Claudiu Beznea [Wed, 27 Jan 2021 11:45:44 +0000 (13:45 +0200)]
pinctrl: at91-pio4: add support for slew-rate
SAMA7G5 supports slew rate configuration. Adapt the driver for this.
For output switching frequencies lower than 50MHz the slew rate needs to
be enabled. Since most of the pins on SAMA7G5 fall into this category
enabled the slew rate by default.
Linus Walleij [Fri, 12 Feb 2021 08:11:48 +0000 (09:11 +0100)]
pinctrl: actions: Add depends on || COMPILE_TEST
I happened to apply the v1 of the patch restriction the
selection to ARM or ARM64, sorry for my sloppiness.
Fixing up the mistake as I can't back the patch out now.
Fixes: 15dbe81ba6ff ("pinctrl: actions: Add the platform dependency to drivers") Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Bjorn Andersson [Tue, 26 Jan 2021 04:26:50 +0000 (20:26 -0800)]
pinctrl: qcom: Add sc8180x TLMM driver
Add pinctrl driver for the sc8180x TLMM block.
A noteworthy difference from previous TLMM blocks is that the registers
for GPIO 177 through 189 are for some reason offset from the typical
layout. Other than that the driver is same old...
Bjorn Andersson [Tue, 26 Jan 2021 04:26:48 +0000 (20:26 -0800)]
dt-bindings: pinctrl: qcom: Define common TLMM binding
Several properties are shared between all TLMM bindings. By providing a
common binding to define these properties each platform's binding can be
reduced to just listing which of these properties should be checked for
- or further specified.
Chanho Park [Wed, 27 Jan 2021 00:16:31 +0000 (09:16 +0900)]
pinctrl: samsung: use raw_spinlock for s3c64xx
Convert spin_[lock|unlock] functions of pin bank to
raw_spinlock to support preempt-rt for pinctrl-s3c64xx. Below patch
converted spinlock_t to raw_spinlock_t but it didn't convert the
s3c64xx's spinlock.
Fixes: c55669e26fb4 ("pinctrl: samsung: use raw_spinlock for locking") Cc: Tomasz Figa <tomasz.figa@gmail.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Link: https://lore.kernel.org/r/20210127001631.91209-1-chanho61.park@samsung.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Linus Walleij [Tue, 26 Jan 2021 14:35:31 +0000 (15:35 +0100)]
Merge tag 'intel-pinctrl-v5.12-1' of gitolite.kernel.org:pub/scm/linux/kernel/git/pinctrl/intel into devel
intel-pinctrl for v5.12-1
* Enable pin control on Intel Alder Lake-P
* Traverse through capabilities, convert them to features for the future use
The following is an automated git shortlog grouped by driver:
intel:
- Convert capability list to features
- Drop unnecessary check for predefined features
- Split intel_pinctrl_add_padgroups() for better maintenance
Drew Fustini [Sat, 23 Jan 2021 20:22:14 +0000 (12:22 -0800)]
pinctrl: pinmux: add function selector to pinmux-functions
Add the function selector to the pinmux-functions debugfs output. This
is an integer which is the index into the pinmux function tree. It will
make it easier to correlate function name to function selector without
having to count the lines in the output.
Example output of "pinmux-functions":
function 0: pinmux-uart0-pins, groups = [ pinmux-uart0-pins ]
function 1: pinmux-uart1-pins, groups = [ pinmux-uart1-pins ]
function 2: pinmux-uart2-pins, groups = [ pinmux-uart2-pins ]
function 3: pinmux-mmc0-pins, groups = [ pinmux-mmc0-pins ]
function 3: pinmux-mmc1-pins, groups = [ pinmux-mmc1-pins ]
function 5: pinmux-i2c0-pins, groups = [ pinmux-i2c0-pins ]
function 6: pinmux-i2c1-pins, groups = [ pinmux-i2c1-pins ]
function 7: pinmux-i2c2-pins, groups = [ pinmux-i2c2-pins ]
function 8: pinmux-pwm0-pins, groups = [ pinmux-pwm0-pins ]
function 9: pinmux-pwm1-pins, groups = [ pinmux-pwm1-pins ]
function 10: pinmux-adc-pins, groups = [ pinmux-adc-pins ]
Cc: Jason Kridner <jkridner@beagleboard.org> Cc: Robert Nelson <robertcnelson@beagleboard.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Tony Lindgren <tony@atomide.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Drew Fustini <drew@beagleboard.org> Link: https://lore.kernel.org/r/20210123202212.528046-1-drew@beagleboard.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Chanho Park [Thu, 21 Jan 2021 03:00:09 +0000 (12:00 +0900)]
pinctrl: samsung: use raw_spinlock for locking
This patch converts spin_[lock|unlock] functions of pin bank to
raw_spinlock to support preempt-rt. This can avoid BUG() assertion when
irqchip callbacks are triggerred. Spinlocks can be converted rt_mutex
which is preemptible when we apply preempt-rt patches.
