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Before this change, sienna_cichlid_get_reset_handler will always
return NULL, although the module parameter reset_method is 3
when loading amdgpu driver.
Signed-off-by: lyndonli <Lyndon.Li@amd.com>
Signed-off-by: Yunxiang Li <Yunxiang.Li@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
- Calculate correct argument pointer in real64_call_asm()
- Cleanup mmap implementation regarding color alignment (John David Anglin)
- Spinlock fixes in panic path (Guilherme G. Piccoli)
- build doc update for parisc64 (Randy Dunlap)
- Ensure page alignment in flush functions
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Merge tag 'parisc-for-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller:
"Two important fixes in here:
- The argument pointer register was wrong when calling 64-bit
firmware functions, which may cause random memory corruption or
crashes.
- Ensure page alignment in cache flush functions, otherwise not all
memory might get flushed.
The rest are cleanups (mmap implementation, panic path) and usual
smaller updates.
Summary:
- Calculate correct argument pointer in real64_call_asm()
- Cleanup mmap implementation regarding color alignment (John David
Anglin)
- Spinlock fixes in panic path (Guilherme G. Piccoli)
- build doc update for parisc64 (Randy Dunlap)
- Ensure page alignment in flush functions"
* tag 'parisc-for-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Fix argument pointer in real64_call_asm()
parisc: Cleanup mmap implementation regarding color alignment
parisc: Drop HP-UX constants and structs from grfioctl.h
parisc: Ensure page alignment in flush functions
parisc: Replace regular spinlock with spin_trylock on panic path
parisc: update kbuild doc. aliases for parisc64
parisc: Limit amount of kgdb breakpoints on parisc
There is only one fix by Arnd far for modules pending which came in after
the first pull request. The issue was found as part of some late compile
tests with 0-day. I take it 0-day does some secondary late builds with
after some initial ones.
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Merge tag 'modules-6.4-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
Pull modules fix from Luis Chamberlain:
"One fix by Arnd far for modules which came in after the first pull
request.
The issue was found as part of some late compile tests with 0-day. I
take it 0-day does some secondary late builds with after some initial
ones"
* tag 'modules-6.4-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
module: include internal.h in module/dups.c
As mentioned on my first pull request for sysctl-next, for v6.4-rc1
we're very close to being able to deprecating register_sysctl_paths().
I was going to assess the situation after the first week of the merge
window.
That time is now and things are looking good. We only have one stragglers
on the patch which had already an ACK for so I'm picking this up here now and
the last patch is the one that uses an axe. Some careful eyeballing would
be appreciated by others. If this doesn't get properly reviewed I can also
just hold off on this in my tree for the next merge window. Either way is
fine by me.
I have boot tested the last patch and 0-day build completed successfully.
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Merge tag 'sysctl-6.4-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
Pull more sysctl updates from Luis Chamberlain:
"As mentioned on my first pull request for sysctl-next, for v6.4-rc1
we're very close to being able to deprecating register_sysctl_paths().
I was going to assess the situation after the first week of the merge
window.
That time is now and things are looking good. We only have one which
had already an ACK for so I'm picking this up here now and the last
patch is the one that uses an axe.
I have boot tested the last patch and 0-day build completed
successfully"
* tag 'sysctl-6.4-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
sysctl: remove register_sysctl_paths()
kernel: pid_namespace: simplify sysctls with register_sysctl()
- Make stub data pages configurable
- Make it harder to mix user and kernel code by accident
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Merge tag 'uml-for-linus-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux
Pull uml updates from Richard Weinberger:
- Make stub data pages configurable
- Make it harder to mix user and kernel code by accident
* tag 'uml-for-linus-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux:
um: make stub data pages size tweakable
um: prevent user code in modules
um: further clean up user_syms
um: don't export printf()
um: hostfs: define our own API boundary
um: add __weak for exported functions
UBI:
- Fix error value for try_write_vid_and_data()
- Minor cleanups
UBIFS:
- Fixes for various memory leaks
- Minor cleanups
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Merge tag 'ubifs-for-linus-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI and UBIFS updates from Richard Weinberger:
"UBI:
- Fix error value for try_write_vid_and_data()
- Minor cleanups
UBIFS:
- Fixes for various memory leaks
- Minor cleanups"
* tag 'ubifs-for-linus-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubifs: Fix memleak when insert_old_idx() failed
Revert "ubifs: dirty_cow_znode: Fix memleak in error handling path"
ubifs: Fix memory leak in do_rename
ubifs: Free memory for tmpfile name
ubi: Fix return value overwrite issue in try_write_vid_and_data()
ubifs: Remove return in compr_exit()
ubi: Simplify bool conversion
- Make test_resume work again after the changes that made hibernation
open the snapshot device in exclusive mode (Chen Yu).
- Clean up code in several places in intel_idle (Artem Bityutskiy).
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Merge tag 'pm-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These fix a hibernation test mode regression and clean up the
intel_idle driver.
Specifics:
- Make test_resume work again after the changes that made hibernation
open the snapshot device in exclusive mode (Chen Yu)
- Clean up code in several places in intel_idle (Artem Bityutskiy)"
* tag 'pm-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
intel_idle: mark few variables as __read_mostly
intel_idle: do not sprinkle module parameter definitions around
intel_idle: fix confusing message
intel_idle: improve C-state flags handling robustness
intel_idle: further intel_idle_init_cstates_icpu() cleanup
intel_idle: clean up intel_idle_init_cstates_icpu()
intel_idle: use pr_info() instead of printk()
PM: hibernate: Do not get block device exclusively in test_resume mode
PM: hibernate: Turn snapshot_test into global variable
- Do not turn off unused power resources during initialization on the
Toshiba Click Mini (Hans de Goede).
