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Message-ID: <20250401221600.24878-7-ebiggers@kernel.org>
Date: Tue, 1 Apr 2025 15:15:59 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Ard Biesheuvel <ardb@...nel.org>,
linux-crypto@...r.kernel.org,
linux-arch@...r.kernel.org
Subject: [PATCH 6/7] lib/crc: document all the CRC library kconfig options
From: Eric Biggers <ebiggers@...gle.com>
Previous commits removed all the original CRC kconfig help text, since
it was oriented towards people configuring the kernel, and the options
are no longer user-selectable. However, it's still useful for there to
be help text for kernel developers. Add this.
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
lib/Kconfig | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/lib/Kconfig b/lib/Kconfig
index 89470bb24519..4e796eaea2f4 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -138,63 +138,90 @@ config TRACE_MMIO_ACCESS
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 LIBCRC32C
tristate
select CRC32
help
This option just selects CRC32 and is provided for compatibility
purposes until the users are updated to select CRC32 directly.
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
--
2.49.0
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