linux-stable.git/lib/crc/Kconfig, branch linux-rolling-lts

lib/crc: tests: Add CRC_ENABLE_ALL_FOR_KUNIT

2026-04-27T13:27:29+00:00

commit cdf22aeaad8430905c3aa3b3d0f2686c65395c22 upstream.

Now that crc_kunit uses the standard "depends on" pattern, enabling the
full set of CRC tests is a bit difficult, mainly due to CRC7 being
rarely used.  Add a kconfig option to make it easier.  It is visible
only when KUNIT, so hopefully the extra prompt won't be too annoying.

Link: https://lore.kernel.org/r/20260306033557.250499-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers 
Signed-off-by: Greg Kroah-Hartman

lib/crc: tests: Make crc_kunit test only the enabled CRC variants

2026-04-27T13:27:29+00:00

commit 85c9f3a2b805eb96d899da7bcc38a16459aa3c16 upstream.

Like commit 4478e8eeb871 ("lib/crypto: tests: Depend on library options
rather than selecting them") did with the crypto library tests, make
crc_kunit depend on the code it tests rather than selecting it.  This
follows the standard convention for KUnit and fixes an issue where
enabling KUNIT_ALL_TESTS enabled non-test code.

crc_kunit does differ from the crypto library tests in that it
consolidates the tests for multiple CRC variants, with 5 kconfig
options, into one KUnit suite.  Since depending on *all* of these
kconfig options would greatly restrict the ability to enable crc_kunit,
instead just depend on *any* of these options.  Update crc_kunit
accordingly to test only the reachable code.

Alternatively we could split crc_kunit into 5 test suites.  But keeping
it as one is simpler for now.

Fixes: e47d9b1a76ed ("lib/crc_kunit.c: add KUnit test suite for CRC library functions")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20260306033557.250499-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers 
Signed-off-by: Greg Kroah-Hartman

lib/crc: Remove ARCH_HAS_* kconfig symbols

2025-06-30T16:31:57+00:00

These symbols are no longer used, so remove them.

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-13-ebiggers@kernel.org
Signed-off-by: Eric Biggers

lib/crc: x86: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57+00:00

Move the x86-optimized CRC code from arch/x86/lib/crc* into its new
location in lib/crc/x86/, and wire it up in the new way.  This new way
of organizing the CRC code eliminates the need to artificially split the
code for each CRC variant into separate arch and generic modules,
enabling better inlining and dead code elimination.  For more details,
see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/".

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-12-ebiggers@kernel.org
Signed-off-by: Eric Biggers

lib/crc: sparc: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57+00:00

Move the sparc-optimized CRC code from arch/sparc/lib/crc* into its new
location in lib/crc/sparc/, and wire it up in the new way.  This new way
of organizing the CRC code eliminates the need to artificially split the
code for each CRC variant into separate arch and generic modules,
enabling better inlining and dead code elimination.  For more details,
see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/".

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-11-ebiggers@kernel.org
Signed-off-by: Eric Biggers

lib/crc: s390: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57+00:00

Move the s390-optimized CRC code from arch/s390/lib/crc* into its new
location in lib/crc/s390/, and wire it up in the new way.  This new way
of organizing the CRC code eliminates the need to artificially split the
code for each CRC variant into separate arch and generic modules,
enabling better inlining and dead code elimination.  For more details,
see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/".

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-10-ebiggers@kernel.org
Signed-off-by: Eric Biggers

lib/crc: riscv: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57+00:00

Move the riscv-optimized CRC code from arch/riscv/lib/crc* into its new
location in lib/crc/riscv/, and wire it up in the new way.  This new way
of organizing the CRC code eliminates the need to artificially split the
code for each CRC variant into separate arch and generic modules,
enabling better inlining and dead code elimination.  For more details,
see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/".

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-9-ebiggers@kernel.org
Signed-off-by: Eric Biggers

lib/crc: powerpc: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57+00:00

Move the powerpc-optimized CRC code from arch/powerpc/lib/crc* into its
new location in lib/crc/powerpc/, and wire it up in the new way.  This
new way of organizing the CRC code eliminates the need to artificially
split the code for each CRC variant into separate arch and generic
modules, enabling better inlining and dead code elimination.  For more
details, see "lib/crc: Prepare for arch-optimized code in subdirs of
lib/crc/".

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-8-ebiggers@kernel.org
Signed-off-by: Eric Biggers

lib/crc: mips: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57+00:00

Move the mips-optimized CRC code from arch/mips/lib/crc* into its new
location in lib/crc/mips/, and wire it up in the new way.  This new way
of organizing the CRC code eliminates the need to artificially split the
code for each CRC variant into separate arch and generic modules,
enabling better inlining and dead code elimination.  For more details,
see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/".

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-7-ebiggers@kernel.org
Signed-off-by: Eric Biggers

lib/crc: loongarch: Migrate optimized CRC code into lib/crc/

2025-06-30T16:31:57+00:00

Move the loongarch-optimized CRC code from arch/loongarch/lib/crc* into
its new location in lib/crc/loongarch/, and wire it up in the new way.
This new way of organizing the CRC code eliminates the need to
artificially split the code for each CRC variant into separate arch and
generic modules, enabling better inlining and dead code elimination.
For more details, see "lib/crc: Prepare for arch-optimized code in
subdirs of lib/crc/".

Reviewed-by: "Martin K. Petersen" 
Acked-by: Ingo Molnar 
Acked-by: "Jason A. Donenfeld" 
Link: https://lore.kernel.org/r/20250607200454.73587-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers