lkdtm: do not leak free page on kmalloc failure
lkdtm: fix memory leak of base
lkdtm: fix memory leak of val
extcon: palmas: Drop stray IRQF_EARLY_RESUME flag
Here are 3 small fixes 4.6-rc4. Two fix up some lz4 issues with big
endian systems, and the remaining one resolves a minor debugfs issue
that was reported.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iEYEABECAAYFAlcS3ucACgkQMUfUDdst+ynw1QCbBGgbY7Xt08whNFcAP81z1Q5X
fmsAn1fyrhfsxe+JnybzswsTOjFw99Xd
=YX6h
-----END PGP SIGNATURE-----
Merge tag 'driver-core-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull misc fixes from Greg KH:
"Here are three small fixes for 4.6-rc4.
Two fix up some lz4 issues with big endian systems, and the remaining
one resolves a minor debugfs issue that was reported.
All have been in linux-next with no reported issues"
* tag 'driver-core-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
lib: lz4: cleanup unaligned access efficiency detection
lib: lz4: fixed zram with lz4 on big endian machines
debugfs: Make automount point inodes permanently empty
Here are some small USB fixes for 4.6-rc4.
Mostly xhci fixes for reported issues, a UAS bug that has hit a number
of people, including stable tree users, and a few other minor things.
All have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iEYEABECAAYFAlcS3ngACgkQMUfUDdst+ykPlgCeJ2UJu7dYz3ICVnxQ4zLkNG6A
yI0AoKa37VYqNkqRadj97g9E5S6KcsXi
=KmX3
-----END PGP SIGNATURE-----
Merge tag 'usb-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB driver fixes from Greg KH:
"Here are some small USB fixes for 4.6-rc4.
Mostly xhci fixes for reported issues, a UAS bug that has hit a number
of people, including stable tree users, and a few other minor things.
All have been in linux-next for a while with no reported issues"
* tag 'usb-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: hcd: out of bounds access in for_each_companion
USB: uas: Add a new NO_REPORT_LUNS quirk
USB: uas: Limit qdepth at the scsi-host level
doc: usb: Fix typo in gadget_multi documentation
usb: host: xhci-plat: Make enum xhci_plat_type start at a non zero value
xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers
usb: xhci: fix wild pointers in xhci_mem_cleanup
usb: host: xhci-plat: fix cannot work if R-Car Gen2/3 run on above 4GB phys
usb: host: xhci: add a new quirk XHCI_NO_64BIT_SUPPORT
xhci: resume USB 3 roothub first
usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host
cdc-acm: fix crash if flushed with nothing buffered
Okay we some driver fixes piled up, so time to get them up.
This time we have some odd fixes in hsu, edma, omap and xilinx.
Usual fixes and nothing special
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=bSYQ
-----END PGP SIGNATURE-----
Merge tag 'dmaengine-fix-4.6-rc4' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
"This time we have some odd fixes in hsu, edma, omap and xilinx.
Usual fixes and nothing special"
* tag 'dmaengine-fix-4.6-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: dw: fix master selection
dmaengine: edma: special case slot limit workaround
dmaengine: edma: Remove dynamic TPTC power management feature
dmaengine: vdma: don't crash when bad channel is requested
dmaengine: omap-dma: Do not suppress interrupts for memcpy
dmaengine: omap-dma: Fix polled channel completion detection and handling
dmaengine: hsu: correct use of channel status register
dmaengine: hsu: correct residue calculation of active descriptor
dmaengine: hsu: set HSU_CH_MTSR to memory width
Pull locking fixlet from Ingo Molnar:
"Fixes a build warning on certain Kconfig combinations"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/lockdep: Fix print_collision() unused warning
Pull block fixes from Jens Axboe:
"A few fixes for the current series. This contains:
- Two fixes for NVMe:
One fixes a reset race that can be triggered by repeated
insert/removal of the module.
The other fixes an issue on some platforms, where we get probe
timeouts since legacy interrupts isn't working. This used not to
be a problem since we had the worker thread poll for completions,
but since that was killed off, it means those poor souls can't
successfully probe their NVMe device. Use a proper IRQ check and
probe (msi-x -> msi ->legacy), like most other drivers to work
around this. Both from Keith.