- Support strings in device properties supplied by ACPI _DSM on Apple
platforms (Hector Martin).
- Add an ACPI device ID quirk for Lenovo Yoga Tablet 2 (Marius Hoch).
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Merge tag 'acpi-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"These add two ACPI-related quirks and extend support for Apple device
properties supplied via ACPI _DSM.
Specifics:
- Do not turn off unused power resources during initialization on the
Toshiba Click Mini (Hans de Goede)
- Support strings in device properties supplied by ACPI _DSM on Apple
platforms (Hector Martin)
- Add an ACPI device ID quirk for Lenovo Yoga Tablet 2 (Marius Hoch)"
* tag 'acpi-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: property: Support strings in Apple _DSM props
ACPI: x86: utils: Remove Lenovo Yoga Tablet 2's MAGN0001
ACPI: PM: Do not turn of unused power resources on the Toshiba Click Mini
- Add compatible DT bindings for imx6sll and imx6ul to fix a dtbs check
warning (Stefan Wahren).
- Update the example in the DT bindings to reflect changes with the
ADC node name for QCom TM and TM5 (Marijn Suijten).
- Fix comments for the cpuidle_cooling_register() function to match the
function prototype (Chenggang Wang).
- Fix inconsistent temperature read and some Mediatek variant board
reboot by reverting a change and handling the temperature
differently (AngeloGioacchino Del Regno).
- Fix a memory leak in the initialization error path for the Mediatek
driver (Kang Chen).
- Use of_address_to_resource() in the Mediatek driver (Rob Herring).
- Fix unit address in the QCom tsens driver DT bindings (Krzysztof
Kozlowski).
- Clean up the step-wise thermal governor (Zhang Rui).
- Introduce thermal_zone_device() for accessing the device field of
struct thermal_zone_device and two drivers use it (Daniel Lezcano).
- Clean up the ACPI thermal driver a bit (Daniel Lezcano).
- Delete the thermal driver for Intel Menlow platforms that is not
expected to have any users (Rafael Wysocki).
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Merge tag 'thermal-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more thermal control updates from Rafael Wysocki:
"These are mostly cleanups on top of the previously merged thermal
control changes plus some driver fixes and the removal of the Intel
Menlow thermal driver.
Specifics:
- Add compatible DT bindings for imx6sll and imx6ul to fix a dtbs
check warning (Stefan Wahren)
- Update the example in the DT bindings to reflect changes with the
ADC node name for QCom TM and TM5 (Marijn Suijten)
- Fix comments for the cpuidle_cooling_register() function to match
the function prototype (Chenggang Wang)
- Fix inconsistent temperature read and some Mediatek variant board
reboot by reverting a change and handling the temperature
differently (AngeloGioacchino Del Regno)
- Fix a memory leak in the initialization error path for the Mediatek
driver (Kang Chen)
- Use of_address_to_resource() in the Mediatek driver (Rob Herring)
- Fix unit address in the QCom tsens driver DT bindings (Krzysztof
Kozlowski)
- Clean up the step-wise thermal governor (Zhang Rui)
- Introduce thermal_zone_device() for accessing the device field of
struct thermal_zone_device and two drivers use it (Daniel Lezcano)
- Clean up the ACPI thermal driver a bit (Daniel Lezcano)
- Delete the thermal driver for Intel Menlow platforms that is not
expected to have any users (Rafael Wysocki)"
* tag 'thermal-6.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: intel: menlow: Get rid of this driver
ACPI: thermal: Move to dedicated function sysfs extra attr creation
ACPI: thermal: Use thermal_zone_device()
thermal: intel: pch_thermal: Use thermal driver device to write a trace
thermal: core: Encapsulate tz->device field
thermal: gov_step_wise: Adjust code logic to match comment
thermal: gov_step_wise: Delete obsolete comment
dt-bindings: thermal: qcom-tsens: Correct unit address
thermal/drivers/mediatek: Use of_address_to_resource()
thermal/drivers/mediatek: Change clk_prepare_enable to devm_clk_get_enabled in mtk_thermal_probe
thermal/drivers/mediatek: Use devm_of_iomap to avoid resource leak in mtk_thermal_probe
thermal/drivers/mediatek: Add temperature constraints to validate read
Revert "thermal/drivers/mediatek: Add delay after thermal banks initialization"
thermal/drivers/cpuidle_cooling: Delete unmatched comments
dt-bindings: thermal: Use generic ADC node name in examples
dt-bindings: imx-thermal: Add imx6sll and imx6ul compatible
The bulk of this is trivial conversions to the new .remove_new()
callback for drivers as part of Uwe's effort to clean that up.
Other than that a driver is added for Apple devices and various small
fixes are included for existing drivers.
Last but not least, this finally gets rid of the old pwm_request() and
pwm_free() APIs are removed since the last user was dropped in v6.3.
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Merge tag 'pwm/for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"The bulk of this is trivial conversions to the new .remove_new()
callback for drivers as part of Uwe's effort to clean that up.