According to "Documentation/driver-api/gpio/driver.rst",
"Realtime considerations: a realtime compliant GPIO driver should not
use spinlock_t or any sleepable APIs (like PM runtime) as part of its
irqchip implementation.
- spinlock_t should be replaced with raw_spinlock_t.[1]
"
Cc: Tomasz Figa <tomasz.figa@gmail.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20210121030009.25673-1-chanho61.park@samsung.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
pinctrl: actions: Add the platform dependency to drivers
The Actions Semi pinctrl drivers are a mix of both ARM32 and ARM64
platforms. So let's add the correct platform dependency to avoid them
being selected on the other.
Andre Przywara [Mon, 18 Jan 2021 02:08:31 +0000 (02:08 +0000)]
pinctrl: sunxi: Add support for the Allwinner H616 pin controller
Port A is used for an internal connection to some analogue circuitry
which looks like an AC200 IP (as in the H6), though this is not
mentioned in the manual.
Paul Cercueil [Wed, 20 Jan 2021 11:07:22 +0000 (11:07 +0000)]
pinctrl: ingenic: Improve JZ4760 support
- Add otg function and otg-vbus group.
- Add lcd-8bit, lcd-16bit, lcd-18bit, lcd-generic and lcd-special
groups. Change the lcd-24bit group so that it only selects the pins
that aren't in the lcd-18bit and lcd-generic groups (which breaks
Device Tree in theory, but there is none out there for any JZ4760
based board, yet). Remove the lcd-no-pins group which is just useless.
Paul Cercueil [Sun, 13 Dec 2020 23:54:47 +0000 (23:54 +0000)]
pinctrl: ingenic: Only support SoCs enabled in config
Tested on a JZ4740 system (ARCH=mips make qi_lb60_defconfig), this saves
about 14 KiB, by allowing the compiler to garbage-collect all the
functions and tables that correspond to SoCs that were disabled in the
config.
While this works, the foo_suspend() macro is compiled conditionally,
only when CONFIG_FOO_SUSPEND is set. This is problematic, as there could
be a build bug in this function, we wouldn't have a way to know unless
the config option is set.
An alternative is to declare foo_suspend() always, but mark it as maybe
unused:
static int __maybe_unused foo_suspend(struct device *dev)
{
...
}
Again, this works, but the __maybe_unused attribute is required to
instruct the compiler that the function may not be referenced anywhere,
and is safe to remove without making a fuss about it. This makes the
programmer responsible for tagging the functions that can be
garbage-collected.
With this patch, it is now possible to write the following:
static int foo_suspend(struct device *dev)
{
...
}
Ulrich Hecht [Tue, 12 Jan 2021 16:59:08 +0000 (17:59 +0100)]
pinctrl: renesas: Add I/O voltage level flag
This patch adds config macros describing the voltage levels available on
a pin. The current default (3.3V/1.8V) maps to zero to avoid having to
change existing PFC implementations.
Ulrich Hecht [Tue, 12 Jan 2021 16:59:07 +0000 (17:59 +0100)]
pinctrl: renesas: Implement unlock register masks
The V3U SoC has several unlock registers, one per register group. They
reside at offset zero in each 0x200 bytes-sized block.
To avoid adding yet another table to the PFC implementation, this
patch adds the option to specify an address mask instead of the fixed
address in sh_pfc_soc_info::unlock_reg.
pinctrl: renesas: checker: Restrict checks to Renesas platforms
When DEBUG is defined (e.g. if CONFIG_DEBUG_PINCTRL=y), the Renesas pin
control driver runs sanity checks against the pin control tables. This
may cause lots of output on the console, and can be annoying in ARM
multi-platform kernels. Fix this by only running the checks when
running on SuperH, or on a DT platform supported by the Renesas pin
controller driver.
