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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation either version 2 of the
license or at your option any later version
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 2 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this file is released under the gplv2 and any later version
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usa the gnu gpl is
contained in usr doc copyright gpl on a debian system and in the
file copying in the linux kernel source
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 6 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public licence as published by
the free software foundation either version 2 of the licence or at
your option any later version
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 114 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 or at your option any
later version this program is distributed in the hope that it will
be useful but without any warranty without even the implied warranty
of merchantability or fitness for a particular purpose see the gnu
general public license for more details you should have received a
copy of the gnu general public license along with this program if
not write to the free software foundation 51 franklin street fifth
floor boston ma 02110 1301 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 23 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usa or point your
browser to http www gnu org copyleft gpl html
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usa the full gnu
general public license is included in this distribution in the file
called copying
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 7 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Richard Fontana <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Michael Ellerman <[email protected]> (powerpc)
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this driver is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this driver is distributed in the hope
that it will be useful but without any warranty without even the
implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 18 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free warftware you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 2 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this module is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this module is distributed in the hope
that it will be useful but without any warranty without even the
implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this module if not write to the free software foundation inc 59
temple place suite 330 boston ma 02111 1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program see the file copying if not write to the free
software foundation inc 59 temple place suite 330 boston ma 02111
1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 5 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
|
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the term of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not write to the free software foundation inc
59 temple place suite 330 boston ma 02111 1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the named license
or any later version this program is distributed in the hope that it
will be useful but without any warranty without even the implied
warranty of merchantability or fitness for a particular purpose see
the gnu general public license for more details you should have
received a copy of the gnu general public license along with this
program if not write to the free software foundation inc 59 temple
place suite 330 boston ma 02111 1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 7 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Based on 1 normalized pattern(s):
gnupg is free software you can redistribute it and or modify it
under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version gnupg is distributed in the hope that
it will be useful but without any warranty without even the implied
warranty of merchantability or fitness for a particular purpose see
the gnu general public license for more details you should have
received a copy of the gnu general public license along with this
program if not write to the free software foundation inc 59 temple
place suite 330 boston ma 02111 1307 usa note this code is heavily
based on the gnu mp library actually it s the same code with only
minor changes in the way the data is stored this is to support the
abstraction of an optional secure memory allocation which may be
used to avoid revealing of sensitive data due to paging etc the gnu
mp library itself is published under the lgpl however i decided to
publish this code under the plain gpl
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 14 file(s).
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Detect invalid instruction masks at build time. Some versions of GCC can
warn about the situation, but not all of them, it seems.
Suggested-by: Will Deacon <[email protected]>
Signed-off-by: Jean-Philippe Brucker <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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GCC 8.1.0 reports that the ldadd instruction encoding, recently added to
insn.c, doesn't match the mask and couldn't possibly be identified:
linux/arch/arm64/include/asm/insn.h: In function 'aarch64_insn_is_ldadd':
linux/arch/arm64/include/asm/insn.h:280:257: warning: bitwise comparison always evaluates to false [-Wtautological-compare]
Bits [31:30] normally encode the size of the instruction (1 to 8 bytes)
and the current instruction value only encodes the 4- and 8-byte
variants. At the moment only the BPF JIT needs this instruction, and
doesn't require the 1- and 2-byte variants, but to be consistent with
our other ldr and str instruction encodings, clear the size field in the
insn value.
Fixes: 34b8ab091f9ef57a ("bpf, arm64: use more scalable stadd over ldxr / stxr loop in xadd")
Acked-by: Daniel Borkmann <[email protected]>
Reported-by: Kuninori Morimoto <[email protected]>
Signed-off-by: Yoshihiro Shimoda <[email protected]>
Signed-off-by: Jean-Philippe Brucker <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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Although we merged support for pseudo-nmi using interrupt priority
masking in 5.1, we've since uncovered a number of non-trivial issues
with the implementation. Although there are patches pending to address
these problems, we're facing issues that prevent us from merging them at
this current time:
https://lkml.kernel.org/r/[email protected]
For now, simply mark this optional feature as BROKEN in the hope that we
can fix things properly in the near future.
