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Rafael J. Wysocki bf28095414 ACPI: processor: perflib: Move problematic pr->performance check commit `d405ec23df` upstream. Commit `d33bd88ac0` ("ACPI: processor: perflib: Fix initial _PPC limit application") added a pr->performance check that prevents the frequency QoS request from being added when the given processor has no performance object. Unfortunately, this causes a WARN() in freq_qos_remove_request() to trigger on an attempt to take the given CPU offline later because the frequency QoS object has not been added for it due to the missing performance object. Address this by moving the pr->performance check before calling acpi_processor_get_platform_limit() so it only prevents a limit from being set for the CPU if the performance object is not present. This way, the frequency QoS request is added as it was before the above commit and it is present all the time along with the CPU's cpufreq policy regardless of whether or not the CPU is online. Fixes: `d33bd88ac0` ("ACPI: processor: perflib: Fix initial _PPC limit application") Tested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: 5.4+ <stable@vger.kernel.org> # 5.4+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://patch.msgid.link/2801421.mvXUDI8C0e@rafael.j.wysocki Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2025-08-20 18:30:16 +02:00
arch	LoongArch: Avoid in-place string operation on FDT content	2025-08-20 18:30:15 +02:00
block	block: ensure discard_granularity is zero when discard is not supported	2025-08-15 12:14:05 +02:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()	2025-07-17 18:37:24 +02:00
Documentation	Documentation: ACPI: Fix parent device references	2025-08-20 18:30:15 +02:00
drivers
fs
include	PCI: Extend isolated function probing to LoongArch	2025-08-20 18:30:14 +02:00
init
io_uring
ipc	ipc: fix to protect IPCS lookups using RCU	2025-06-27 11:11:22 +01:00
kernel
lib
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mm
net
rust	rust: use `#[used(compiler)]` to fix build and `modpost` with Rust >= 1.89.0	2025-07-24 08:56:37 +02:00
samples
scripts
security	apparmor: Fix unaligned memory accesses in KUnit test	2025-08-15 12:13:59 +02:00
sound
tools	selftests/bpf: Fix build error with llvm 19	2025-08-15 12:14:10 +02:00
usr
virt
.clang-format
.clippy.toml
.cocciconfig
.editorconfig
.get_maintainer.ignore	Add Jeff Kirsher to .get_maintainer.ignore	2024-03-08 11:36:54 +00:00
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.mailmap	mailmap: add entry for Thorsten Blum	2024-11-07 14:14:59 -08:00
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Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.