Andy Shevchenko [Thu, 7 Jan 2021 18:54:06 +0000 (20:54 +0200)]
pinctrl: tigerlake: Add Alder Lake-P ACPI ID
Intel Alder Lake-P PCH has the same GPIO hardware than Tiger Lake-LP
PCH but the ACPI ID is different. Add this new ACPI ID to the list of
supported devices.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Andy Shevchenko [Thu, 7 Jan 2021 19:01:57 +0000 (21:01 +0200)]
pinctrl: intel: Split intel_pinctrl_add_padgroups() for better maintenance
Currently the intel_pinctrl_add_padgroups() is twisted a bit due to
a different nature of the pin control hardware implementations. Thus,
its maintenance is a bit hard. Besides that some pieces of code
are run on all hardware and make this code slightly inefficient,
and moreover, validation for one case is done in a wrong time in a flow
which makes it even slower.
Split intel_pinctrl_add_padgroups() to two functions, one per hardware
implementation, for better maintenance and readability.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Samuel Holland [Sun, 3 Jan 2021 10:00:05 +0000 (04:00 -0600)]
pinctrl: sunxi: h6-r: Add s_rsb pin functions
As there is an RSB controller in the H6 SoC, there should be some pin
configuration for it. While no such configuration is documented, the
"s_i2c" pins are suspiciously on the "alternate" function 3, with no
primary function 2 given. This suggests the primary function for these
pins is actually RSB, and that is indeed the case.
Add the "s_rsb" pin functions so the RSB controller can be used.
pinctrl: ralink: rt2880: fix '-Wmissing-prototypes' in init function
Kernel test robot reported the following warning:
'warning: no previous prototype for 'rt2880_pinmux_init''.
This function is the entry point for the platform driver and
it is private to this driver. Hence declare it 'static' which is
the correct thing to do fixing also this warning.
pinctrl: ralink: rt2880: avoid double pointer to simplify code
Double pointer is being used and assigned in a bit dirty way to
assign functions in pinctrl. Instead of doing this just avoid it
and use directly 'p->func' instead.
When this bindings where applied there weren't already
reviewed and some old hacks was being used to properly
pass the schemas checks. This commits fix them up:
- Instead of using 'if-then' clause use '-pins$'.
- 'groups' and 'function' are included inside a new
'^(.*-)?pinmux$' node.
- compatible string is not an 'enum' but a 'const'.
- 'pinctrl-0' and 'pinctrl-names' removed since they are
used in consumer nodes.
Linus Torvalds [Sat, 2 Jan 2021 20:22:46 +0000 (12:22 -0800)]
Merge tag 's390-5.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 cleanups from Vasily Gorbik:
"Update defconfigs and sort config select list"
* tag 's390-5.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/Kconfig: sort config S390 select list once again
s390: update defconfigs
Linus Torvalds [Sat, 2 Jan 2021 19:53:05 +0000 (11:53 -0800)]
Merge tag 'pm-5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a crash in intel_pstate during resume from suspend-to-RAM
that may occur after recent changes and two resource leaks in error
paths in the operating performance points (OPP) framework, add a new
C-states table to intel_idle and update the cpuidle MAINTAINERS entry
to cover the governors too.
Specifics:
- Fix recently introduced crash in the intel_pstate driver that
occurs if scale-invariance is disabled during resume from
suspend-to-RAM due to inconsistent changes of APERF or MPERF MSR
values made by the platform firmware (Rafael Wysocki).
- Fix a memory leak and add a missing clk_put() in error paths in the
OPP framework (Quanyang Wang, Viresh Kumar).
- Add new C-states table for SnowRidge processors to the intel_idle
driver (Artem Bityutskiy).
- Update the MAINTAINERS entry for cpuidle to make it clear that the
governors are covered by it too (Lukas Bulwahn)"
* tag 'pm-5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
intel_idle: add SnowRidge C-state table
cpufreq: intel_pstate: Fix fast-switch fallback path
opp: Call the missing clk_put() on error
opp: fix memory leak in _allocate_opp_table
MAINTAINERS: include governors into CPU IDLE TIME MANAGEMENT FRAMEWORK
Linus Torvalds [Fri, 1 Jan 2021 20:58:07 +0000 (12:58 -0800)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is a load of driver fixes (12 ufs, 1 mpt3sas, 1 cxgbi).
The big core two fixes are for power management ("block: Do not accept
any requests while suspended" and "block: Fix a race in the runtime
power management code") which finally sorts out the resume problems
we've occasionally been having.
