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Merge tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux

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Pull CRC updates from Eric Biggers:

 - Reorganize the architecture-optimized CRC code

   It now lives in lib/crc/$(SRCARCH)/ rather than arch/$(SRCARCH)/lib/,
   and it is no longer artificially split into separate generic and arch
   modules. This allows better inlining and dead code elimination

   The generic CRC code is also no longer exported, simplifying the API.
   (This mirrors the similar changes to SHA-1 and SHA-2 in lib/crypto/,
   which can be found in the "Crypto library updates" pull request)

 - Improve crc32c() performance on newer x86_64 CPUs on long messages by
   enabling the VPCLMULQDQ optimized code

 - Simplify the crypto_shash wrappers for crc32_le() and crc32c()

   Register just one shash algorithm for each that uses the (fully
   optimized) library functions, instead of unnecessarily providing
   direct access to the generic CRC code

 - Remove unused and obsolete drivers for hardware CRC engines

 - Remove CRC-32 combination functions that are no longer used

 - Add kerneldoc for crc32_le(), crc32_be(), and crc32c()

 - Convert the crc32() macro to an inline function

* tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: (26 commits)
  lib/crc: x86/crc32c: Enable VPCLMULQDQ optimization where beneficial
  lib/crc: x86: Reorganize crc-pclmul static_call initialization
  lib/crc: crc64: Add include/linux/crc64.h to kernel-api.rst
  lib/crc: crc32: Change crc32() from macro to inline function and remove cast
  nvmem: layouts: Switch from crc32() to crc32_le()
  lib/crc: crc32: Document crc32_le(), crc32_be(), and crc32c()
  lib/crc: Explicitly include <linux/export.h>
  lib/crc: Remove ARCH_HAS_* kconfig symbols
  lib/crc: x86: Migrate optimized CRC code into lib/crc/
  lib/crc: sparc: Migrate optimized CRC code into lib/crc/
  lib/crc: s390: Migrate optimized CRC code into lib/crc/
  lib/crc: riscv: Migrate optimized CRC code into lib/crc/
  lib/crc: powerpc: Migrate optimized CRC code into lib/crc/
  lib/crc: mips: Migrate optimized CRC code into lib/crc/
  lib/crc: loongarch: Migrate optimized CRC code into lib/crc/
  lib/crc: arm64: Migrate optimized CRC code into lib/crc/
  lib/crc: arm: Migrate optimized CRC code into lib/crc/
  lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/
  lib/crc: Move files into lib/crc/
  lib/crc32: Remove unused combination support
  ...
This commit is contained in:
Linus Torvalds
2025-07-28 17:43:29 -07:00
parent 8e736a2eea 118da22eb6
commit a578dd095d
101 changed files with 784 additions and 1704 deletions
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21
lib/Kconfig.debug
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@@ -2910,27 +2910,6 @@ config HW_BREAKPOINT_KUNIT_TEST
If unsure, say N.
config CRC_KUNIT_TEST
tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS
depends on KUNIT
default KUNIT_ALL_TESTS
select CRC7
select CRC16
select CRC_T10DIF
select CRC32
select CRC64
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_BENCHMARK
bool "Benchmark for the CRC functions"
depends on CRC_KUNIT_TEST
help
Include benchmarks in the KUnit test suite for the CRC functions.
config SIPHASH_KUNIT_TEST
tristate "Perform selftest on siphash functions" if !KUNIT_ALL_TESTS
depends on KUNIT