From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL. Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching") Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com Reported-by: Sashiko Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- lib/crc/Kconfig | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 lib/crc/Kconfig (limited to 'lib/crc/Kconfig') diff --git a/lib/crc/Kconfig b/lib/crc/Kconfig new file mode 100644 index 000000000..927fc6a6b --- /dev/null +++ b/lib/crc/Kconfig @@ -0,0 +1,130 @@ +# SPDX-License-Identifier: GPL-2.0-only + +# Kconfig for the kernel's cyclic redundancy check (CRC) library code + +config CRC4 + tristate + help + The CRC4 library functions. Select this if your module uses any of + the functions from . + +config CRC7 + tristate + help + The CRC7 library functions. Select this if your module uses any of + the functions from . + +config CRC8 + tristate + help + The CRC8 library functions. Select this if your module uses any of + the functions from . + +config CRC16 + tristate + help + The CRC16 library functions. Select this if your module uses any of + the functions from . + +config CRC_CCITT + tristate + help + The CRC-CCITT library functions. Select this if your module uses any + of the functions from . + +config CRC_ITU_T + tristate + help + The CRC-ITU-T library functions. Select this if your module uses + any of the functions from . + +config CRC_T10DIF + tristate + help + The CRC-T10DIF library functions. Select this if your module uses + any of the functions from . + +config CRC_T10DIF_ARCH + bool + depends on CRC_T10DIF && CRC_OPTIMIZATIONS + default y if ARM && KERNEL_MODE_NEON + default y if ARM64 + default y if PPC64 && ALTIVEC + default y if RISCV && RISCV_ISA_ZBC + default y if X86 + +config CRC32 + tristate + select BITREVERSE + help + The CRC32 library functions. Select this if your module uses any of + the functions from or . + +config CRC32_ARCH + bool + depends on CRC32 && CRC_OPTIMIZATIONS + default y if ARM && KERNEL_MODE_NEON + default y if ARM64 + default y if LOONGARCH && 64BIT + default y if MIPS && CPU_MIPSR6 + default y if PPC64 && ALTIVEC + default y if RISCV && RISCV_ISA_ZBC + default y if S390 + default y if SPARC64 + default y if X86 + +config CRC64 + tristate + help + The CRC64 library functions. Select this if your module uses any of + the functions from . + +config CRC64_ARCH + bool + depends on CRC64 && CRC_OPTIMIZATIONS + default y if ARM && KERNEL_MODE_NEON && !CPU_BIG_ENDIAN + default y if ARM64 + default y if RISCV && RISCV_ISA_ZBC && 64BIT + default y if X86_64 + +config CRC_OPTIMIZATIONS + bool "Enable optimized CRC implementations" if EXPERT + depends on !UML + default y + help + Disabling this option reduces code size slightly by disabling the + architecture-optimized implementations of any CRC variants that are + enabled. CRC checksumming performance may get much slower. + + Keep this enabled unless you're really trying to minimize the size of + the kernel. + +config CRC_KUNIT_TEST + tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS + depends on KUNIT && (CRC7 || CRC16 || CRC_T10DIF || CRC32 || CRC64) + default KUNIT_ALL_TESTS + help + Unit tests for the CRC library functions. + + This is intended to help people writing architecture-specific + optimized versions. If unsure, say N. + +config CRC_ENABLE_ALL_FOR_KUNIT + tristate "Enable all CRC functions for KUnit test" + depends on KUNIT + select CRC7 + select CRC16 + select CRC_T10DIF + select CRC32 + select CRC64 + help + Enable all CRC functions that have test code in CRC_KUNIT_TEST. + + Enable this only if you'd like the CRC KUnit test suite to test all + the CRC variants, even ones that wouldn't otherwise need to be built. + +config CRC_BENCHMARK + bool "Benchmark for the CRC functions" + depends on CRC_KUNIT_TEST + help + Include benchmarks in the KUnit test suite for the CRC functions. -- cgit v1.3.1