Commit Graph

1014071 Commits

Author SHA1 Message Date
Olof Johansson
57d459e219 Merge tag 'imx-soc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/soc
i.MX SoC changes for 5.14:

- Add SMP support for i.MX7D, as there are i.MX7D devices running in
  field with U-Boot that doesn't support PSCI.
- Fix imx5_cpu_suspend_info reference in i.MX5 PM code comments.
- Add SoC ID initialization for i.MX50.
- Drop unnecessary of_platform_default_populate() call from i.MX6Q
  .init_machine hook.
- A series from Oleksij Rempel to remove most of the i.MX6/7 board
  specific PHY fixups.

* tag 'imx-soc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: imx: add smp support for imx7d
  ARM: imx6q: drop of_platform_default_populate() from init_machine
  ARM: imx7d: remove Atheros AR8031 PHY fixup
  ARM: imx6sx: remove Atheros AR8031 PHY fixup
  ARM: imx6q: remove Atheros AR8035 SmartEEE fixup
  ARM: imx6q: remove clk-out fixup for the Atheros AR8031 and AR8035 PHYs
  ARM: imx6q: remove BMCR_PDOWN handler in ar8035_phy_fixup()
  ARM: imx6q: remove part of ar8031_phy_fixup()
  ARM: imx6q: remove PHY fixup for KSZ9031
  ARM: imx: Initialize SoC ID on i.MX50
  ARM: imx: pm-imx5: Fix references to imx5_cpu_suspend_info

Link: https://lore.kernel.org/r/20210613082544.16067-2-shawnguo@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
2021-06-15 08:09:52 -07:00
Olof Johansson
2f80e8b45c Merge tag 'sunxi-core-for-5.14-1' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into arm/soc
One patch to select one of our timer in the arm64 Kconfig option.

* tag 'sunxi-core-for-5.14-1' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
  arm64: sunxi: Build the sun4i timer driver

Link: https://lore.kernel.org/r/bf3431f6-2196-425c-9b43-0bf4de0b6d30.lettre@localhost
Signed-off-by: Olof Johansson <olof@lixom.net>
2021-06-12 08:54:03 -07:00
Olof Johansson
05a3a76766 Merge tag 'samsung-soc-5.14' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/soc
Samsung mach/soc changes for v5.14

1. Fix: add missing of_node_put.
2. Extend Samsung maintainers entry to cover Samsung PWM driver files,
   because they do not have a dedicated entry.
3. Minor cleanups.

* tag 'samsung-soc-5.14' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  MAINTAINERS: Include Samsung PWM in Samsung SoC entry
  soc: samsung: pmu: drop EXYNOS_CENTRAL_SEQ_OPTION defines
  ARM: exynos: add missing of_node_put for loop iteration
  ARM: s3c: Remove unnecessary break in RX1950

Link: https://lore.kernel.org/r/20210610074055.12474-2-krzysztof.kozlowski@canonical.com
Signed-off-by: Olof Johansson <olof@lixom.net>
2021-06-12 08:39:08 -07:00
Olof Johansson
8639a12370 Merge tag 'omap-for-v5.14/cleanup-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/soc
Clean up changes for omaps for v5.14 merge window

With the recent changes to drop legacy platform data for
am3/4, omap4/5, and dra7, we can drop the related unused
code. There is also a patch to remove leading spaces from
the Kconfig file.

* tag 'omap-for-v5.14/cleanup-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: remove omap2_set_globals_control()
  ARM: OMAP2+: CM: remove omap2_set_globals_cm()
  ARM: OMAP1: Remove leading spaces in Kconfig
  MAINTAINERS: remove obsolete OMAP HWMOD DATA FOR OMAP4-BASED DEVICES

Link: https://lore.kernel.org/r/pull-1622618286-677305@atomide.com
Signed-off-by: Olof Johansson <olof@lixom.net>
2021-06-12 08:32:36 -07:00
Anson Huang
e34645f458 ARM: imx: add smp support for imx7d
Add SMP support for i.MX7D, including CPU hotplug support, for
systems where TFA is not present.

The motivation for bringing up the second i.MX7D core inside the kernel
is that legacy vendor bootloaders usually do not implement PSCI support.

This is a significant blocker for systems in the field that are running old
bootloader versions to upgrade to a modern mainline kernel version, as only
one CPU of the i.MX7D would be brought up.

Bring up the second i.MX7D core inside the kernel to make the migration
path to mainline kernel easier for the existing iMX7D users.

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Arulpandiyan Vadivel <arulpandiyan_vadivel@mentor.com> # Fix merge conflicts
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Marek Vasut <marex@denx.de> # heavy cleanup
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-06-12 12:02:57 +08:00
Marco Felsch
cc8870bf4c ARM: imx6q: drop of_platform_default_populate() from init_machine
Dropping the machine_init specific of_platform_default_populate() can be
done safely due to the following two facts:

1)
Since commit 44a7185c2a ("of/platform: Add common method to populate
default bus") we have a common method to populate the devices.

2)
The machine_init code don't need bounded devices<>drivers since the code
uses syscon_regmap_lookup_by_compatible() which register a syscon
device on demand.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-06-12 11:54:40 +08:00
Krzysztof Kozlowski
a6419e53c7 MAINTAINERS: Include Samsung PWM in Samsung SoC entry
The Samsung PWM and PWM-based timer/clocksource drivers lacked dedicated
maintainers entry.  They are used on all Samsung SoC designs (although
timer/clocksource driver only on older platforms), so include them in
Samsung SoC entry maintained by Krzysztof Kozlowski.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210506202729.157260-5-krzysztof.kozlowski@canonical.com
2021-05-27 11:59:48 -04:00
Krzysztof Kozlowski
16b79a1e08 soc: samsung: pmu: drop EXYNOS_CENTRAL_SEQ_OPTION defines
The defines for Exynos5 CENTRAL_SEQ_OPTION (e.g.
EXYNOS5_USE_STANDBYWFI_ARM_CORE1) are not used.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20210525184716.119663-1-krzysztof.kozlowski@canonical.com
2021-05-27 11:57:34 -04:00
Linus Torvalds
c4681547bc Linux 5.13-rc3 2021-05-23 11:42:48 -10:00
Linus Torvalds
6ebb6814a1 Merge tag 'perf-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
 "Two perf fixes:

   - Do not check the LBR_TOS MSR when setting up unrelated LBR MSRs as
     this can cause malfunction when TOS is not supported

   - Allocate the LBR XSAVE buffers along with the DS buffers upfront
     because allocating them when adding an event can deadlock"

* tag 'perf-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/lbr: Remove cpuc->lbr_xsave allocation from atomic context
  perf/x86: Avoid touching LBR_TOS MSR for Arch LBR
2021-05-23 06:32:40 -10:00
Linus Torvalds
0898678c74 Merge tag 'locking-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
 "Two locking fixes:

   - Invoke the lockdep tracepoints in the correct place so the ordering
     is correct again

   - Don't leave the mutex WAITER bit stale when the last waiter is
     dropping out early due to a signal as that forces all subsequent
     lock operations needlessly into the slowpath until it's cleaned up
     again"

* tag 'locking-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal
  locking/lockdep: Correct calling tracepoints
2021-05-23 06:30:08 -10:00
Linus Torvalds
f73d2a4293 Merge tag 'irq-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
 "A few fixes for irqchip drivers:

   - Allocate interrupt descriptors correctly on Mainstone PXA when
     SPARSE_IRQ is enabled; otherwise the interrupt association fails

   - Make the APPLE AIC chip driver depend on APPLE

   - Remove redundant error output on devm_ioremap_resource() failure"

* tag 'irq-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip: Remove redundant error printing
  irqchip/apple-aic: APPLE_AIC should depend on ARCH_APPLE
  ARM: PXA: Fix cplds irqdesc allocation when using legacy mode
2021-05-23 06:28:20 -10:00
Linus Torvalds
7de7ac8d60 Merge tag 'x86_urgent_for_v5.13_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:

 - Fix how SEV handles MMIO accesses by forwarding potential page faults
   instead of killing the machine and by using the accessors with the
   exact functionality needed when accessing memory.

 - Fix a confusion with Clang LTO compiler switches passed to the it

 - Handle the case gracefully when VMGEXIT has been executed in
   userspace

* tag 'x86_urgent_for_v5.13_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sev-es: Use __put_user()/__get_user() for data accesses
  x86/sev-es: Forward page-faults which happen during emulation
  x86/sev-es: Don't return NULL from sev_es_get_ghcb()
  x86/build: Fix location of '-plugin-opt=' flags
  x86/sev-es: Invalidate the GHCB after completing VMGEXIT
  x86/sev-es: Move sev_es_put_ghcb() in prep for follow on patch
2021-05-23 06:12:25 -10:00
Linus Torvalds
28ceac6959 Merge tag 'powerpc-5.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:

 - Fix breakage of strace (and other ptracers etc.) when using the new
   scv ABI (Power9 or later with glibc >= 2.33).

 - Fix early_ioremap() on 64-bit, which broke booting on some machines.