- A loop corruption issue with offset in iters, from Ming Lei.
- A fix for not having the partition stat per cpu ref count
initialized before sending out the KOBJ_ADD, which could cause user
space to access the counter prior to initialization. Also from
Ming Lei.
- A fix for using the wrong congestion state, from Kaixu Xia"
* 'for-linus' of git://git.kernel.dk/linux-block:
block: loop: fix filesystem corruption in case of aio/dio
NVMe: Always use MSI/MSI-x interrupts
NVMe: Fix reset/remove race
writeback: fix the wrong congested state variable definition
block: partition: initialize percpuref before sending out KOBJ_ADD
Pull libnvdimm fixes from Ross Zwisler:
"Two fixes:
- Fix memcpy_from_pmem() to fallback to memcpy() for architectures
where CONFIG_ARCH_HAS_PMEM_API=n.
- Add a comment explaining why we write data twice when clearing
poison in pmem_do_bvec().
This has passed a boot test on an X86_32 config, which was the
architecture where issue #1 above was first noticed"
Dan Williams adds:
"We're giving this multi-maintainer setup a shot, so expect libnvdimm
pull requests from either Ross or I going forward"
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
libnvdimm, pmem: clarify the write+clear_poison+write flow
pmem: fix BUG() error in pmem.h:48 on X86_32
In the v4.4 cycle, we relaxed the requirement for assigning mtd->owner, but we
didn't remove this error case. It's hit only by drivers that are both:
(a) using nand_scan() directly and
(b) built as modules
We haven't seen explicit complaints about this (most use cases don't fit one or
both of the above), but we should definitely not be BUG()'ing here.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=wxaC
-----END PGP SIGNATURE-----
Merge tag 'for-linus-20160415' of git://git.infradead.org/linux-mtd
Pull MTD fix from Brian Norris:
"One MTD fix for v4.6-rc4:
In the v4.4 cycle, we relaxed the requirement for assigning
mtd->owner, but we didn't remove this error case. It's hit only
by drivers that are both:
(a) using nand_scan() directly
and
(b) built as modules
We haven't seen explicit complaints about this (most use cases don't
fit one or both of the above), but we should definitely not be
BUG()'ing here"
* tag 'for-linus-20160415' of git://git.infradead.org/linux-mtd:
mtd: nand: Drop mtd.owner requirement in nand_scan
- Restore similar old behaviour when assigning mmcblk device indexes
MMC host:
- tegra: Disable UHS-I modes for Tegra124 to fix regression
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=nnxN
-----END PGP SIGNATURE-----
Merge tag 'mmc-v4.6-rc3' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC fixes from Ulf Hansson:
"Here are a couple of mmc fixes intended for v4.6 rc4.
Regarding the fix for the regression about mmcblk device indexes. The
approach taken to solve the problem seems to be good enough. There
were some discussions around the solution, but it seems like people
were happy about it in the end.
MMC core:
- Restore similar old behaviour when assigning mmcblk device indexes
MMC host:
- tegra: Disable UHS-I modes for Tegra124 to fix regression"
* tag 'mmc-v4.6-rc3' of git://git.linaro.org/people/ulf.hansson/mmc:
mmc: tegra: Disable UHS-I modes for Tegra124
mmc: block: Use the mmc host device index as the mmcblk device index
Pull drm fixes from Dave Airlie:
"This contains fixes for exynos, amdgpu, radeon, i915 and qxl.
It also contains some fixes to the core drm edid parser.
qxl:
- fix for a cursor hotspot issue
radeon:
- some MST fixes that I've been running locally and make my monitor a
bit happier
exynos:
- fix some regressions and build fixes
amdgpu:
- a couple of small fixes
i915:
- two DP MST fixes and a couple of other regression fixes
Nothing too out of the ordinary or surprising at this point"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/exynos: Use VIDEO_SAMSUNG_S5P_G2D=n as G2D Kconfig dependency
drm/exynos: fix a warning message
drm/exynos: mic: fix an error code
drm/exynos: fimd: fix broken dp_clock control
drm/exynos: build fbdev code conditionally
drm/exynos: fix adjusted_mode pointer in exynos_plane_mode_set
drm/exynos: fix error handling in exynos_drm_subdrv_open
drm/amd/amdgpu: fix irq domain remove for tonga ih
drm/i915: fix deadlock on lid open
drm/radeon: use helper for mst connector dpms.
