From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- 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