To make the resume fix, there are seven necessary precursors which
effectively renames REQ_PREEMPT to REQ_PM, so every "special" request
in block is automatically a power management exempt one.
All of the non-PM preempt cases are removed except for the one in the
SCSI Parallel Interface (spi) domain validation which is a genuine
case where we have to run requests at high priority to validate the
bus so this becomes an autopm get/put protected request"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (22 commits)
scsi: cxgb4i: Fix TLS dependency
scsi: ufs: Un-inline ufshcd_vops_device_reset function
scsi: ufs: Re-enable WriteBooster after device reset
scsi: ufs-mediatek: Use correct path to fix compile error
scsi: mpt3sas: Signedness bug in _base_get_diag_triggers()
scsi: block: Do not accept any requests while suspended
scsi: block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT
scsi: core: Only process PM requests if rpm_status != RPM_ACTIVE
scsi: scsi_transport_spi: Set RQF_PM for domain validation commands
scsi: ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT
scsi: ide: Do not set the RQF_PREEMPT flag for sense requests
scsi: block: Introduce BLK_MQ_REQ_PM
scsi: block: Fix a race in the runtime power management code
scsi: ufs-pci: Enable UFSHCD_CAP_RPM_AUTOSUSPEND for Intel controllers
scsi: ufs-pci: Fix recovery from hibernate exit errors for Intel controllers
scsi: ufs-pci: Ensure UFS device is in PowerDown mode for suspend-to-disk ->poweroff()
scsi: ufs-pci: Fix restore from S4 for Intel controllers
scsi: ufs-mediatek: Keep VCC always-on for specific devices
scsi: ufs: Allow regulators being always-on
scsi: ufs: Clear UAC for RPMB after ufshcd resets
...
Linus Torvalds [Fri, 1 Jan 2021 20:49:09 +0000 (12:49 -0800)]
Merge tag 'block-5.11-2021-01-01' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Two minor block fixes from this last week that should go into 5.11:
- Add missing NOWAIT debugfs definition (Andres)
- Fix kerneldoc warning introduced this merge window (Randy)"
* tag 'block-5.11-2021-01-01' of git://git.kernel.dk/linux-block:
block: add debugfs stanza for QUEUE_FLAG_NOWAIT
fs: block_dev.c: fix kernel-doc warnings from struct block_device changes
Linus Torvalds [Fri, 1 Jan 2021 20:29:49 +0000 (12:29 -0800)]
Merge tag 'io_uring-5.11-2021-01-01' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"A few fixes that should go into 5.11, all marked for stable as well:
- Fix issue around identity COW'ing and users that share a ring
across processes
- Fix a hang associated with unregistering fixed files (Pavel)
- Move the 'process is exiting' cancelation a bit earlier, so
task_works aren't affected by it (Pavel)"
* tag 'io_uring-5.11-2021-01-01' of git://git.kernel.dk/linux-block:
kernel/io_uring: cancel io_uring before task works
io_uring: fix io_sqe_files_unregister() hangs
io_uring: add a helper for setting a ref node
io_uring: don't assume mm is constant across submits
Linus Torvalds [Mon, 28 Dec 2020 19:40:22 +0000 (11:40 -0800)]
depmod: handle the case of /sbin/depmod without /sbin in PATH
Commit 15b4559fd438 ("kbuild: don't hardcode depmod path") stopped
hard-coding the path of depmod, but in the process caused trouble for
distributions that had that /sbin location, but didn't have it in the
PATH (generally because /sbin is limited to the super-user path).
Work around it for now by just adding /sbin to the end of PATH in the
depmod.sh script.
Pavel Begunkov [Wed, 30 Dec 2020 21:34:16 +0000 (21:34 +0000)]
kernel/io_uring: cancel io_uring before task works
For cancelling io_uring requests it needs either to be able to run
currently enqueued task_works or having it shut down by that moment.
Otherwise io_uring_cancel_files() may be waiting for requests that won't
ever complete.
Go with the first way and do cancellations before setting PF_EXITING and
so before putting the task_work infrastructure into a transition state
where task_work_run() would better not be called.
Pavel Begunkov [Wed, 30 Dec 2020 21:34:15 +0000 (21:34 +0000)]
io_uring: fix io_sqe_files_unregister() hangs
io_sqe_files_unregister() uninterruptibly waits for enqueued ref nodes,
however requests keeping them may never complete, e.g. because of some
userspace dependency. Make sure it's interruptible otherwise it would
hang forever.