Thanks to Dmitry V. Levin, Nicholas Piggin, Alexey Kardashevskiy, and
Christophe Leroy.

* tag 'powerpc-5.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s/syscall: Fix ptrace syscall info with scv syscalls
  powerpc/64s/syscall: Use pt_regs.trap to distinguish syscall ABI difference between sc and scv syscalls
  powerpc: Fix early setup to make early_ioremap() work
2021-05-23 06:07:33 -10:00
Linus Torvalds
4d7620341e Merge tag 'kbuild-fixes-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:

 - Fix short log indentation for tools builds

 - Fix dummy-tools to adjust to the latest stackprotector check

* tag 'kbuild-fixes-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: dummy-tools: adjust to stricter stackprotector check
  scripts/jobserver-exec: Fix a typo ("envirnoment")
  tools build: Fix quiet cmd indentation
2021-05-22 19:53:56 -10:00
Oleksij Rempel
7a4e95d689 ARM: imx7d: remove Atheros AR8031 PHY fixup
This fixup configures the IO voltage and disables the SmartEEE
functionality.

If this patch breaks your system, enable AT803X_PHY driver and configure
the PHY by the device tree:

	phy-connection-type = "rgmii-id";
	ethernet-phy@X {
		reg = <0xX>;

		qca,smarteee-tw-us-1g = <24>;

		vddio-supply = <&vddh>;

		vddio: vddio-regulator {
			regulator-name = "VDDIO";
			regulator-min-microvolt = <1800000>;
			regulator-max-microvolt = <1800000>;
		};

		vddh: vddh-regulator {
			regulator-name = "VDDH";
		};
	};

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-05-23 11:32:46 +08:00
Oleksij Rempel
d500c6c42b ARM: imx6sx: remove Atheros AR8031 PHY fixup
If this patch breaks your system, enable AT803X_PHY driver and add a PHY
node to the board device tree:

	phy-connection-type = "rgmii-txid"; (or rgmii-id)
	ethernet-phy@X {
		reg = <0xX>;

		qca,clk-out-frequency = <125000000>;

		vddio-supply = <&vddh>;

		vddio: vddio-regulator {
			regulator-name = "VDDIO";
			regulator-min-microvolt = <1800000>;
			regulator-max-microvolt = <1800000>;
		};

		vddh: vddh-regulator {
			regulator-name = "VDDH";
		};
	};

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-05-23 11:32:46 +08:00
Oleksij Rempel
5823683779 ARM: imx6q: remove Atheros AR8035 SmartEEE fixup
This fixup removes the Lpi_en bit.

If this patch breaks functionality of your board, use following device
tree properties: qca,smarteee-tw-us-1g and qca,smarteee-tw-us-100m.

For example:

	ethernet-phy@X {
		reg = <0xX>;
		qca,smarteee-tw-us-1g = <24>;
		....
	};

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-05-23 11:32:46 +08:00
Oleksij Rempel
f5d9aa79df ARM: imx6q: remove clk-out fixup for the Atheros AR8031 and AR8035 PHYs
This configuration should be set over device tree.

If this patch breaks network functionality on your system, enable the
AT803X_PHY driver and set following device tree property in the PHY
node:

    qca,clk-out-frequency = <125000000>;

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-05-23 11:32:46 +08:00
Oleksij Rempel
4d3b70d980 ARM: imx6q: remove BMCR_PDOWN handler in ar8035_phy_fixup()
BMCR_PDOWN is removed by resume handler at803x_resume() in
drivers/net/phy/at803x.c

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-05-23 11:32:46 +08:00
Oleksij Rempel
5fff104f04 ARM: imx6q: remove part of ar8031_phy_fixup()
This part of this fixup is overwritten by at803x_config_init() in
drivers/net/phy/at803x.c. No additional devicetree fixes are needed.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-05-23 11:32:46 +08:00
Oleksij Rempel
66e69d8849 ARM: imx6q: remove PHY fixup for KSZ9031
Starting with:

    bcf3440c6d ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")

the micrel phy driver started respecting phy-mode for the KSZ9031 PHY.
At least with kernel v5.8 configuration provided by this fixup was
overwritten by the micrel driver.

This fixup was providing following configuration:

RX path: 2.58ns delay
    rx -0.42 (left shift) + rx_clk  +0.96ns (right shift) =
        1,38 + 1,2 internal RX delay = 2.58ns
TX path: 0.96ns delay
    tx (no delay) + tx_clk 0.96ns (right shift) = 0.96ns

This configuration is outside of the recommended RGMII clock skew delays
and about in the middle of: rgmii-idrx and rgmii-id

Since most embedded systems do not have enough place to introduce
significant clock skew, rgmii-id is the way to go.