Cc: <[email protected]> # 5.1
Cc: Julien Thierry <[email protected]>
Acked-by: Marc Zyngier <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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KVM has helpers to handle the condition codes of trapped aarch32
instructions. These are marked __hyp_text and used from HYP, but they
aren't built by the 'hyp' Makefile, which has all the runes to avoid ASAN
and KCOV instrumentation.
Move this code to a new hyp/aarch32.c to avoid a hyp-panic when starting
an aarch32 guest on a host built with the ASAN/KCOV debug options.
Fixes: 021234ef3752f ("KVM: arm64: Make kvm_condition_valid32() accessible from EL2")
Fixes: 8cebe750c4d9a ("arm64: KVM: Make kvm_skip_instr32 available to HYP")
Signed-off-by: James Morse <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
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KVM's pmu.c contains the __hyp_text needed to switch the pmu registers
between host and guest. Because this isn't covered by the 'hyp' Makefile,
it can be built with kasan and friends when these are enabled in Kconfig.
When starting a guest, this results in:
| Kernel panic - not syncing: HYP panic:
| PS:a00003c9 PC:000083000028ada0 ESR:86000007
| FAR:000083000028ada0 HPFAR:0000000029df5300 PAR:0000000000000000
| VCPU:000000004e10b7d6
| CPU: 0 PID: 3088 Comm: qemu-system-aar Not tainted 5.2.0-rc1 #11026
| Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Plat
| Call trace:
| dump_backtrace+0x0/0x200
| show_stack+0x20/0x30
| dump_stack+0xec/0x158
| panic+0x1ec/0x420
| panic+0x0/0x420
| SMP: stopping secondary CPUs
| Kernel Offset: disabled
| CPU features: 0x002,25006082
| Memory Limit: none
| ---[ end Kernel panic - not syncing: HYP panic:
This is caused by functions in pmu.c calling the instrumented
code, which isn't mapped to hyp. From objdump -r:
| RELOCATION RECORDS FOR [.hyp.text]:
| OFFSET TYPE VALUE
| 0000000000000010 R_AARCH64_CALL26 __sanitizer_cov_trace_pc
| 0000000000000018 R_AARCH64_CALL26 __asan_load4_noabort
| 0000000000000024 R_AARCH64_CALL26 __asan_load4_noabort
Move the affected code to a new file under 'hyp's Makefile.
Fixes: 3d91befbb3a0 ("arm64: KVM: Enable !VHE support for :G/:H perf event modifiers")
Cc: Andrew Murray <[email protected]>
Signed-off-by: James Morse <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
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I no longer have time to actively review patches and manage the tree and
it's time to make that official.
Huge thanks to the incredible Linux community and all the contributors
who have put up with me over the past years.
I also take this opportunity to remove the website link to the Columbia
web page, as that information is no longer up to date and I don't know
who manages that anymore.
Signed-off-by: Christoffer Dall <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
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This reverts commit 55143dc23ca4792868ea8c17bce65ca7b3d3e8c4.
This causes build breakags with some Kconfigs so revert for now.
Fixes: 55143dc23ca4 ("drm/amd/display: Don't load DMCU for Raven 1")
Signed-off-by: Dave Airlie <[email protected]>
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Update the formula to calculate temperature:
Currently, current TEMP is calculated as
average of val1 (is calculated by formula 1)
and val2 (is calculated by formula 2). But,
as description in HWM (chapter 10A.3.1.2 Normal Mode.)
If (TEMP_CODE < THCODE2[11:0]) CTEMP value should be val1.
If (TEMP_CODE > THCODE2[11:0]) CTEMP value should be val2.
Signed-off-by: Yoshihiro Kaneko <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
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Update the formula to calculate CTEMP:
Currently, the CTEMP is average of val1 (is calculated by
formula 1) and val2 (is calculated by formula 2). But,
as description in HWM (chapter 10A.3.1.1 Setting of Normal Mode)
If (STEMP < Tj_T) CTEMP value should be val1.