Linus Torvalds [Wed, 30 Dec 2020 20:02:12 +0000 (12:02 -0800)]
Merge tag 'ceph-for-5.11-rc2' of git://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"A fix for an edge case in MClientRequest encoding and a couple of
trivial fixups for the new msgr2 support"
* tag 'ceph-for-5.11-rc2' of git://github.com/ceph/ceph-client:
libceph: add __maybe_unused to DEFINE_MSGR2_FEATURE
libceph: align session_key and con_secret to 16 bytes
libceph: fix auth_signature buffer allocation in secure mode
ceph: reencode gid_list when reconnecting
Artem Bityutskiy [Sun, 27 Dec 2020 10:11:16 +0000 (12:11 +0200)]
intel_idle: add SnowRidge C-state table
Add C-state table for the SnowRidge SoC which is found on Intel Jacobsville
platforms.
The following has been changed.
1. C1E latency changed from 10us to 15us. It was measured using the
open source "wult" tool (the "nic" method, 15us is the 99.99th
percentile).
2. C1E power break even changed from 20us to 25us, which may result
in less C1E residency in some workloads.
3. C6 latency changed from 50us to 130us. Measured the same way as C1E.
The C6 C-state is supported only by some SnowRidge revisions, so add a C-state
table commentary about this.
On SnowRidge, C6 support is enumerated via the usual mechanism: "mwait" leaf of
the "cpuid" instruction. The 'intel_idle' driver does check this leaf, so even
though C6 is present in the table, the driver will only use it if the CPU does
support it.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
When sugov_update_single_perf() falls back to the "frequency"
path due to the missing scale-invariance, it will call
cpufreq_driver_fast_switch() via sugov_fast_switch()
and the driver's ->fast_switch() callback will be invoked,
so it must not be NULL.
However, after commit 5526a46f2408 ("cpufreq: intel_pstate: Implement
the ->adjust_perf() callback") intel_pstate sets ->fast_switch() to
NULL when it is going to use intel_cpufreq_adjust_perf(), which is a
mistake, because on x86 the scale-invariance may be turned off
dynamically, so modify it to retain the original ->adjust_perf()
callback pointer.
Fixes: 5526a46f2408 ("cpufreq: intel_pstate: Implement the ->adjust_perf() callback") Reported-by: Kenneth R. Crudup <kenny@panix.com> Tested-by: Kenneth R. Crudup <kenny@panix.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Merge branch 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull operating performance points (OPP) framework fixes for 5.11-rc2
from Viresh Kumar:
"This contains two patches to fix freeing of resources in error paths."
* 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
opp: Call the missing clk_put() on error
opp: fix memory leak in _allocate_opp_table
Randy Dunlap [Tue, 29 Dec 2020 03:47:06 +0000 (19:47 -0800)]
fs: block_dev.c: fix kernel-doc warnings from struct block_device changes
Fix new kernel-doc warnings in fs/block_dev.c:
../fs/block_dev.c:1066: warning: Excess function parameter 'whole' description in 'bd_abort_claiming'
../fs/block_dev.c:1837: warning: Function parameter or member 'dev' not described in 'lookup_bdev'
Fixes: f37515f398fb ("block: remove i_bdev") Fixes: 4e6f4f228cb1 ("block: simplify the block device claiming interface") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Hellwig <hch@lst.de> Cc: linux-fsdevel@vger.kernel.org Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Linus Torvalds [Tue, 29 Dec 2020 23:45:49 +0000 (15:45 -0800)]
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
"16 patches
Subsystems affected by this patch series: mm (selftests, hugetlb,
pagecache, mremap, kasan, and slub), kbuild, checkpatch, misc, and
lib"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm: slub: call account_slab_page() after slab page initialization
zlib: move EXPORT_SYMBOL() and MODULE_LICENSE() out of dfltcc_syms.c
lib/zlib: fix inflating zlib streams on s390
lib/genalloc: fix the overflow when size is too big
kdev_t: always inline major/minor helper functions
sizes.h: add SZ_8G/SZ_16G/SZ_32G macros
local64.h: make <asm/local64.h> mandatory
kasan: fix null pointer dereference in kasan_record_aux_stack
mm: generalise COW SMC TLB flushing race comment
mm/mremap.c: fix extent calculation
mm: memmap defer init doesn't work as expected
mm: add prototype for __add_to_page_cache_locked()
checkpatch: prefer strscpy to strlcpy
Revert "kbuild: avoid static_assert for genksyms"
mm/hugetlb: fix deadlock in hugetlb_cow error path
selftests/vm: fix building protection keys test
Roman Gushchin [Tue, 29 Dec 2020 23:15:07 +0000 (15:15 -0800)]
mm: slub: call account_slab_page() after slab page initialization
It's convenient to have page->objects initialized before calling into
account_slab_page(). In particular, this information can be used to
pre-alloc the obj_cgroup vector.