Other than that a driver is added for Apple devices and various small
fixes are included for existing drivers.
Last but not least, this finally gets rid of the old pwm_request() and
pwm_free() APIs are removed since the last user was dropped in v6.3"
* tag 'pwm/for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (44 commits)
pwm: Remove unused radix tree
pwm: Delete deprecated functions pwm_request() and pwm_free()
pwm: meson: Fix g12a ao clk81 name
pwm: meson: Fix axg ao mux parents
pwm: stm32: Enforce settings for PWM capture
MAINTAINERS: Add entries for Apple PWM driver
pwm: Add Apple PWM controller
dt-bindings: pwm: Add Apple PWM controller
pwm: mtk-disp: Configure double buffering before reading in .get_state()
pwm: mtk-disp: Disable shadow registers before setting backlight values
pwm: stm32-lp: Drop of_match_ptr for ID table
pwm: rcar: Drop of_match_ptr for ID table
dt-bindings: pwm: Convert Amlogic Meson PWM binding
dt-bindings: pwm: mediatek: Add mediatek,mt7986 compatible
pwm: xilinx: Convert to platform remove callback returning void
pwm: vt8500: Convert to platform remove callback returning void
pwm: tiehrpwm: Convert to platform remove callback returning void
pwm: tiecap: Convert to platform remove callback returning void
pwm: tegra: Convert to platform remove callback returning void
pwm: sun4i: Convert to platform remove callback returning void
...
- New support:
- UFS PHY for Qualcomm SA8775p, SM7150
- PCIe 2 lane phy support for sc8180x and PCIe PHY for SDX65
- Mediatke hdmi phy support for mt8195
- rockchip naneng combo phy support for RK358
- Updates:
- Drop Thunder Bay eMMC PHY driver
- RC support for PCIe phy for Qualcomm SDX55
- SGMII support in WIZ driver for J721E
- PCIe and multilink SGMII PHY support in cadence driver
- Big pile of platform remove callback returning void conversions
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Merge tag 'phy-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy
Pull phy updates from Vinod Koul:
"New support:
- UFS PHY for Qualcomm SA8775p, SM7150
- PCIe 2 lane phy support for sc8180x and PCIe PHY for SDX65
- Mediatke hdmi phy support for mt8195
- rockchip naneng combo phy support for RK358
Updates:
- Drop Thunder Bay eMMC PHY driver
- RC support for PCIe phy for Qualcomm SDX55
- SGMII support in WIZ driver for J721E
- PCIe and multilink SGMII PHY support in cadence driver
- Big pile of platform remove callback returning void conversions"
* tag 'phy-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy: (77 commits)
phy: cadence: cdns-dphy-rx: Add common module reset support
phy: ti: j721e-wiz: Add SGMII support in WIZ driver for J721E
dt-bindings: phy: ti: phy-gmii-sel: Add support for J784S4 CPSW9G
phy: ti: j721e-wiz: Fix unreachable code in wiz_mode_select()
phy: cadence: Sierra: Add PCIe + SGMII PHY multilink configuration
phy: mediatek: add support for phy-mtk-hdmi-mt8195
phy: phy-mtk-hdmi: Add generic phy configure callback
dt-bindings: phy: mediatek: hdmi-phy: Add mt8195 compatible
phy: tegra: xusb: Add missing tegra_xusb_port_unregister for usb2_port and ulpi_port
dt-bindings: phy: ti,phy-j721e-wiz: document clock-output-names
dt-bindings: phy: ti,phy-j721e-wiz: drop assigned-clocks
dt-bindings: phy: ti,phy-am654-serdes: drop assigned-clocks type
dt-bindings: phy: cadence-torrent: drop assigned-clocks
dt-bindings: phy: cadence-sierra: drop assigned-clocks
phy: rockchip: remove unused hw_to_inno function
phy: qualcomm: phy-qcom-qmp-ufs: add definitions for sa8775p
dt-bindings: phy: qmp-ufs: describe the UFS PHY for sa8775p
phy: qcom-qmp-pcie: drop sdm845_qhp_pcie_rx_tbl
phy: qcom-qmp-pcie: sc8180x PCIe PHY has 2 lanes
phy: qcom-qmp-ufs: Add SM7150 support
...
New support:
- Apple admac t8112 device support
- StarFive JH7110 DMA controller
Updates:
- Big pile of idxd updates to support IAA 2.0 device capabilities, DSA
2.0 Event Log and completion record faulting features and new DSA
operations
- at_xdmac supend & resume updates and driver code cleanup
- k3-udma supend & resume support
- k3-psil thread support for J784s4
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Merge tag 'dmaengine-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
Pull dmaengine updates from Vinod Koul:
"New support:
- Apple admac t8112 device support
- StarFive JH7110 DMA controller
Updates:
- Big pile of idxd updates to support IAA 2.0 device capabilities,
DSA 2.0 Event Log and completion record faulting features and
new DSA operations
- at_xdmac supend & resume updates and driver code cleanup
- k3-udma supend & resume support
- k3-psil thread support for J784s4"
* tag 'dmaengine-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (57 commits)
dmaengine: idxd: add per wq PRS disable
dmaengine: idxd: add pid to exported sysfs attribute for opened file
dmaengine: idxd: expose fault counters to sysfs
dmaengine: idxd: add a device to represent the file opened
dmaengine: idxd: add per file user counters for completion record faults
dmaengine: idxd: process batch descriptor completion record faults
dmaengine: idxd: add descs_completed field for completion record
dmaengine: idxd: process user page faults for completion record
dmaengine: idxd: add idxd_copy_cr() to copy user completion record during page fault handling
dmaengine: idxd: create kmem cache for event log fault items
dmaengine: idxd: add per DSA wq workqueue for processing cr faults
dmanegine: idxd: add debugfs for event log dump
dmaengine: idxd: add interrupt handling for event log
dmaengine: idxd: setup event log configuration
dmaengine: idxd: add event log size sysfs attribute
dmaengine: idxd: make misc interrupt one shot
dt-bindings: dma: snps,dw-axi-dmac: constrain the items of resets for JH7110 dma
dt-bindings: dma: Drop unneeded quotes
dmaengine: at_xdmac: align declaration of ret with the rest of variables
dmaengine: at_xdmac: add a warning message regarding for unpaused channels
...