drm/radeon/mst: port some MST setup code from DAL.
drm/amdgpu: add invisible pin size statistic
drm/edid: Fix DMT 1024x768@43Hz (interlaced) timings
drm/i915: Exit cherryview_irq_handler() after one pass
drm/i915: Call intel_dp_mst_resume() before resuming displays
drm/i915: Fix race condition in intel_dp_destroy_mst_connector()
drm/edid: Fix parsing of EDID 1.4 Established Timings III descriptor
drm/edid: Fix EDID Established Timings I and II
drm/qxl: fix cursor position with non-zero hotspot
Pull parisc ftrace fixes from Helge Deller:
"This is (most likely) the last pull request for v4.6 for the parisc
architecture.
It fixes the FTRACE feature for parisc, which is horribly broken since
quite some time and doesn't even compile. This patch just fixes the
bare minimum (it actually removes more lines than it adds), so that
the function tracer works again on 32- and 64bit kernels.
I've queued up additional patches on top of this patch which e.g. add
the syscall tracer, but those have to wait for the merge window for
v4.7."
* 'parisc-4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Fix ftrace function tracer
The ACPI specification does not specify the state of data after a clear
poison operation. Potential future libnvdimm bus implementations for
other architectures also might not specify or disagree on the state of
data after clear poison. Clarify why we write twice.
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Starting from commit e36f620428(block: split bios to max possible length),
block core starts to split bio in the middle of bvec.
Unfortunately loop dio/aio doesn't consider this situation, and
always treat 'iter.iov_offset' as zero. Then filesystem corruption
is observed.
This patch figures out the offset of the base bvevc via
'bio->bi_iter.bi_bvec_done' and fixes the issue by passing the offset
to iov iterator.
Fixes: e36f620428 (block: split bios to max possible length)
Cc: Keith Busch <keith.busch@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org (4.5)
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Pull x86 fixes from Ingo Molnar:
"Misc fixes: a binutils fix, an lguest fix, an mcelog fix and a missing
documentation fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mce: Avoid using object after free in genpool
lguest, x86/entry/32: Fix handling of guest syscalls using interrupt gates
x86/build: Build compressed x86 kernels as PIE
x86/mm/pkeys: Add missing Documentation
Pull mm gup cleanup from Ingo Molnar:
"This removes the ugly get-user-pages API hack, now that all upstream
code has been migrated to it"
("ugly" is putting it mildly. But it worked.. - Linus)
* 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
mm/gup: Remove the macro overload API migration helpers from the get_user*() APIs
- stable@ fix for DM cache metadata's READ_LOCK macros that were
incorrectly returning error if the block manager was in read-only
mode; also cleanup multi-statement macros to use do {} while(0)
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJXEA8BAAoJEMUj8QotnQNauNoH/i5bVVPZTMKA3wzCpziuP08X
V5E9nLhd+Lvng05AZLsrTeIdvDfS7eAPQyFkPY9NpvzoJEAL0ft6bjGdaDTH090u
Y4mn08BcCwCzaJL41u43TGe3+iRZfUA/W7uu80SSaTuKq7EFeRha+LfyOUCwrNcT
P5LEPsl7EKhan3K3+9BrnX3IPG1MwswDAt9Sw0e83cyhFH5Xzy5AkygaSgHSamvf
/LJ3Hid8kCbdGseODJQ+sVg957+5H4mpZ3VUaTek/+DurCPpMFCxNQJTv2nxTd4h
AiEh+ed/RGzAP8hrZdtQTqKjc6ILiR0tRCtYX9WHDXLklkiJ5ZGKMgKyyrZYrzo=
=lzmV
-----END PGP SIGNATURE-----
Merge tag 'dm-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- fix a 4.6-rc1 bio-based DM 'struct dm_target_io' leak in an error
path
- stable@ fix for DM cache metadata's READ_LOCK macros that were
incorrectly returning error if the block manager was in read-only
mode; also cleanup multi-statement macros to use do {} while(0)
* tag 'dm-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros
dm: fix dm_target_io leak if clone_bio() returns an error
A single one-line fix to turn the regmap cache from an RB-tree to a flat
cache to avoid lockdep and abort issues.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=T3Vh
-----END PGP SIGNATURE-----
Merge tag 'pwm/for-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm fix from Thierry Reding:
"A single one-line fix to turn the regmap cache from an RB-tree to a
flat cache to avoid lockdep and abort issues"
* tag 'pwm/for-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: fsl-ftm: Use flat regmap cache
we've had a very calm development cycle, so far. Here are the few
fixes for HD-audio and USB-audio, all of which are small and easy.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=PYqq
-----END PGP SIGNATURE-----
Merge tag 'sound-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"We've had a very calm development cycle, so far. Here are the few
fixes for HD-audio and USB-audio, all of which are small and easy"
* tag 'sound-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Fix inconsistent monitor_present state until repoll
ALSA: hda - Fix regression of monitor_present flag in eld proc file
ALSA: usb-audio: Skip volume controls triggers hangup on Dell USB Dock
ALSA: hda/realtek - Enable the ALC292 dock fixup on the Thinkpad T460s
ALSA: sscape: Use correct format identifier for size_t
ALSA: usb-audio: Add a quirk for Plantronics BT300
ALSA: usb-audio: Add a sample rate quirk for Phoenix Audio TMX320
ALSA: hda - Bind with i915 only when Intel graphics is present
Pull mailbox fixes from Jussi Brar:
"Misc fixes:
mailbox-test driver:
- prevent memory leak and another cosmetic change
mailbox:
- change the returned error code
Xgene driver:
- return -ENOMEM instead of PTR_ERR for failed devm_kzalloc"
* 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
mailbox: Stop using ENOSYS for anything other than unimplemented syscalls
mailbox: mailbox-test: Prevent memory leak
mailbox: mailbox-test: Use more consistent format for calling copy_from_user()
mailbox: xgene-slimpro: Fix wrong test for devm_kzalloc
These patches fix f2fs and fscrypto based on -rc3 bug fixes in ext4 crypto,
which have not yet been fully propagated as follows.
- use of dget_parent and file_dentry to avoid crashes
- disallow RCU-mode lookup in d_invalidate
- disallow -ENOMEM in the core data encryption path
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=ML1+
-----END PGP SIGNATURE-----
Merge tag 'for-linus-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs/fscrypto fixes from Jaegeuk Kim:
"In addition to f2fs/fscrypto fixes, I've added one patch which
prevents RCU mode lookup in d_revalidate, as Al mentioned.
These patches fix f2fs and fscrypto based on -rc3 bug fixes in ext4
crypto, which have not yet been fully propagated as follows.
- use of dget_parent and file_dentry to avoid crashes
- disallow RCU-mode lookup in d_invalidate
- disallow -ENOMEM in the core data encryption path"
* tag 'for-linus-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
ext4/fscrypto: avoid RCU lookup in d_revalidate
fscrypto: don't let data integrity writebacks fail with ENOMEM
f2fs: use dget_parent and file_dentry in f2fs_file_open
fscrypto: use dget_parent() in fscrypt_d_revalidate()
Pull crypto fixes from Herbert Xu:
"This fixes an NFS regression caused by the skcipher/hash conversion in
sunrpc. It also fixes a build problem in certain configurations with
bcm63xx"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
hwrng: bcm63xx - fix device tree compilation
sunrpc: Fix skcipher/shash conversion
Pull keys bugfixes from James Morris:
"Two bugfixes for Keys related code"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
ASN.1: fix open failure check on headername
assoc_array: don't call compare_object() on a node
The READ_LOCK macro was incorrectly returning -EINVAL if
dm_bm_is_read_only() was true -- it will always be true once the cache
metadata transitions to read-only by dm_cache_metadata_set_read_only().
Wrap READ_LOCK and WRITE_LOCK multi-statement macros in do {} while(0).
Also, all accesses of the 'cmd' argument passed to these related macros
are now encapsulated in parenthesis.
A follow-up patch can be developed to eliminate the use of macros in
favor of pure C code. Avoiding that now given that this needs to apply
to stable@.
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Fixes: d14fcf3dd7 ("dm cache: make sure every metadata function checks fail_io")
Cc: stable@vger.kernel.org