In case this patch breaks network functionality on your system, build
kernel with enabled MICREL_PHY. If it is still not working then try
following device tree options:
1. Set (or change) phy-mode in DT to:
   phy-mode = "rgmii-id";
   This actives internal delay for both RX and TX.
1. Set (or change) phy-mode in DT to:
   phy-mode = "rgmii-idrx";
   This actives internal delay for RX only.
3. Use following DT properties:
   phy-mode = "rgmii";
   txen-skew-psec = <0>;
   rxdv-skew-psec = <0>;
   rxd0-skew-psec = <0>;
   rxd1-skew-psec = <0>;
   rxd2-skew-psec = <0>;
   rxd3-skew-psec = <0>;
   rxc-skew-psec = <1860>;
   txc-skew-psec = <1860>;
   This activates the internal delays for RX and TX, with the value as
   the fixup that is removed in this patch.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2021-05-23 11:32:46 +08:00
Linus Torvalds
34c5c89890 Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "10 patches.

  Subsystems affected by this patch series: mm (pagealloc, gup, kasan,
  and userfaultfd), ipc, selftests, watchdog, bitmap, procfs, and lib"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  userfaultfd: hugetlbfs: fix new flag usage in error path
  lib: kunit: suppress a compilation warning of frame size
  proc: remove Alexey from MAINTAINERS
  linux/bits.h: fix compilation error with GENMASK
  watchdog: reliable handling of timestamps
  kasan: slab: always reset the tag in get_freepointer_safe()
  tools/testing/selftests/exec: fix link error
  ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
  Revert "mm/gup: check page posion status for coredump."
  mm/shuffle: fix section mismatch warning
2021-05-22 15:20:20 -10:00
Mike Kravetz
e32905e573 userfaultfd: hugetlbfs: fix new flag usage in error path
In commit d6995da311 ("hugetlb: use page.private for hugetlb specific
page flags") the use of PagePrivate to indicate a reservation count
should be restored at free time was changed to the hugetlb specific flag
HPageRestoreReserve.  Changes to a userfaultfd error path as well as a
VM_BUG_ON() in remove_inode_hugepages() were overlooked.

Users could see incorrect hugetlb reserve counts if they experience an
error with a UFFDIO_COPY operation.  Specifically, this would be the
result of an unlikely copy_huge_page_from_user error.  There is not an
increased chance of hitting the VM_BUG_ON.

Link: https://lkml.kernel.org/r/20210521233952.236434-1-mike.kravetz@oracle.com
Fixes: d6995da311 ("hugetlb: use page.private for hugetlb specific page flags")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Mina Almasry <almasry.mina@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Zhen Lei
1b6d63938a lib: kunit: suppress a compilation warning of frame size
lib/bitfield_kunit.c: In function `test_bitfields_constants':
lib/bitfield_kunit.c:93:1: warning: the frame size of 7456 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^

As the description of BITFIELD_KUNIT in lib/Kconfig.debug, it "Only useful
for kernel devs running the KUnit test harness, and not intended for
inclusion into a production build".  Therefore, it is not worth modifying
variable 'test_bitfields_constants' to clear this warning.  Just suppress
it.

Link: https://lkml.kernel.org/r/20210518094533.7652-1-thunder.leizhen@huawei.com
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Vitor Massaru Iha <vitor@massaru.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Alexey Dobriyan
43b2ec977c proc: remove Alexey from MAINTAINERS
People Cc me and I don't have time.

Link: https://lkml.kernel.org/r/YKarMxHJBIhMHQIh@localhost.localdomain
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Rikard Falkeborn
f747e6667e linux/bits.h: fix compilation error with GENMASK
GENMASK() has an input check which uses __builtin_choose_expr() to
enable a compile time sanity check of its inputs if they are known at
compile time.

However, it turns out that __builtin_constant_p() does not always return
a compile time constant [0].  It was thought this problem was fixed with
gcc 4.9 [1], but apparently this is not the case [2].

Switch to use __is_constexpr() instead which always returns a compile time
constant, regardless of its inputs.

Link: https://lore.kernel.org/lkml/42b4342b-aefc-a16a-0d43-9f9c0d63ba7a@rasmusvillemoes.dk [0]
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19449 [1]
Link: https://lore.kernel.org/lkml/1ac7bbc2-45d9-26ed-0b33-bf382b8d858b@I-love.SAKURA.ne.jp [2]
Link: https://lkml.kernel.org/r/20210511203716.117010-1-rikard.falkeborn@gmail.com
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Petr Mladek
0f90b88dbc watchdog: reliable handling of timestamps
Commit 9bf3bc949f ("watchdog: cleanup handling of false positives")
tried to handle a virtual host stopped by the host a more
straightforward and cleaner way.