Let's call account_slab_page() a bit later, after the initialization of
page->objects.
This commit doesn't bring any functional change, but is required for
further optimizations.
[akpm@linux-foundation.org: undo changes needed by forthcoming mm-memcg-slab-pre-allocate-obj_cgroups-for-slab-caches-with-slab_account.patch]
Link: https://lkml.kernel.org/r/20201110195753.530157-1-guro@fb.com Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Shakeel Butt <shakeelb@google.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Randy Dunlap [Tue, 29 Dec 2020 23:15:04 +0000 (15:15 -0800)]
zlib: move EXPORT_SYMBOL() and MODULE_LICENSE() out of dfltcc_syms.c
In commit 2e750fb97008 ("zlib: export S390 symbols for zlib modules"), I
added EXPORT_SYMBOL()s to dfltcc_inflate.c but then Mikhail said that
these should probably be in dfltcc_syms.c with the other
EXPORT_SYMBOL()s.
However, that is contrary to the current kernel style, which places
EXPORT_SYMBOL() immediately after the function that it applies to, so
move all EXPORT_SYMBOL()s to their respective function locations and
drop the dfltcc_syms.c file. Also move MODULE_LICENSE() from the
deleted file to dfltcc.c.
Ilya Leoshkevich [Tue, 29 Dec 2020 23:15:01 +0000 (15:15 -0800)]
lib/zlib: fix inflating zlib streams on s390
Decompressing zlib streams on s390 fails with "incorrect data check"
error.
Userspace zlib checks inflate_state.flags in order to byteswap checksums
only for zlib streams, and s390 hardware inflate code, which was ported
from there, tries to match this behavior. At the same time, kernel zlib
does not use inflate_state.flags, so it contains essentially random
values. For many use cases either zlib stream is zeroed out or checksum
is not used, so this problem is masked, but at least SquashFS is still
affected.
Fix by always passing a checksum to and from the hardware as is, which
matches zlib_inflate()'s expectations.
Randy Dunlap [Tue, 29 Dec 2020 23:14:49 +0000 (15:14 -0800)]
local64.h: make <asm/local64.h> mandatory
Make <asm-generic/local64.h> mandatory in include/asm-generic/Kbuild and
remove all arch/*/include/asm/local64.h arch-specific files since they
only #include <asm-generic/local64.h>.
This fixes build errors on arch/c6x/ and arch/nios2/ for
block/blk-iocost.c.
Build-tested on 21 of 25 arch-es. (tools problems on the others)
Yes, we could even rename <asm-generic/local64.h> to
<linux/local64.h> and change all #includes to use
<linux/local64.h> instead.
Link: https://lkml.kernel.org/r/20201227024446.17018-1-rdunlap@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Suggested-by: Christoph Hellwig <hch@infradead.org> Reviewed-by: Masahiro Yamada <masahiroy@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Nicholas Piggin [Tue, 29 Dec 2020 23:14:43 +0000 (15:14 -0800)]
mm: generalise COW SMC TLB flushing race comment
I'm not sure if I'm completely missing something here, but AFAIKS the
reference to the mysterious "COW SMC race" confuses the issue. The
original changelog and mailing list thread didn't help me either.
This SMC race is where the problem was detected, but isn't the general
problem bigger and more obvious: that the new PTE could be picked up at
any time by any TLB while entries for the old PTE exist in other TLBs
before the TLB flush takes effect?
The case where the iTLB and dTLB of a CPU are pointing at different pages
is an interesting one but follows from the general problem.
The other (minor) thing with the comment I think it makes it a bit clearer
to say what the old code was doing (i.e., it avoids the race as opposed to
what?).
References: fa5250c0f1f4d ("mm: fix a race condition under SMC + COW") Link: https://lkml.kernel.org/r/20201215121119.351650-1-npiggin@gmail.com Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Hugh Dickins <hughd@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suresh Siddha <sbsiddha@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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