If (STEMP > Tj_T) CTEMP value should be val2.
Signed-off-by: Yoshihiro Kaneko <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
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As evaluation of hardware team, temperature calculation formula
of M3-W is difference from all other SoCs as below:
- M3-W: Tj_1: 116 (so Tj_1 - Tj_3 = 157)
- Others: Tj_1: 126 (so Tj_1 - Tj_3 = 167)
Signed-off-by: Yoshihiro Kaneko <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
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Fix sparse warning:
drivers/thermal/tegra/tegra210-soctherm.c:211:33: warning:
symbol 'tegra210_tsensor_thermtrips' was not declared. Should it be static?
Reported-by: Hulk Robot <[email protected]>
Signed-off-by: YueHaibing <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
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This reverts commit 28694e009e512451ead5519dd801f9869acb1f60.
The commit causes multiple issues in that:
- the added call to ->control does potentially run unclocked
causing a hang of the machine
- the added pinctrl-states are undocumented in the binding
- the added pinctrl-states are not backwards compatible, breaking
old devicetrees.
Fixes: 28694e009e51 ("thermal: rockchip: fix up the tsadc pinctrl setting error")
Signed-off-by: Heiko Stuebner <[email protected]>
Reported-by: kernelci.org bot <[email protected]>
Reported-by: Enric Balletbo Serra <[email protected]>
Reported-by: Vicente Bergas <[email protected]>
Reported-by: Jack Mitchell <[email protected]>
Reported-by: Douglas Anderson <[email protected]>
Tested-by: Douglas Anderson <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
- Fix boosting of new client to be non-preemptive
- Fix to actually bump ready tasks ahead of busywaits
- Includes gvt-fixes-2019-05-21
Signed-off-by: Dave Airlie <[email protected]>
From: Joonas Lahtinen <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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It is possible that unlinked inode enters ext4_setattr() (e.g. if
somebody calls ftruncate(2) on unlinked but still open file). In such
case we should not delete the inode from the orphan list if truncate
fails. Note that this is mostly a theoretical concern as filesystem is
corrupted if we reach this path anyway but let's be consistent in our
orphan handling.
Reviewed-by: Ira Weiny <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: Theodore Ts'o <[email protected]>
Cc: [email protected]
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We didn't wait for outstanding direct IO during truncate in nojournal
mode (as we skip orphan handling in that case). This can lead to fs
corruption or stale data exposure if truncate ends up freeing blocks
and these get reallocated before direct IO finishes. Fix the condition
determining whether the wait is necessary.
CC: [email protected]
Fixes: 1c9114f9c0f1 ("ext4: serialize unlocked dio reads with truncate")
Reviewed-by: Ira Weiny <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: Theodore Ts'o <[email protected]>
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Pull xfs fix from Darrick Wong:
"Fix an accounting mistake where we included the log space when
calculating the reserve space for metadata expansion"
* tag 'xfs-5.2-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: don't reserve per-AG space for an internal log
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Pull NVMe changes from Keith.
* 'nvme-5.2-rc2' of git://git.infradead.org/nvme:
nvme-pci: use blk-mq mapping for unmanaged irqs
nvme: update MAINTAINERS
nvme: copy MTFA field from identify controller
nvme: fix memory leak for power latency tolerance
nvme: release namespace SRCU protection before performing controller ioctls
nvme: merge nvme_ns_ioctl into nvme_ioctl
nvme: remove the ifdef around nvme_nvm_ioctl
nvme: fix srcu locking on error return in nvme_get_ns_from_disk
nvme: Fix known effects
nvme-pci: Sync queues on reset
nvme-pci: Unblock reset_work on IO failure
nvme-pci: Don't disable on timeout in reset state
nvme-pci: Fix controller freeze wait disabling
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Various fixes and changes have been applied to liburing since we
copied some select bits to the kernel testing/examples part, sync
up with liburing to get those changes.