The changes for the hte/timestamp subsystem include the following:
- Add Tegra234 HTE provider and relevant DT bindings
- Update MAINTAINERS file for the HTE subsystem
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Merge tag 'for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen1984/linux
Pull hardware timestamp engine updates from Dipen Patel:
"The changes for the hte subsystem include:
- Add Tegra234 HTE provider and relevant DT bindings
- Update MAINTAINERS file for the HTE subsystem"
* tag 'for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen1984/linux:
hte: tegra-194: Use proper includes
hte: Use device_match_of_node()
hte: tegra-194: Fix off by one in tegra_hte_map_to_line_id()
hte: tegra: fix 'struct of_device_id' build error
hte: Use of_property_present() for testing DT property presence
gpio: tegra186: Add Tegra234 hte support
hte: handle nvidia,gpio-controller property
hte: Deprecate nvidia,slices property
hte: Add Tegra234 provider
hte: Re-phrase tegra API document
arm64: tegra: Add Tegra234 GTE nodes
dt-bindings: timestamp: Deprecate nvidia,slices property
dt-bindings: timestamp: Add Tegra234 support
MAINTAINERS: Add HTE/timestamp subsystem details
Dave Hansen found the "(long) addr >= 0" code in the x86-64 access_ok
checks somewhat confusing, and suggested using a helper to clarify what
the code is doing.
So this does exactly that: clarifying what the sign bit check is all
about, by adding a helper macro that makes it clear what it is testing.
This also adds some explicit comments talking about how even with LAM
enabled, any addresses with the sign bit will still GP-fault in the
non-canonical region just above the sign bit.
This is all what allows us to do the user address checks with just the
sign bit, and furthermore be a bit cavalier about accesses that might be
done with an additional offset even past that point.
(And yes, this talks about 'positive' even though zero is also a valid
user address and so technically we should call them 'non-negative'. But
I don't think using 'non-negative' ends up being more understandable).
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The intent of the sign games was to not modify kernel addresses when
untagging them. However, that had two issues:
(a) it didn't actually work as intended, since the mask was calculated
as 'addr >> 63' on an _unsigned_ address. So instead of getting a
mask of all ones for kernel addresses, you just got '1'.
(b) untagging a kernel address isn't actually a valid operation anyway.
Now, (a) had originally been true for both 'untagged_addr()' and the
remote version of it, but had accidentally been fixed for the regular
version of untagged_addr() by commit e0bddc19ba ("x86/mm: Reduce
untagged_addr() overhead for systems without LAM"). That one rewrote
the shift to be part of the alternative asm code, and in the process
changed the unsigned shift into a signed 'sar' instruction.
And while it is true that we don't want to turn what looks like a kernel
address into a user address by masking off the high bit, that doesn't
need these sign masking games - all it needs is that the mm context
'untag_mask' value has the high bit set.
Which it always does.
So simplify the code by just removing the superfluous (and in the case
of untagged_addr_remote(), still buggy) sign bit games in the address
masking.
Acked-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The x86 <asm/uaccess.h> file has grown features that are specific to
x86-64 like LAM support and the related access_ok() changes. They
really should be in the <asm/uaccess_64.h> file and not pollute the
generic x86 header.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There's already a generic definition of 'access_ok()' in the
asm-generic/access_ok.h header file, and the only difference bwteen that
and the x86-specific one is the added check for WARN_ON_IN_IRQ().
And it turns out that the reason for that check is long gone: it used to
use a "user_addr_max()" inline function that depended on the current
thread, and caused problems in non-thread contexts.
For details, see commits 7c4788950b ("x86/uaccess, sched/preempt:
Verify access_ok() context") and in particular commit ae31fe51a3
("perf/x86: Restore TASK_SIZE check on frame pointer") about how and why
this came to be.
But that "current task" issue was removed in the big set_fs() removal by
Christoph Hellwig in commit 47058bb54b ("x86: remove address space
overrides using set_fs()").
So the reason for the test and the architecture-specific access_ok()
define no longer exists, and is actually harmful these days. For
example, it led various 'copy_from_user_nmi()' games (eg using
__range_not_ok() instead, and then later converted to __access_ok() when
that became ok).
And that in turn meant that LAM was broken for the frame following
before this series, because __access_ok() used to not do the address
untagging.
