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lib/crc: Move files into lib/crc/

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Move all CRC files in lib/ into a subdirectory lib/crc/ to keep them
from cluttering up the main lib/ directory.

Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: "Jason A. Donenfeld" <Jason@zx2c4.com>
Link: https://lore.kernel.org/r/20250607200454.73587-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
This commit is contained in:
Eric Biggers committed 2025-06-30 09:31:57 -07:00
1 parent f2703a104e
commit 89a5159140
23 files changed
+164 -166
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Documentation/core-api/kernel-api.rst
+7 -7
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@@ -136,24 +136,24 @@ Arithmetic Overflow Checking
CRC Functions
-------------
.. kernel-doc:: lib/crc4.c
.. kernel-doc:: lib/crc/crc4.c
:export:
.. kernel-doc:: lib/crc7.c
.. kernel-doc:: lib/crc/crc7.c
:export:
.. kernel-doc:: lib/crc8.c
.. kernel-doc:: lib/crc/crc8.c
:export:
.. kernel-doc:: lib/crc16.c
.. kernel-doc:: lib/crc/crc16.c
:export:
.. kernel-doc:: lib/crc32.c
.. kernel-doc:: lib/crc/crc32.c
.. kernel-doc:: lib/crc-ccitt.c
.. kernel-doc:: lib/crc/crc-ccitt.c
:export:
.. kernel-doc:: lib/crc-itu-t.c
.. kernel-doc:: lib/crc/crc-itu-t.c
:export:
Base 2 log and power Functions
MAINTAINERS
+1 -2
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@@ -6361,8 +6361,7 @@ T: git https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git crc-ne
F: Documentation/staging/crc*
F: arch/*/lib/crc*
F: include/linux/crc*
F: lib/crc*
F: lib/tests/crc_kunit.c
F: lib/crc/
F: scripts/gen-crc-consts.py
CREATIVE SB0540
include/linux/crc64.h
-3
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@@ -1,7 +1,4 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* See lib/crc64.c for the related specification and polynomial arithmetic.
*/
#ifndef _LINUX_CRC64_H
#define _LINUX_CRC64_H
lib/Kconfig
+1 -87
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@@ -136,95 +136,9 @@ config TRACE_MMIO_ACCESS
Create tracepoints for MMIO read/write operations. These trace events
can be used for logging all MMIO read/write operations.
source "lib/crc/Kconfig"
source "lib/crypto/Kconfig"
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 CRC16
tristate
help
The CRC16 library functions. Select this if your module uses any of
the functions from <linux/crc16.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 ARCH_HAS_CRC_T10DIF
bool
config CRC_T10DIF_ARCH
tristate
default CRC_T10DIF if ARCH_HAS_CRC_T10DIF && CRC_OPTIMIZATIONS
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 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 ARCH_HAS_CRC32
bool
config CRC32_ARCH
tristate
default CRC32 if ARCH_HAS_CRC32 && CRC_OPTIMIZATIONS
config CRC64
tristate
help
The CRC64 library functions. Select this if your module uses any of
the functions from <linux/crc64.h>.
config ARCH_HAS_CRC64
bool
config CRC64_ARCH
tristate
default CRC64 if ARCH_HAS_CRC64 && CRC_OPTIMIZATIONS
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 CRC_OPTIMIZATIONS
bool "Enable optimized CRC implementations" if EXPERT
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 XXHASH
tristate
lib/Kconfig.debug
-21
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@@ -2901,27 +2901,6 @@ 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
lib/Makefile
+1 -31
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@@ -122,7 +122,7 @@ endif
obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o
CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
obj-y += math/ crypto/ tests/ vdso/
obj-y += math/ crc/ crypto/ tests/ vdso/
obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
@@ -148,15 +148,6 @@ obj-$(CONFIG_BITREVERSE) += bitrev.o
obj-$(CONFIG_LINEAR_RANGES) += linear_ranges.o
obj-$(CONFIG_PACKING) += packing.o
obj-$(CONFIG_PACKING_KUNIT_TEST) += packing_test.o
obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
obj-$(CONFIG_CRC16) += crc16.o
obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o
obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
obj-$(CONFIG_CRC32) += crc32.o
obj-$(CONFIG_CRC64) += crc64.o
obj-$(CONFIG_CRC4) += crc4.o
obj-$(CONFIG_CRC7) += crc7.o
obj-$(CONFIG_CRC8) += crc8.o
obj-$(CONFIG_XXHASH) += xxhash.o
obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
@@ -294,27 +285,6 @@ obj-$(CONFIG_ASN1_ENCODER) += asn1_encoder.o
obj-$(CONFIG_FONT_SUPPORT) += fonts/
hostprogs := gen_crc32table
hostprogs += gen_crc64table
clean-files := crc32table.h
clean-files += crc64table.h
$(obj)/crc32.o: $(obj)/crc32table.h
quiet_cmd_crc32 = GEN $@
cmd_crc32 = $< > $@
$(obj)/crc32table.h: $(obj)/gen_crc32table
$(call cmd,crc32)
$(obj)/crc64.o: $(obj)/crc64table.h
quiet_cmd_crc64 = GEN $@
cmd_crc64 = $< > $@
$(obj)/crc64table.h: $(obj)/gen_crc64table
$(call cmd,crc64)
#
# Build a fast OID lookip registry from include/linux/oid_registry.h
#
lib/crc/.gitignore
+5
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@@ -0,0 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
/crc32table.h
/crc64table.h
/gen_crc32table
/gen_crc64table
lib/crc/Kconfig
+111
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@@ -0,0 +1,111 @@
# 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 ARCH_HAS_CRC_T10DIF
bool
config CRC_T10DIF_ARCH
tristate
default CRC_T10DIF if ARCH_HAS_CRC_T10DIF && CRC_OPTIMIZATIONS
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 ARCH_HAS_CRC32
bool
config CRC32_ARCH
tristate
default CRC32 if ARCH_HAS_CRC32 && CRC_OPTIMIZATIONS
config CRC64
tristate
help
The CRC64 library functions. Select this if your module uses any of
the functions from <linux/crc64.h>.