Most notable is the change that split the CQE reading into the peek
and seen event, instead of being just a single function. Also fixes
an unsigned wrap issue in io_uring_submit(), leak of 'fd' in setup
if we fail, and various other little issues.
Signed-off-by: Jens Axboe <[email protected]>
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Currently fails with:
io_uring-bench.o: In function `main':
/home/axboe/git/linux-block/tools/io_uring/io_uring-bench.c:560: undefined reference to `pthread_create'
/home/axboe/git/linux-block/tools/io_uring/io_uring-bench.c:588: undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
Makefile:11: recipe for target 'io_uring-bench' failed
make: *** [io_uring-bench] Error 1
Move -lpthread to the end.
Signed-off-by: Jens Axboe <[email protected]>
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The following is a description of a hang in blk_mq_freeze_queue_wait().
The hang happens on attempt to freeze a queue while another task does
queue unfreeze.
The root cause is an incorrect sequence of percpu_ref_resurrect() and
percpu_ref_kill() and as a result those two can be swapped:
CPU#0 CPU#1
---------------- -----------------
q1 = blk_mq_init_queue(shared_tags)
q2 = blk_mq_init_queue(shared_tags):
blk_mq_add_queue_tag_set(shared_tags):
blk_mq_update_tag_set_depth(shared_tags):
list_for_each_entry()
blk_mq_freeze_queue(q1)
> percpu_ref_kill()
> blk_mq_freeze_queue_wait()
blk_cleanup_queue(q1)
blk_mq_freeze_queue(q1)
> percpu_ref_kill()
^^^^^^ freeze_depth can't guarantee the order
blk_mq_unfreeze_queue()
> percpu_ref_resurrect()
> blk_mq_freeze_queue_wait()
^^^^^^ Hang here!!!!
This wrong sequence raises kernel warning:
percpu_ref_kill_and_confirm called more than once on blk_queue_usage_counter_release!
WARNING: CPU: 0 PID: 11854 at lib/percpu-refcount.c:336 percpu_ref_kill_and_confirm+0x99/0xb0
But the most unpleasant effect is a hang of a blk_mq_freeze_queue_wait(),
which waits for a zero of a q_usage_counter, which never happens
because percpu-ref was reinited (instead of being killed) and stays in
PERCPU state forever.
How to reproduce:
- "insmod null_blk.ko shared_tags=1 nr_devices=0 queue_mode=2"
- cpu0: python Script.py 0; taskset the corresponding process running on cpu0
- cpu1: python Script.py 1; taskset the corresponding process running on cpu1
Script.py:
------
#!/usr/bin/python3
import os
import sys
while True:
on = "echo 1 > /sys/kernel/config/nullb/%s/power" % sys.argv[1]
off = "echo 0 > /sys/kernel/config/nullb/%s/power" % sys.argv[1]
os.system(on)
os.system(off)
------
This bug was first reported and fixed by Roman, previous discussion:
[1] Message id: [email protected]
[2] Message id: [email protected]
[3] https://patchwork.kernel.org/patch/9268199/
Reviewed-by: Hannes Reinecke <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Roman Pen <[email protected]>
Signed-off-by: Bob Liu <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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At this point these fields aren't used for anything, so we can remove
them.
Reviewed-by: Ming Lei <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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We fundamentally do not have a maximum segement size for devices with a
virt boundary. So don't bother checking it, especially given that the
existing checks didn't properly work to start with as we never fully
update the front/back segment size and miss the bi_seg_front_size that
wuld have been required for some cases.
Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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We currently fail to update the front/back segment size in the bio when
deciding to allow an otherwise gappy segement to a device with a
virt boundary. The reason why this did not cause problems is that
devices with a virt boundary fundamentally don't use segments as we
know it and thus don't care. Make that assumption formal by forcing
an unlimited segement size in this case.