Accessing user state still needs care in many contexts, but access_ok()
is not the place for this test.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Linus Torvalds torvalds@linux-foundation.org>
The linear address masking (LAM) code made access_ok() more complicated,
in that it now needs to untag the address in order to verify the access
range. See commit 74c228d20a ("x86/uaccess: Provide untagged_addr()
and remove tags before address check").
We were able to avoid that overhead in the get_user/put_user code paths
by simply using the sign bit for the address check, and depending on the
GP fault if the address was non-canonical, which made it all independent
of LAM.
And we can do the same thing for access_ok(): simply check that the user
pointer range has the high bit clear. No need to bother with any
address bit masking.
In fact, we can go a bit further, and just check the starting address
for known small accesses ranges: any accesses that overflow will still
be in the non-canonical area and will still GP fault.
To still make syzkaller catch any potentially unchecked user addresses,
we'll continue to warn about GP faults that are caused by accesses in
the non-canonical range. But we'll limit that to purely "high bit set
and past the one-page 'slop' area".
We could probably just do that "check only starting address" for any
arbitrary range size: realistically all kernel accesses to user space
will be done starting at the low address. But let's leave that kind of
optimization for later. As it is, this already allows us to generate
simpler code and not worry about any tag bits in the address.
The one thing to look out for is the GUP address check: instead of
actually copying data in the virtual address range (and thus bad
addresses being caught by the GP fault), GUP will look up the page
tables manually. As a result, the page table limits need to be checked,
and that was previously implicitly done by the access_ok().
With the relaxed access_ok() check, we need to just do an explicit check
for TASK_SIZE_MAX in the GUP code instead. The GUP code already needs
to do the tag bit unmasking anyway, so there this is all very
straightforward, and there are no LAM issues.
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This file defines both read and write operations, yet it is being
created as read-only. This means that it can't be written to without the
CAP_DAC_OVERRIDE capability. Fix the permissions to allow root to write
to it without the need to override DAC perms.
Link: https://lore.kernel.org/linux-trace-kernel/20230503140114.3280002-1-omosnace@redhat.com
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: 03329f9939 ("tracing: Add tracefs file buffer_percentage")
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Fix the argument pointer (ap) to point to real-mode memory
instead of virtual memory.
It's interesting that this issue hasn't shown up earlier, as this could
have happened with any 64-bit PDC ROM code.
I just noticed it because I suddenly faced a HPMC while trying to execute
the 64-bit STI ROM code of an Visualize-FXe graphics card for the STI
text console.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org>
This change simplifies the randomization of file mapping regions. It
reworks the code to remove duplication. The flow is now similar to
that for mips. Finally, we consistently use the do_color_align variable
to determine when color alignment is needed.
Tested on rp3440.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Matthew Wilcox noticed, that if ARCH_HAS_FLUSH_ON_KUNMAP is defined
(which is the case for PA-RISC), __kunmap_local() calls
kunmap_flush_on_unmap(), which may call the parisc flush functions with
a non-page-aligned address and thus the page might not be fully flushed.
This patch ensures that flush_kernel_dcache_page_asm() and
flush_kernel_dcache_page_asm() will always operate on page-aligned
addresses.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v6.0+
The panic notifiers' callbacks execute in an atomic context, with
interrupts/preemption disabled, and all CPUs not running the panic
function are off, so it's very dangerous to wait on a regular
spinlock, there's a risk of deadlock.
Refactor the panic notifier of parisc/power driver to make use
of spin_trylock - for that, we've added a second version of the
soft-power function. Also, some comments were reorganized and
trailing white spaces, useless header inclusion and blank lines
were removed.
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jeroen Roovers <jer@xs4all.nl>
Acked-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Signed-off-by: Helge Deller <deller@gmx.de>
ARCH=parisc64 is now supported for 64-bit parisc builds, so add
this alias to the kbuild.rst documentation.
Fixes: 3dcfb729b5 ("parisc: Make CONFIG_64BIT available for ARCH=parisc64 only")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Merge hibernation test mode fix for 6.4-rc1.
* pm-sleep:
PM: hibernate: Do not get block device exclusively in test_resume mode
PM: hibernate: Turn snapshot_test into global variable
Merge an ACPI power management quirk and a change related to the
handling of ACPI device properties for 6.4-rc1:
- Do not turn off unused power resources during initialization on the
Toshiba Click Mini (Hans de Goede).
- Support strings in device properties supplied by ACPI _DSM on Apple
platforms (Hector Martin).
* acpi-pm:
ACPI: PM: Do not turn of unused power resources on the Toshiba Click Mini
* acpi-properties:
ACPI: property: Support strings in Apple _DSM props
Merge additional thermal core and ACPI thermal changes for 6.4-rc1:
- Clean up the step-wise thermal governor (Zhang Rui).
- Introduce thermal_zone_device() for accessing the device field of
struct thermal_zone_device and two drivers use it (Daniel Lezcano).
- Clean up the ACPI thermal driver a bit (Daniel Lezcano).
- Delete the thermal driver for Intel Menlow platforms that is not
expected to have any users (Rafael Wysocki).
* thermal-core:
thermal: intel: menlow: Get rid of this driver
ACPI: thermal: Move to dedicated function sysfs extra attr creation
ACPI: thermal: Use thermal_zone_device()
thermal: intel: pch_thermal: Use thermal driver device to write a trace
thermal: core: Encapsulate tz->device field
thermal: gov_step_wise: Adjust code logic to match comment
thermal: gov_step_wise: Delete obsolete comment
The intel_dsi_msleep() helper skips sleeping if the MIPI-sequences have
a version of 3 or newer and the panel is in vid-mode.