config ARCH_HAS_CRC64
bool
config CRC64_ARCH
tristate
default CRC64 if ARCH_HAS_CRC64 && CRC_OPTIMIZATIONS
config CRC_OPTIMIZATIONS
bool "Enable optimized CRC implementations" if EXPERT
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
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.
lib/crc/Makefile
+32
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@@ -0,0 +1,32 @@
# SPDX-License-Identifier: GPL-2.0-only
# Makefile for the kernel's cyclic redundancy check (CRC) library code
obj-$(CONFIG_CRC4) += crc4.o
obj-$(CONFIG_CRC7) += crc7.o
obj-$(CONFIG_CRC8) += crc8.o
obj-$(CONFIG_CRC16) += crc16.o
obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
obj-$(CONFIG_CRC_T10DIF) += crc-t10dif.o
obj-$(CONFIG_CRC32) += crc32.o
obj-$(CONFIG_CRC64) += crc64.o
obj-y += tests/
hostprogs := gen_crc32table gen_crc64table
clean-files := crc32table.h crc64table.h
$(obj)/crc32.o: $(obj)/crc32table.h
$(obj)/crc64.o: $(obj)/crc64table.h
quiet_cmd_crc32 = GEN $@
cmd_crc32 = $< > $@
quiet_cmd_crc64 = GEN $@
cmd_crc64 = $< > $@
$(obj)/crc32table.h: $(obj)/gen_crc32table
$(call cmd,crc32)
$(obj)/crc64table.h: $(obj)/gen_crc64table
$(call cmd,crc64)
lib/crc-ccitt.c → lib/crc/crc-ccitt.c
-3
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@@ -1,7 +1,4 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/lib/crc-ccitt.c
*/
#include <linux/types.h>
#include <linux/module.h>
lib/crc-itu-t.c → lib/crc/crc-itu-t.c
View File
File renamed without changes.
lib/crc-t10dif.c → lib/crc/crc-t10dif.c
View File
File renamed without changes.
lib/crc16.c → lib/crc/crc16.c
View File
File renamed without changes.
lib/crc32.c → lib/crc/crc32.c
View File
File renamed without changes.
lib/crc4.c → lib/crc/crc4.c
View File
File renamed without changes.
lib/crc64.c → lib/crc/crc64.c
View File
File renamed without changes.
lib/crc7.c → lib/crc/crc7.c
View File
File renamed without changes.
lib/crc8.c → lib/crc/crc8.c
View File
File renamed without changes.
lib/gen_crc32table.c → lib/crc/gen_crc32table.c
+2 -2
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@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include "../include/linux/crc32poly.h"
#include "../include/generated/autoconf.h"
#include "../../include/linux/crc32poly.h"
#include "../../include/generated/autoconf.h"
#include <inttypes.h>
static uint32_t crc32table_le[256];
lib/gen_crc64table.c → lib/crc/gen_crc64table.c
+2 -9
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@@ -1,14 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Generate lookup table for the table-driven CRC64 calculation.
*
* gen_crc64table is executed in kernel build time and generates
* lib/crc64table.h. This header is included by lib/crc64.c for
* the table-driven CRC64 calculation.
*
* See lib/crc64.c for more information about which specification
* and polynomial arithmetic that gen_crc64table.c follows to
* generate the lookup table.
* This host program runs at kernel build time and generates the lookup tables
* used by the generic CRC64 code.
*
* Copyright 2018 SUSE Linux.
* Author: Coly Li <colyli@suse.de>
lib/crc/tests/Makefile
+2
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@@ -0,0 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_CRC_KUNIT_TEST) += crc_kunit.o
lib/tests/crc_kunit.c → lib/crc/tests/crc_kunit.c
View File
File renamed without changes.
lib/tests/Makefile
-1
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@@ -10,7 +10,6 @@ obj-$(CONFIG_BLACKHOLE_DEV_KUNIT_TEST) += blackhole_dev_kunit.o
obj-$(CONFIG_CHECKSUM_KUNIT) += checksum_kunit.o
obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
obj-$(CONFIG_CPUMASK_KUNIT_TEST) += cpumask_kunit.o
obj-$(CONFIG_CRC_KUNIT_TEST) += crc_kunit.o
CFLAGS_fortify_kunit.o += $(call cc-disable-warning, unsequenced)
CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-overread)
CFLAGS_fortify_kunit.o += $(call cc-disable-warning, stringop-truncation)