Merge tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linuxgrafted

Pull io_uring fixes from Jens Axboe:

 - Fix a task_work add use-after-free with SQPOLL.

   The sqpoll thread could pop and complete the last request while
   io_req_normal_work_add() was still looking at them after the mpscq
   push.

   Use the same approach as DEFER_TASKRUN to protect from that, holding
   an RCU read lock across the add, and have exit wait for an RCU grace
   period for SQPOLL rings as well.

 - CQE32 ring fixes: correct the free entry check for 32b CQEs, zero the
   big_cqe for aux CQEs, and only post the dummy skip CQE on CQE_MIXED
   rings

 - Mark the source filter table as COW when cloning bpf filters, so
   registering another filter on the source doesn't modify the shared
   table in place

 - Initialize the task context before running the BPF loop

 - Requeue zcrx multishot receives stopped by a local resource

 - End a TX_TIMESTAMP multishot cmd when the CQ is full (lollipopkit)

* tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring: fix task_work add use-after-free with SQPOLL
  io_uring/cmd_net: end TX_TIMESTAMP multishot when the CQ is full
  io_uring/zcrx: requeue multishot receives stopped by a local resource
  io_uring: initialize task context before running the BPF loop
  io_uring: zero big_cqe for aux CQEs on CQE32 rings
  io_uring: fix free entry check for 32b CQEs on CQE32 rings
  io_uring: only post the dummy skip CQE on CQE_MIXED rings
  io_uring/bpf_filter: mark source as COW when cloning filters

1 files changed, 130 insertions, 0 deletions

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 <linux/crc4.h>.
+
+config CRC7
+	tristate
+	help
+	  The CRC7 library functions.  Select this if your module uses any of
+	  the functions from <linux/crc7.h>.
+
+config CRC8
+	tristate
+	help
+	  The CRC8 library functions.  Select this if your module uses any of
+	  the functions from <linux/crc8.h>.
+
+config CRC16
+	tristate
+	help
+	  The CRC16 library functions.  Select this if your module uses any of
+	  the functions from <linux/crc16.h>.
+
+config CRC_CCITT
+	tristate
+	help
+	  The CRC-CCITT library functions.  Select this if your module uses any
+	  of the functions from <linux/crc-ccitt.h>.
+
+config CRC_ITU_T
+	tristate
+	help
+	  The CRC-ITU-T library functions.  Select this if your module uses
+	  any of the functions from <linux/crc-itu-t.h>.
+
+config CRC_T10DIF
+	tristate
+	help
+	  The CRC-T10DIF library functions.  Select this if your module uses
+	  any of the functions from <linux/crc-t10dif.h>.
+
+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 <linux/crc32.h> or <linux/crc32c.h>.
+
+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 <linux/crc64.h>.
+
+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.