Fixes: f6970f83ef79 ("block: don't check if adjacent bvecs in one bio can be mergeable")
Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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Currently ll_merge_requests_fn, unlike all other merge functions,
reduces nr_phys_segments by one if the last segment of the previous,
and the first segment of the next segement are contigous. While this
seems like a nice solution to avoid building smaller than possible
requests it causes a mismatch between the segments actually present
in the request and those iterated over by the bvec iterators, including
__rq_for_each_bio. This can for example mistrigger the single segment
optimization in the nvme-pci driver, and might lead to mismatching
nr_phys_segments number when recalculating the number of request
when inserting a cloned request.
We could possibly work around this by making the bvec iterators take
the front and back segment size into account, but that would require
moving them from the bio to the bio_iter and spreading this mess
over all users of bvecs. Or we could simply remove this optimization
under the assumption that most users already build good enough bvecs,
and that the bio merge patch never cared about this optimization
either. The latter is what this patch does.
dff824b2aadb ("nvme-pci: optimize mapping of small single segment requests").
Reviewed-by: Ming Lei <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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This barrier only applies to the read-modify-write operations; in
particular, it does not apply to the atomic_set() primitive.
Replace the barrier with an smp_mb().
Fixes: 6c0ca7ae292ad ("sbitmap: fix wakeup hang after sbq resize")
Cc: [email protected]
Reported-by: "Paul E. McKenney" <[email protected]>
Reported-by: Peter Zijlstra <[email protected]>
Signed-off-by: Andrea Parri <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Omar Sandoval <[email protected]>
Cc: Ming Lei <[email protected]>
Cc: [email protected]
Cc: "Paul E. McKenney" <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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This barrier only applies to the read-modify-write operations; in
particular, it does not apply to the atomic_set() primitive.
Replace the barrier with an smp_mb().
Fixes: dac56212e8127 ("bio: skip atomic inc/dec of ->bi_cnt for most use cases")
Cc: [email protected]
Reported-by: "Paul E. McKenney" <[email protected]>
Reported-by: Peter Zijlstra <[email protected]>
Signed-off-by: Andrea Parri <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Ming Lei <[email protected]>
Cc: [email protected]
Cc: "Paul E. McKenney" <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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Justin Sanders, who has extensive experience with ATA over Ethernet
in general and AoE SCSI and block-device drivers in particular, is
ready to take on the role of aoe maintainer. The driver needs a more
active maintainer.
Signed-off-by: Ed Cashin <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
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Pull documentation fixes from Jonathan Corbet:
"A handful of fixes for a docs build problem, along with catching the
spdxcheck.py script up with the current state of affairs"
* tag 'docs-5.2-fixes' of git://git.lwn.net/linux:
Documentation: kdump: fix minor typo
scripts/spdxcheck.py: Add dual license subdirectory
scripts/spdxcheck.py: Fix path to deprecated licenses
counter: fix Documentation build error due to incorrect source file name
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We already mitigate erratum 1188873 affecting Cortex-A76 and
Neoverse-N1 r0p0 to r2p0. It turns out that revisions r0p0 to
r3p1 of the same cores are affected by erratum 1418040, which
has the same workaround as 1188873.
Let's expand the range of affected revisions to match 1418040,
and repaint all occurences of 1188873 to 1418040. Whilst we're
there, do a bit of reformating in silicon-errata.txt and drop
a now unnecessary dependency on ARM_ARCH_TIMER_OOL_WORKAROUND.
Signed-off-by: Marc Zyngier <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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The R_AARCH64_PREL16 and R_AARCH64_PREL32 relocations are
documented as permitting a range of [-2^15 .. 2^16), resp.
[-2^31 .. 2^32). It is also documented that this means we
cannot detect overflow in some cases, which is bad.
Since we always interpret the targets of these relocations as
signed quantities (e.g., in the ksymtab handling code), let's
tighten the overflow checks so that targets that are out of
range for our signed interpretation of the relocated quantity
get flagged.