But it introduced a risk of false softlockup reports.  The virtual host
might be stopped at any time, for example between
kvm_check_and_clear_guest_paused() and is_softlockup().  As a result,
is_softlockup() might read the updated jiffies and detects a softlockup.

A solution might be to put back kvm_check_and_clear_guest_paused() after
is_softlockup() and detect it.  But it would put back the cycle that
complicates the logic.

In fact, the handling of all the timestamps is not reliable.  The code
does not guarantee when and how many times the timestamps are read.  For
example, "period_ts" might be touched anytime also from NMI and re-read in
is_softlockup().  It works just by chance.

Fix all the problems by making the code even more explicit.

1. Make sure that "now" and "period_ts" timestamps are read only once.
   They might be changed at anytime by NMI or when the virtual guest is
   stopped by the host.  Note that "now" timestamp does this implicitly
   because "jiffies" is marked volatile.

2. "now" time must be read first.  The state of "period_ts" will
   decide whether it will be used or the period will get restarted.

3. kvm_check_and_clear_guest_paused() must be called before reading
   "period_ts".  It touches the variable when the guest was stopped.

As a result, "now" timestamp is used only when the watchdog was not
touched and the guest not stopped in the meantime.  "period_ts" is
restarted in all other situations.

Link: https://lkml.kernel.org/r/YKT55gw+RZfyoFf7@alley
Fixes: 9bf3bc949f ("watchdog: cleanup handling of false positives")
Signed-off-by: Petr Mladek <pmladek@suse.com>
Reported-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Alexander Potapenko
f70b00496f kasan: slab: always reset the tag in get_freepointer_safe()
With CONFIG_DEBUG_PAGEALLOC enabled, the kernel should also untag the
object pointer, as done in get_freepointer().

Failing to do so reportedly leads to SLUB freelist corruptions that
manifest as boot-time crashes.

Link: https://lkml.kernel.org/r/20210514072228.534418-1-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Elliot Berman <eberman@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Yang Yingliang
4d1cd3b2c5 tools/testing/selftests/exec: fix link error
Fix the link error by adding '-static':

  gcc -Wall  -Wl,-z,max-page-size=0x1000 -pie load_address.c -o /home/yang/linux/tools/testing/selftests/exec/load_address_4096
  /usr/bin/ld: /tmp/ccopEGun.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `stderr@@GLIBC_2.17' which may bind externally can not be used when making a shared object; recompile with -fPIC
  /usr/bin/ld: /tmp/ccopEGun.o(.text+0x158): unresolvable R_AARCH64_ADR_PREL_PG_HI21 relocation against symbol `stderr@@GLIBC_2.17'
  /usr/bin/ld: final link failed: bad value
  collect2: error: ld returned 1 exit status
  make: *** [Makefile:25: tools/testing/selftests/exec/load_address_4096] Error 1

Link: https://lkml.kernel.org/r/20210514092422.2367367-1-yangyingliang@huawei.com
Fixes: 206e22f019 ("tools/testing/selftests: add self-test for verifying load alignment")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: Chris Kennelly <ckennelly@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Varad Gautam
a11ddb37bf ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
do_mq_timedreceive calls wq_sleep with a stack local address.  The
sender (do_mq_timedsend) uses this address to later call pipelined_send.

This leads to a very hard to trigger race where a do_mq_timedreceive
call might return and leave do_mq_timedsend to rely on an invalid
address, causing the following crash:

  RIP: 0010:wake_q_add_safe+0x13/0x60
  Call Trace:
   __x64_sys_mq_timedsend+0x2a9/0x490
   do_syscall_64+0x80/0x680
   entry_SYSCALL_64_after_hwframe+0x44/0xa9
  RIP: 0033:0x7f5928e40343

The race occurs as:

1. do_mq_timedreceive calls wq_sleep with the address of `struct
   ext_wait_queue` on function stack (aliased as `ewq_addr` here) - it
   holds a valid `struct ext_wait_queue *` as long as the stack has not
   been overwritten.

2. `ewq_addr` gets added to info->e_wait_q[RECV].list in wq_add, and
   do_mq_timedsend receives it via wq_get_first_waiter(info, RECV) to call
   __pipelined_op.

3. Sender calls __pipelined_op::smp_store_release(&this->state,
   STATE_READY).  Here is where the race window begins.  (`this` is
   `ewq_addr`.)

4. If the receiver wakes up now in do_mq_timedreceive::wq_sleep, it
   will see `state == STATE_READY` and break.

5. do_mq_timedreceive returns, and `ewq_addr` is no longer guaranteed
   to be a `struct ext_wait_queue *` since it was on do_mq_timedreceive's
   stack.  (Although the address may not get overwritten until another
   function happens to touch it, which means it can persist around for an
   indefinite time.)

6. do_mq_timedsend::__pipelined_op() still believes `ewq_addr` is a
   `struct ext_wait_queue *`, and uses it to find a task_struct to pass to
   the wake_q_add_safe call.  In the lucky case where nothing has
   overwritten `ewq_addr` yet, `ewq_addr->task` is the right task_struct.
   In the unlucky case, __pipelined_op::wake_q_add_safe gets handed a
   bogus address as the receiver's task_struct causing the crash.

do_mq_timedsend::__pipelined_op() should not dereference `this` after
setting STATE_READY, as the receiver counterpart is now free to return.
Change __pipelined_op to call wake_q_add_safe on the receiver's
task_struct returned by get_task_struct, instead of dereferencing `this`
which sits on the receiver's stack.

As Manfred pointed out, the race potentially also exists in
ipc/msg.c::expunge_all and ipc/sem.c::wake_up_sem_queue_prepare.  Fix
those in the same way.

Link: https://lkml.kernel.org/r/20210510102950.12551-1-varad.gautam@suse.com
Fixes: c5b2cbdbda ("ipc/mqueue.c: update/document memory barriers")
Fixes: 8116b54e7e ("ipc/sem.c: document and update memory barriers")
Fixes: 0d97a82ba8 ("ipc/msg.c: update and document memory barriers")
Signed-off-by: Varad Gautam <varad.gautam@suse.com>
Reported-by: Matthias von Faber <matthias.vonfaber@aox-tech.de>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Michal Hocko
f10628d2f6 Revert "mm/gup: check page posion status for coredump."
While reviewing [1] I came across commit d3378e86d1 ("mm/gup: check
page posion status for coredump.") and noticed that this patch is broken
in two ways.  First it doesn't really prevent hwpoison pages from being
dumped because hwpoison pages can be marked asynchornously at any time
after the check.  Secondly, and more importantly, the patch introduces a
ref count leak because get_dump_page takes a reference on the page which
is not released.

It also seems that the patch was merged incorrectly because there were
follow up changes not included as well as discussions on how to address
the underlying problem [2]

Therefore revert the original patch.

Link: http://lkml.kernel.org/r/20210429122519.15183-4-david@redhat.com [1]
Link: http://lkml.kernel.org/r/57ac524c-b49a-99ec-c1e4-ef5027bfb61b@redhat.com [2]
Link: https://lkml.kernel.org/r/20210505135407.31590-1-mhocko@kernel.org
Fixes: d3378e86d1 ("mm/gup: check page posion status for coredump.")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Aili Yao <yaoaili@kingsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Arnd Bergmann
f9f74dc218 mm/shuffle: fix section mismatch warning
clang sometimes decides not to inline shuffle_zone(), but it calls a
__meminit function.  Without the extra __meminit annotation we get this
warning:

  WARNING: modpost: vmlinux.o(.text+0x2a86d4): Section mismatch in reference from the function shuffle_zone() to the function .meminit.text:__shuffle_zone()
  The function shuffle_zone() references
  the function __meminit __shuffle_zone().
  This is often because shuffle_zone lacks a __meminit
  annotation or the annotation of __shuffle_zone is wrong.

shuffle_free_memory() did not show the same problem in my tests, but it
could happen in theory as well, so mark both as __meminit.

Link: https://lkml.kernel.org/r/20210514135952.2928094-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
Linus Torvalds
4ff2473bdb Merge tag 'block-5.13-2021-05-22' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:

 - Fix BLKRRPART and deletion race (Gulam, Christoph)

 - NVMe pull request (Christoph):
      - nvme-tcp corruption and timeout fixes (Sagi Grimberg, Keith
        Busch)
      - nvme-fc teardown fix (James Smart)
      - nvmet/nvme-loop memory leak fixes (Wu Bo)"

* tag 'block-5.13-2021-05-22' of git://git.kernel.dk/linux-block:
  block: fix a race between del_gendisk and BLKRRPART
  block: prevent block device lookups at the beginning of del_gendisk
  nvme-fc: clear q_live at beginning of association teardown
  nvme-tcp: rerun io_work if req_list is not empty
  nvme-tcp: fix possible use-after-completion
  nvme-loop: fix memory leak in nvme_loop_create_ctrl()
  nvmet: fix memory leak in nvmet_alloc_ctrl()
2021-05-22 07:40:34 -10:00
Linus Torvalds
b9231dfbcb Merge tag 'io_uring-5.13-2021-05-22' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
 "One fix for a regression with poll in this merge window, and another
  just hardens the io-wq exit path a bit"