This is based on the big comment around line 730 which starts with
"Panel enable/disable sequences from the VBT spec.", where
the "v3 video mode seq" column does not have any wait t# entries.
Checking the Windows driver shows that it does always honor
the VBT delays independent of the version of the VBT sequences.
Commit 6fdb335f1c ("drm/i915/dsi: Use unconditional msleep for
the panel_on_delay when there is no reset-deassert MIPI-sequence")
switched to a direct msleep() instead of intel_dsi_msleep()
when there is no MIPI_SEQ_DEASSERT_RESET sequence, to fix
the panel on an Acer Aspire Switch 10 E SW3-016 not turning on.
And now testing on a Nextbook Ares 8A shows that panel_on_delay
must always be honored otherwise the panel will not turn on.
Instead of only always using regular msleep() for panel_on_delay
do as Windows does and always use regular msleep() everywhere
were intel_dsi_msleep() is used and drop the intel_dsi_msleep()
helper.
Changes in v2:
- Replace all intel_dsi_msleep() calls instead of just
the intel_dsi_msleep(panel_on_delay) call
Cc: stable@vger.kernel.org
Fixes: 6fdb335f1c ("drm/i915/dsi: Use unconditional msleep for the panel_on_delay when there is no reset-deassert MIPI-sequence")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230425194441.68086-1-hdegoede@redhat.com
(cherry picked from commit fa83c12132)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
CPU transcoder mask is used to iterate over the available
CPU transcoders in the macro for_each_cpu_transcoder().
The macro is broken on MTL and got highlighted when audio
state was being tracked for each transcoder added in [1].
Add the missing CPU transcoder mask which is similar to ADL-P
mask but without DSI transcoders.
[1]: https://patchwork.freedesktop.org/patch/523723/
Fixes: 7835303982 ("drm/i915/mtl: Add MeteorLake PCI IDs")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Acked-by: Haridhar Kalvala <haridhar.kalvala@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230420221248.2511314-1-radhakrishna.sripada@intel.com
(cherry picked from commit bddc18913b)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Dan Carpenter pointed out that 'err' was not being set in the case
where the GuC firmware version range check fails. Fix that.
Note that while this is a bug fix for a previous patch (see Fixes tag
below). It is an exceedingly low risk bug. The range check is
asserting that the GuC firmware version is within spec. So it should
not be possible to ever have a firmware file that fails this check. If
larger version numbers are required in the future, that would be a
backwards breaking spec change and thus require a major version bump,
in which case an old i915 driver would not load that new version anyway.
Fixes: 9bbba0667f ("drm/i915/guc: Use GuC submission API version number")
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230421224742.2357198-1-John.C.Harrison@Intel.com
(cherry picked from commit 80ab317990)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Two newly introduced functions are declared in a header that is not
included before the definition, causing a warning with sparse or
'make W=1':
kernel/module/dups.c:118:6: error: no previous prototype for 'kmod_dup_request_exists_wait' [-Werror=missing-prototypes]
118 | bool kmod_dup_request_exists_wait(char *module_name, bool wait, int *dup_ret)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/module/dups.c:220:6: error: no previous prototype for 'kmod_dup_request_announce' [-Werror=missing-prototypes]
220 | void kmod_dup_request_announce(char *module_name, int ret)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
Add an explicit include to ensure the prototypes match.
Fixes: 8660484ed1 ("module: add debugging auto-load duplicate module support")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202304141440.DYO4NAzp-lkp@intel.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
The deprecation for register_sysctl_paths() is over. We can rejoice as
we nuke register_sysctl_paths(). The routine register_sysctl_table()
was the only user left of register_sysctl_paths(), so we can now just
open code and move the implementation over to what used to be
to __register_sysctl_paths().
The old dynamic struct ctl_table_set *set is now the point to
sysctl_table_root.default_set.
The old dynamic const struct ctl_path *path was being used in the
routine register_sysctl_paths() with a static:
static const struct ctl_path null_path[] = { {} };
Since this is a null path we can now just simplfy the old routine
and remove its use as its always empty.
This saves us a total of 230 bytes.
$ ./scripts/bloat-o-meter vmlinux.old vmlinux
add/remove: 2/7 grow/shrink: 1/1 up/down: 1015/-1245 (-230)
Function old new delta
register_leaf_sysctl_tables.constprop - 524 +524
register_sysctl_table 22 497 +475
__pfx_register_leaf_sysctl_tables.constprop - 16 +16
null_path 8 - -8
__pfx_register_sysctl_paths 16 - -16
__pfx_register_leaf_sysctl_tables 16 - -16
__pfx___register_sysctl_paths 16 - -16
__register_sysctl_base 29 12 -17
register_sysctl_paths 18 - -18
register_leaf_sysctl_tables 534 - -534
__register_sysctl_paths 620 - -620
Total: Before=21259666, After=21259436, chg -0.00%
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
register_sysctl_paths() is only required if your child (directories)
have entries and pid_namespace does not. So use register_sysctl_init()
instead where we don't care about the return value and use
register_sysctl() where we do.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Jeff Xu <jeffxu@google.com>
Link: https://lore.kernel.org/r/20230302202826.776286-9-mcgrof@kernel.org
Change CONFIG_PER_VMA_LOCK_STATS to be disabled by default, as most users
don't need it. Add configuration help to clarify its usage.