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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If IOMMU_SUPPORT is not enabled (and therefore IOMMU_API is not
selected), struct iommu_fwspec is an empty struct and
IOMMU_FWSPEC_PCI_RC_ATS is not defined, resulting in the following
compilation errors:
drivers/acpi/arm64/iort.c: In function iort_iommu_configure:
drivers/acpi/arm64/iort.c:1079:21: error: struct iommu_fwspec has no member named flag:
dev->iommu_fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS;
^~
drivers/acpi/arm64/iort.c:1079:32: error: IOMMU_FWSPEC_PCI_RC_ATS
undeclared (first use in this function)
dev->iommu_fwspec->flags |= IOMMU_FWSPEC_PCI_RC_ATS;
^~~~~~~~~~~~~~~~~~~~~~~
drivers/acpi/arm64/iort.c:1079:32: note: each undeclared identifier is reported only once for each function it appears in
Move iort_iommu_configure() (and the helpers functions it relies on)
into CONFIG_IOMMU_API preprocessor guarded code so that when
CONFIG_IOMMU_SUPPORT is not enabled we prevent compiling code that is
basically equivalent to no-OP, fixing the build errors.
Cc: Jean-Philippe Brucker <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Robin Murphy <[email protected]>
Link: https://lore.kernel.org/linux-arm-kernel/[email protected]/
Fixes: 5702ee24182f ("ACPI/IORT: Check ATS capability in root complex nodes")
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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The following commit
7290d5809571 ("module: use relative references for __ksymtab entries")
updated the ksymtab handling of some KASLR capable architectures
so that ksymtab entries are emitted as pairs of 32-bit relative
references. This reduces the size of the entries, but more
importantly, it gets rid of statically assigned absolute
addresses, which require fixing up at boot time if the kernel
is self relocating (which takes a 24 byte RELA entry for each
member of the ksymtab struct).
Since ksymtab entries are always part of the same module as the
symbol they export, it was assumed at the time that a 32-bit
relative reference is always sufficient to capture the offset
between a ksymtab entry and its target symbol.
Unfortunately, this is not always true: in the case of per-CPU
variables, a per-CPU variable's base address (which usually differs
from the actual address of any of its per-CPU copies) is allocated
in the vicinity of the ..data.percpu section in the core kernel
(i.e., in the per-CPU reserved region which follows the section
containing the core kernel's statically allocated per-CPU variables).
Since we randomize the module space over a 4 GB window covering
the core kernel (based on the -/+ 4 GB range of an ADRP/ADD pair),
we may end up putting the core kernel out of the -/+ 2 GB range of
32-bit relative references of module ksymtab entries that refer to
per-CPU variables.
So reduce the module randomization range a bit further. We lose
1 bit of randomization this way, but this is something we can
tolerate.
Cc: <[email protected]> # v4.19+
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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Revisions of the Cortex-A76 CPU prior to r4p0 are affected by an erratum
that can prevent interrupts from being taken when single-stepping.
This patch implements a software workaround to prevent userspace from
effectively being able to disable interrupts.
Cc: <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Catalin Marinas <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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During an oops, we print the name of the current task and its pid twice.
We also helpfully advertise its stack limit as "0x(____ptrval____)".
Drop these useless messages.
Signed-off-by: Will Deacon <[email protected]>
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into drm-fixes
Fixes for 5.2:
- Fix for DMCU firmware issues for stable
- Add missing polaris10 pci id to kfd
- Screen corruption fix on picasso
- Fix for driver reload on vega10
- SR-IOV fixes
- Locking fix in new SMU code
- Compute profile switching fix for KFD
Signed-off-by: Dave Airlie <[email protected]>
From: Alex Deucher <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
- sun4i fixes to hdmi phy as well as u16 overflow in dsi (left from -next-fixes)
- gma500 fix to make lvds detection more reliable
- select devfreq for panfrost since it can't probe without it
Signed-off-by: Dave Airlie <[email protected]>
From: Sean Paul <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/20190522194440.GA22359@art_vandelay
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