* tag 'io_uring-5.13-2021-05-22' of git://git.kernel.dk/linux-block:
  io_uring: fortify tctx/io_wq cleanup
  io_uring: don't modify req->poll for rw
2021-05-22 07:36:36 -10:00
Linus Torvalds
23d7292630 Merge tag 'for-linus-5.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:

 - a fix for a boot regression when running as PV guest on hardware
   without NX support

 - a small series fixing a bug in the Xen pciback driver when
   configuring a PCI card with multiple virtual functions

* tag 'for-linus-5.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen-pciback: reconfigure also from backend watch handler
  xen-pciback: redo VF placement in the virtual topology
  x86/Xen: swap NX determination and GDT setup on BSP
2021-05-22 07:33:09 -10:00
Linus Torvalds
a3969ef463 Merge tag 'xfs-5.13-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:

 - Fix some math errors in the realtime allocator when extent size hints
   are applied.

 - Fix unnecessary short writes to realtime files when free space is
   fragmented.

 - Fix a crash when using scrub tracepoints.

 - Restore ioctl uapi definitions that were accidentally removed in
   5.13-rc1.

* tag 'xfs-5.13-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: restore old ioctl definitions
  xfs: fix deadlock retry tracepoint arguments
  xfs: retry allocations when locality-based search fails
  xfs: adjust rt allocation minlen when extszhint > rtextsize
2021-05-21 18:45:09 -10:00
Linus Torvalds
45af60e7ce Merge tag 'for-5.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
 "A few more fixes:

   - fix unaligned compressed writes in zoned mode

   - fix false positive lockdep warning when cloning inline extent

   - remove wrong BUG_ON in tree-log error handling"

* tag 'for-5.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: zoned: fix parallel compressed writes
  btrfs: zoned: pass start block to btrfs_use_zone_append
  btrfs: do not BUG_ON in link_to_fixup_dir
  btrfs: release path before starting transaction when cloning inline extent
2021-05-21 13:24:12 -10:00
Linus Torvalds
8bb14ca171 Merge tag '5.13-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
 "Seven smb3 fixes: one for stable, three others fix problems found in
  testing handle leases, and a compounded request fix"

* tag '5.13-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6:
  Fix KASAN identified use-after-free issue.
  Defer close only when lease is enabled.
  Fix kernel oops when CONFIG_DEBUG_ATOMIC_SLEEP is enabled.
  cifs: Fix inconsistent indenting
  cifs: fix memory leak in smb2_copychunk_range
  SMB3: incorrect file id in requests compounded with open
  cifs: remove deadstore in cifs_close_all_deferred_files()
2021-05-21 13:12:51 -10:00
Linus Torvalds
e8085a0709 Merge tag 'gpio-fixes-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:

 - add missing MODULE_DEVICE_TABLE in gpio-cadence

 - fix a kernel doc validator error in gpio-xilinx

 - don't set parent IRQ affinity in gpio-tegra186

* tag 'gpio-fixes-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: tegra186: Don't set parent IRQ affinity
  gpio: xilinx: Correct kernel doc for xgpio_probe()
  gpio: cadence: Add missing MODULE_DEVICE_TABLE
2021-05-21 13:11:00 -10:00
Linus Torvalds
011ff616ff Merge tag 'mmc-v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC host fixes from Ulf Hansson:

 - Fix SD-card detection on Intel NUC10i3FNK4 (GL9755)

 - Replace WARN_ONCE with dev_warn_once for scatterlist offsets

 - Extend check of scatterlist size alignment with SD_IO_RW_EXTENDED

* tag 'mmc-v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-pci-gli: increase 1.8V regulator wait
  mmc: meson-gx: also check SD_IO_RW_EXTENDED for scatterlist size alignment
  mmc: meson-gx: make replace WARN_ONCE with dev_warn_once about scatterlist offset alignment
2021-05-21 06:31:34 -10:00
Linus Torvalds
5328bf8ba4 Merge tag 'devicetree-fixes-for-5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:

 - Another batch of removing unneeded type references in schemas

 - Fix some out of date filename references

 - Convert renesas,drif schema to use DT graph schema

* tag 'devicetree-fixes-for-5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: More removals of type references on common properties
  dt-bindings: media: renesas,drif: Use graph schema
  leds: Fix reference file name of documentation
  dt-bindings: phy: cadence-torrent: update reference file of docs
2021-05-21 06:24:45 -10:00
Linus Torvalds
a0e31f3a38 Merge branch 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull siginfo fix from Eric Biederman:
 "During the merge window an issue with si_perf and the siginfo ABI came
  up. The alpha and sparc siginfo structure layout had changed with the
  addition of SIGTRAP TRAP_PERF and the new field si_perf.