Link: https://lkml.kernel.org/r/20230428173533.18158-1-surenb@google.com
Fixes: 52f238653e ("mm: introduce per-VMA lock statistics")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Lorenzo Stoakes <lstoakes@gmail.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
@xilinx.com is still working but better to switch to new amd.com after
AMD/Xilinx acquisition.
Link: https://lkml.kernel.org/r/bd073d026f8c367a9cfb45d26d39f26e40c665dc.1683035692.git.michal.simek@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kirill Tkhai <tkhai@ya.ru>
Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: Qais Yousef <qyousef@layalina.io>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The refactoring in commit f4e9e0e694 ("mm/mempolicy: fix use-after-free
of VMA iterator") introduces a subtle bug which arises when attempting to
apply a new NUMA policy across a range of VMAs in mbind_range().
The refactoring passes a **prev pointer to keep track of the previous VMA
in order to reduce duplication, and in all but one case it keeps this
correctly updated.
The bug arises when a VMA within the specified range has an equivalent
policy as determined by mpol_equal() - which unlike other cases, does not
update prev.
This can result in a situation where, later in the iteration, a VMA is
found whose policy does need to change. At this point, vma_merge() is
invoked with prev pointing to a VMA which is before the previous VMA.
Since vma_merge() discovers the curr VMA by looking for the one
immediately after prev, it will now be in a situation where this VMA is
incorrect and the merge will not proceed correctly.
This is checked in the VM_WARN_ON() invariant case with end >
curr->vm_end, which, if a merge is possible, results in a warning (if
CONFIG_DEBUG_VM is specified).
I note that vma_merge() performs these invariant checks only after
merge_prev/merge_next are checked, which is debatable as it hides this
issue if no merge is possible even though a buggy situation has arisen.
The solution is simply to update the prev pointer even when policies are
equal.
This caused a bug to arise in the 6.2.y stable tree, and this patch
resolves this bug.
Link: https://lkml.kernel.org/r/83f1d612acb519d777bebf7f3359317c4e7f4265.1682866629.git.lstoakes@gmail.com
Fixes: f4e9e0e694 ("mm/mempolicy: fix use-after-free of VMA iterator")
Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Link: https://lore.kernel.org/oe-lkp/202304292203.44ddeff6-oliver.sang@intel.com
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
There is a crash in relay_file_read, as the var from
point to the end of last subbuf.
The oops looks something like:
pc : __arch_copy_to_user+0x180/0x310
lr : relay_file_read+0x20c/0x2c8
Call trace:
__arch_copy_to_user+0x180/0x310
full_proxy_read+0x68/0x98
vfs_read+0xb0/0x1d0
ksys_read+0x6c/0xf0
__arm64_sys_read+0x20/0x28
el0_svc_common.constprop.3+0x84/0x108
do_el0_svc+0x74/0x90
el0_svc+0x1c/0x28
el0_sync_handler+0x88/0xb0
el0_sync+0x148/0x180
We get the condition by analyzing the vmcore:
1). The last produced byte and last consumed byte
both at the end of the last subbuf
2). A softirq calls function(e.g __blk_add_trace)
to write relay buffer occurs when an program is calling
relay_file_read_avail().
relay_file_read
relay_file_read_avail
relay_file_read_consume(buf, 0, 0);
//interrupted by softirq who will write subbuf
....
return 1;
//read_start point to the end of the last subbuf
read_start = relay_file_read_start_pos
//avail is equal to subsize
avail = relay_file_read_subbuf_avail
//from points to an invalid memory address
from = buf->start + read_start
//system is crashed
copy_to_user(buffer, from, avail)
Link: https://lkml.kernel.org/r/20230419040203.37676-1-zhang.zhengming@h3c.com
Fixes: 8d62fdebda ("relay file read: start-pos fix")
Signed-off-by: Zhang Zhengming <zhang.zhengming@h3c.com>
Reviewed-by: Zhao Lei <zhao_lei1@hoperun.com>
Reviewed-by: Zhou Kete <zhou.kete@h3c.com>
Reviewed-by: Pengcheng Yang <yangpc@wangsu.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
dump_user_range() is used to copy the user page to a coredump file, but if
a hardware memory error occurred during copy, which called from
__kernel_write_iter() in dump_user_range(), it crashes,
CPU: 112 PID: 7014 Comm: mca-recover Not tainted 6.3.0-rc2 #425
pc : __memcpy+0x110/0x260
lr : _copy_from_iter+0x3bc/0x4c8
...
Call trace:
__memcpy+0x110/0x260
copy_page_from_iter+0xcc/0x130
pipe_write+0x164/0x6d8
__kernel_write_iter+0x9c/0x210
dump_user_range+0xc8/0x1d8
elf_core_dump+0x308/0x368
do_coredump+0x2e8/0xa40
get_signal+0x59c/0x788
do_signal+0x118/0x1f8
do_notify_resume+0xf0/0x280
el0_da+0x130/0x138
el0t_64_sync_handler+0x68/0xc0
el0t_64_sync+0x188/0x190
Generally, the '->write_iter' of file ops will use copy_page_from_iter()
and copy_page_from_iter_atomic(), change memcpy() to copy_mc_to_kernel()
in both of them to handle #MC during source read, which stop coredump
processing and kill the task instead of kernel panic, but the source
address may not always a user address, so introduce a new copy_mc flag in
struct iov_iter{} to indicate that the iter could do a safe memory copy,
also introduce the helpers to set/cleck the flag, for now, it's only used
in coredump's dump_user_range(), but it could expand to any other
scenarios to fix the similar issue.
