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

Pull CRC updates from Eric Biggers:

 - Reorganize the architecture-optimized CRC32 and CRC-T10DIF code to be
   directly accessible via the library API, instead of requiring the
   crypto API. This is much simpler and more efficient.

 - Convert some users such as ext4 to use the CRC32 library API instead
   of the crypto API. More conversions like this will come later.

 - Add a KUnit test that tests and benchmarks multiple CRC variants.
   Remove older, less-comprehensive tests that are made redundant by
   this.

 - Add an entry to MAINTAINERS for the kernel's CRC library code. I'm
   volunteering to maintain it. I have additional cleanups and
   optimizations planned for future cycles.

* tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: (31 commits)
  MAINTAINERS: add entry for CRC library
  powerpc/crc: delete obsolete crc-vpmsum_test.c
  lib/crc32test: delete obsolete crc32test.c
  lib/crc16_kunit: delete obsolete crc16_kunit.c
  lib/crc_kunit.c: add KUnit test suite for CRC library functions
  powerpc/crc-t10dif: expose CRC-T10DIF function through lib
  arm64/crc-t10dif: expose CRC-T10DIF function through lib
  arm/crc-t10dif: expose CRC-T10DIF function through lib
  x86/crc-t10dif: expose CRC-T10DIF function through lib
  crypto: crct10dif - expose arch-optimized lib function
  lib/crc-t10dif: add support for arch overrides
  lib/crc-t10dif: stop wrapping the crypto API
  scsi: target: iscsi: switch to using the crc32c library
  f2fs: switch to using the crc32 library
  jbd2: switch to using the crc32c library
  ext4: switch to using the crc32c library
  lib/crc32: make crc32c() go directly to lib
  bcachefs: Explicitly select CRYPTO from BCACHEFS_FS
  x86/crc32: expose CRC32 functions through lib
  x86/crc32: update prototype for crc32_pclmul_le_16()
  ...

Author: torvalds

MAINTAINERS

@@ -6092,6 +6092,17 @@ S:	Maintained
 F:	Documentation/filesystems/cramfs.rst
 F:	fs/cramfs/
 
+CRC LIBRARY
+M:	Eric Biggers <ebiggers@kernel.org>
+R:	Ard Biesheuvel <ardb@kernel.org>
+L:	linux-crypto@vger.kernel.org
+S:	Maintained
+T:	git https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git crc-next
+F:	Documentation/staging/crc*
+F:	arch/*/lib/crc*
+F:	include/linux/crc*
+F:	lib/crc*
+
 CREATIVE SB0540
 M:	Bastien Nocera <hadess@hadess.net>
 L:	linux-input@vger.kernel.org

arch/arm/Kconfig

@@ -7,6 +7,8 @@ config ARM
 	select ARCH_HAS_BINFMT_FLAT
 	select ARCH_HAS_CPU_CACHE_ALIASING
 	select ARCH_HAS_CPU_FINALIZE_INIT if MMU
+	select ARCH_HAS_CRC32 if KERNEL_MODE_NEON
+	select ARCH_HAS_CRC_T10DIF if KERNEL_MODE_NEON
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_HAS_DEBUG_VIRTUAL if MMU
 	select ARCH_HAS_DMA_ALLOC if MMU

arch/arm/configs/milbeaut_m10v_defconfig

@@ -107,7 +107,6 @@ CONFIG_CRYPTO_AES_ARM=m
 CONFIG_CRYPTO_AES_ARM_BS=m
 CONFIG_CRYPTO_AES_ARM_CE=m
 CONFIG_CRYPTO_CHACHA20_NEON=m
-CONFIG_CRYPTO_CRC32_ARM_CE=m
 # CONFIG_CRYPTO_HW is not set
 CONFIG_CRC_CCITT=m
 CONFIG_CRC_ITU_T=m

arch/arm/configs/multi_v7_defconfig

@@ -1306,7 +1306,6 @@ CONFIG_CRYPTO_AES_ARM=m
 CONFIG_CRYPTO_AES_ARM_BS=m
 CONFIG_CRYPTO_AES_ARM_CE=m
 CONFIG_CRYPTO_CHACHA20_NEON=m
-CONFIG_CRYPTO_CRC32_ARM_CE=m
 CONFIG_CRYPTO_DEV_SUN4I_SS=m
 CONFIG_CRYPTO_DEV_FSL_CAAM=m
 CONFIG_CRYPTO_DEV_EXYNOS_RNG=m

arch/arm/crypto/Kconfig

@@ -222,30 +222,5 @@ config CRYPTO_CHACHA20_NEON
 	  Architecture: arm using:
 	  - NEON (Advanced SIMD) extensions
 
-config CRYPTO_CRC32_ARM_CE
-	tristate "CRC32C and CRC32"
-	depends on KERNEL_MODE_NEON
-	depends on CRC32
-	select CRYPTO_HASH
-	help
-	  CRC32c CRC algorithm with the iSCSI polynomial (RFC 3385 and RFC 3720)
-	  and CRC32 CRC algorithm (IEEE 802.3)
-
-	  Architecture: arm using:
-	  - CRC and/or PMULL instructions
-
-	  Drivers: crc32-arm-ce and crc32c-arm-ce
-
-config CRYPTO_CRCT10DIF_ARM_CE
-	tristate "CRCT10DIF"
-	depends on KERNEL_MODE_NEON
-	depends on CRC_T10DIF
-	select CRYPTO_HASH
-	help
-	  CRC16 CRC algorithm used for the T10 (SCSI) Data Integrity Field (DIF)
-
-	  Architecture: arm using:
-	  - PMULL (Polynomial Multiply Long) instructions
-
 endmenu
 

arch/arm/crypto/Makefile

@@ -20,8 +20,6 @@ obj-$(CONFIG_CRYPTO_AES_ARM_CE) += aes-arm-ce.o
 obj-$(CONFIG_CRYPTO_SHA1_ARM_CE) += sha1-arm-ce.o
 obj-$(CONFIG_CRYPTO_SHA2_ARM_CE) += sha2-arm-ce.o
 obj-$(CONFIG_CRYPTO_GHASH_ARM_CE) += ghash-arm-ce.o
-obj-$(CONFIG_CRYPTO_CRCT10DIF_ARM_CE) += crct10dif-arm-ce.o
-obj-$(CONFIG_CRYPTO_CRC32_ARM_CE) += crc32-arm-ce.o
 
 aes-arm-y	:= aes-cipher-core.o aes-cipher-glue.o
 aes-arm-bs-y	:= aes-neonbs-core.o aes-neonbs-glue.o
@@ -37,8 +35,6 @@ sha1-arm-ce-y	:= sha1-ce-core.o sha1-ce-glue.o
 sha2-arm-ce-y	:= sha2-ce-core.o sha2-ce-glue.o
 aes-arm-ce-y	:= aes-ce-core.o aes-ce-glue.o
 ghash-arm-ce-y	:= ghash-ce-core.o ghash-ce-glue.o
-crct10dif-arm-ce-y	:= crct10dif-ce-core.o crct10dif-ce-glue.o
-crc32-arm-ce-y:= crc32-ce-core.o crc32-ce-glue.o
 chacha-neon-y := chacha-scalar-core.o chacha-glue.o
 chacha-neon-$(CONFIG_KERNEL_MODE_NEON) += chacha-neon-core.o
 poly1305-arm-y := poly1305-core.o poly1305-glue.o