  The reason only alpha and sparc were affected is that they are the
  only architectures that use si_trapno.

  Looking deeper it was discovered that si_trapno is used for only a few
  select signals on alpha and sparc, and that none of the other
  _sigfault fields past si_addr are used at all. Which means technically
  no regression on alpha and sparc.

  While the alignment concerns might be dismissed the abuse of si_errno
  by SIGTRAP TRAP_PERF does have the potential to cause regressions in
  existing userspace.

  While we still have time before userspace starts using and depending
  on the new definition siginfo for SIGTRAP TRAP_PERF this set of
  changes cleans up siginfo_t.

   - The si_trapno field is demoted from magic alpha and sparc status
     and made an ordinary union member of the _sigfault member of
     siginfo_t. Without moving it of course.

   - si_perf is replaced with si_perf_data and si_perf_type ending the
     abuse of si_errno.

   - Unnecessary additions to signalfd_siginfo are removed"

* 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  signalfd: Remove SIL_PERF_EVENT fields from signalfd_siginfo
  signal: Deliver all of the siginfo perf data in _perf
  signal: Factor force_sig_perf out of perf_sigtrap
  signal: Implement SIL_FAULT_TRAPNO
  siginfo: Move si_trapno inside the union inside _si_fault
2021-05-21 06:12:52 -10:00
Linus Torvalds
c1f47ebc9b Merge tag 'modules-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull module fix from Jessica Yu:
 "When CONFIG_MODULE_UNLOAD=n, module exit sections get sorted into the
  init region of the module in order to satisfy the requirements of
  jump_labels and static_calls.

  Previously, the exit section check was done in module_init_section(),
  but the solution there is not completely arch-indepedent as ARM is a
  special case and supplies its own module_init_section() function.

  Instead of pushing this logic further to the arch-specific code,
  switch to an arch-independent solution to check for module exit
  sections in the core module loader code in layout_sections() instead"

* tag 'modules-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  module: check for exit sections in layout_sections() instead of module_init_section()
2021-05-21 06:09:17 -10:00
Linus Torvalds
93bb533a34 Merge tag 'for-linus' of git://github.com/openrisc/linux
Pull OpenRISC fixes from Stafford Horne:
 "A few fixes that came in around the time of the merge window"

* tag 'for-linus' of git://github.com/openrisc/linux:
  openrisc: Define memory barrier mb
  openrisc: mm/init.c: remove unused variable 'end' in paging_init()
  openrisc: mm/init.c: remove unused memblock_region variable in map_ram()
  openrisc: Fix a memory leak
2021-05-21 06:06:19 -10:00
Tony Lindgren
d61f263495 Merge branch 'omap-for-v5.13/genpd-cleanup' into omap-for-v5.14/cleanup 2021-05-21 12:42:41 +03:00
Dario Binacchi
57f2bf41b9 ARM: OMAP2+: remove omap2_set_globals_control()
The function is no longer used, so let's remove it.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2021-05-21 12:28:47 +03:00
Dario Binacchi
ac189a7a99 ARM: OMAP2+: CM: remove omap2_set_globals_cm()
The function is no longer used, so let's remove it.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2021-05-21 12:27:59 +03:00
Juerg Haefliger
68f6941a6a ARM: OMAP1: Remove leading spaces in Kconfig
Remove leading spaces before tabs in Kconfig file(s) by running the
following command:

  $ find arch/arm/mach-omap1 -name 'Kconfig*' | \
    xargs sed -r -i 's/^[ ]+\t/\t/'

Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2021-05-21 12:12:15 +03:00
Jan Beulich
c81d3d2460 xen-pciback: reconfigure also from backend watch handler
When multiple PCI devices get assigned to a guest right at boot, libxl
incrementally populates the backend tree. The writes for the first of
the devices trigger the backend watch. In turn xen_pcibk_setup_backend()
will set the XenBus state to Initialised, at which point no further
reconfigures would happen unless a device got hotplugged. Arrange for
reconfigure to also get triggered from the backend watch handler.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/2337cbd6-94b9-4187-9862-c03ea12e0c61@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
2021-05-21 09:55:16 +02:00