Link: https://lkml.kernel.org/r/20230417045323.11054-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Tong Tiangen <tongtiangen@huawei.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Now the __pageblock_pfn_to_page() is used by set_zone_contiguous(), which
checks whether the given zone contains holes, and uses
pfn_to_online_page() to validate if the start pfn is online and valid, as
well as using pfn_valid() to validate the end pfn.
However, the __pageblock_pfn_to_page() function may return non-NULL even
if the end pfn of a pageblock is in a memory hole in some situations. For
example, if the pageblock order is MAX_ORDER, which will fall into 2
sub-sections, and the end pfn of the pageblock may be hole even though the
start pfn is online and valid.
See below memory layout as an example and suppose the pageblock order is
MAX_ORDER.
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000040000000-0x00000000ffffffff]
[ 0.000000] DMA32 empty
[ 0.000000] Normal [mem 0x0000000100000000-0x0000001fa7ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000040000000-0x0000001fa3c7ffff]
[ 0.000000] node 0: [mem 0x0000001fa3c80000-0x0000001fa3ffffff]
[ 0.000000] node 0: [mem 0x0000001fa4000000-0x0000001fa402ffff]
[ 0.000000] node 0: [mem 0x0000001fa4030000-0x0000001fa40effff]
[ 0.000000] node 0: [mem 0x0000001fa40f0000-0x0000001fa73cffff]
[ 0.000000] node 0: [mem 0x0000001fa73d0000-0x0000001fa745ffff]
[ 0.000000] node 0: [mem 0x0000001fa7460000-0x0000001fa746ffff]
[ 0.000000] node 0: [mem 0x0000001fa7470000-0x0000001fa758ffff]
[ 0.000000] node 0: [mem 0x0000001fa7590000-0x0000001fa7dfffff]
Focus on the last memory range, and there is a hole for the range [mem
0x0000001fa7590000-0x0000001fa7dfffff]. That means the last pageblock
will contain the range from 0x1fa7c00000 to 0x1fa7ffffff, since the
pageblock must be 4M aligned. And in this pageblock, these pfns will fall
into 2 sub-section (the sub-section size is 2M aligned).
So, the 1st sub-section (indicates pfn range: 0x1fa7c00000 - 0x1fa7dfffff
) in this pageblock is valid by calling subsection_map_init() in
free_area_init(), but the 2nd sub-section (indicates pfn range:
0x1fa7e00000 - 0x1fa7ffffff ) in this pageblock is not valid.
This did not break anything until now, but the zone continuous is fragile
in this possible scenario. So as previous discussion[1], it is better to
add some comments to explain this possible issue in case there are some
future pfn walkers that rely on this.
[1] https://lore.kernel.org/all/87r0sdsmr6.fsf@yhuang6-desk2.ccr.corp.intel.com/
Link: https://lkml.kernel.org/r/5c26368865e79c743a453dea48d30670b19d2e4f.1682425534.git.baolin.wang@linux.alibaba.com
Link: https://lkml.kernel.org/r/5c26368865e79c743a453dea48d30670b19d2e4f.1682425534.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Let's factor out actual disabling of KSM. The existing "mm->def_flags &=
~VM_MERGEABLE;" was essentially a NOP and can be dropped, because
def_flags should never include VM_MERGEABLE. Note that we don't currently
prevent re-enabling KSM.
This should now be faster in case KSM was never enabled, because we only
conditionally iterate all VMAs. Further, it certainly looks cleaner.
Link: https://lkml.kernel.org/r/20230422210156.33630-1-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Stefan Roesch <shr@devkernel.io>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Let's test whether setting PR_SET_MEMORY_MERGE to 0 after setting it to 1
will unmerge pages, similar to how setting MADV_UNMERGEABLE after setting
MADV_MERGEABLE would.
Link: https://lkml.kernel.org/r/20230422205420.30372-3-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Stefan Roesch <shr@devkernel.io>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "mm/ksm: improve PR_SET_MEMORY_MERGE=0 handling and cleanup
disabling KSM", v2.
(1) Make PR_SET_MEMORY_MERGE=0 unmerge pages like setting MADV_UNMERGEABLE
does, (2) add a selftest for it and (3) factor out disabling of KSM from
s390/gmap code.
This patch (of 3):
Let's unmerge any KSM pages when setting PR_SET_MEMORY_MERGE=0, and clear
the VM_MERGEABLE flag from all VMAs -- just like KSM would. Of course,
only do that if we previously set PR_SET_MEMORY_MERGE=1.
Link: https://lkml.kernel.org/r/20230422205420.30372-1-david@redhat.com
Link: https://lkml.kernel.org/r/20230422205420.30372-2-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Stefan Roesch <shr@devkernel.io>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The *folio_sz in damon_pa_young() will be used(as last_folio_sz) by
__damon_pa_check_access(), so it's need to be updated, fix missing branch.
Link: https://lkml.kernel.org/r/20230308083311.120951-4-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
