lib/crc: remove CONFIG_LIBCRC32C

Now that LIBCRC32C does nothing besides select CRC32, make every option
that selects LIBCRC32C instead select CRC32 directly.  Then remove
LIBCRC32C.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250401221600.24878-8-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>

20 files changed, 20 insertions, 28 deletions

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index a97f2c40c640..2551ebf88dda 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -367,7 +367,7 @@ config BLK_DEV_RBD
 	tristate "Rados block device (RBD)"
 	depends on INET && BLOCK
 	select CEPH_LIB
-	select LIBCRC32C
+	select CRC32
 	select CRYPTO_AES
 	select CRYPTO
 	help
diff --git a/drivers/block/drbd/Kconfig b/drivers/block/drbd/Kconfig
index 6fb4e38fca88..495a72da04c6 100644
--- a/drivers/block/drbd/Kconfig
+++ b/drivers/block/drbd/Kconfig
@@ -10,7 +10,7 @@ config BLK_DEV_DRBD
 	tristate "DRBD Distributed Replicated Block Device support"
 	depends on PROC_FS && INET
 	select LRU_CACHE
-	select LIBCRC32C
+	select CRC32
 	help
 
 	  NOTE: In order to authenticate connections you have to select
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 0b1870a09e1f..2c26a02391cd 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -139,7 +139,7 @@ config MD_RAID456
 	tristate "RAID-4/RAID-5/RAID-6 mode"
 	depends on BLK_DEV_MD
 	select RAID6_PQ
-	select LIBCRC32C
+	select CRC32
 	select ASYNC_MEMCPY
 	select ASYNC_XOR
 	select ASYNC_PQ
diff --git a/drivers/md/persistent-data/Kconfig b/drivers/md/persistent-data/Kconfig
index f4f948b0e173..dbb97a7233ab 100644
--- a/drivers/md/persistent-data/Kconfig
+++ b/drivers/md/persistent-data/Kconfig
@@ -2,7 +2,7 @@
 config DM_PERSISTENT_DATA
        tristate
        depends on BLK_DEV_DM
-       select LIBCRC32C
+       select CRC32
        select DM_BUFIO
 	help
 	 Library providing immutable on-disk data structure support for
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig
index eeec8bf17cf4..1bd4313215d7 100644
--- a/drivers/net/ethernet/broadcom/Kconfig
+++ b/drivers/net/ethernet/broadcom/Kconfig
@@ -143,7 +143,7 @@ config BNX2X
 	depends on PTP_1588_CLOCK_OPTIONAL
 	select FW_LOADER
 	select ZLIB_INFLATE
-	select LIBCRC32C
+	select CRC32
 	select MDIO
 	help
 	  This driver supports Broadcom NetXtremeII 10 gigabit Ethernet cards.
@@ -207,7 +207,7 @@ config BNXT
 	depends on PCI
 	depends on PTP_1588_CLOCK_OPTIONAL
 	select FW_LOADER
-	select LIBCRC32C
+	select CRC32
 	select NET_DEVLINK
 	select PAGE_POOL
 	select DIMLIB
diff --git a/drivers/net/ethernet/cavium/Kconfig b/drivers/net/ethernet/cavium/Kconfig
index ca742cc146d7..7dae5aad3689 100644
--- a/drivers/net/ethernet/cavium/Kconfig
+++ b/drivers/net/ethernet/cavium/Kconfig
@@ -70,8 +70,8 @@ config LIQUIDIO
 	depends on 64BIT && PCI
 	depends on PCI
 	depends on PTP_1588_CLOCK_OPTIONAL
+	select CRC32
 	select FW_LOADER
-	select LIBCRC32C
 	select LIQUIDIO_CORE
 	select NET_DEVLINK
 	help
diff --git a/fs/bcachefs/Kconfig b/fs/bcachefs/Kconfig
index c9798750202d..ea668dedb260 100644
--- a/fs/bcachefs/Kconfig
+++ b/fs/bcachefs/Kconfig
@@ -4,7 +4,7 @@ config BCACHEFS_FS
 	depends on BLOCK
 	select EXPORTFS
 	select CLOSURES
-	select LIBCRC32C
+	select CRC32
 	select CRC64
 	select FS_POSIX_ACL
 	select LZ4_COMPRESS
diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
index fa8515598341..73a2dfb854c5 100644
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@@ -3,9 +3,9 @@
 config BTRFS_FS
 	tristate "Btrfs filesystem support"
 	select BLK_CGROUP_PUNT_BIO
+	select CRC32
 	select CRYPTO
 	select CRYPTO_CRC32C
-	select LIBCRC32C
 	select CRYPTO_XXHASH
 	select CRYPTO_SHA256
 	select CRYPTO_BLAKE2B
diff --git a/fs/ceph/Kconfig b/fs/ceph/Kconfig
index 7249d70e1a43..3e7def3d31c1 100644
--- a/fs/ceph/Kconfig
+++ b/fs/ceph/Kconfig
@@ -3,7 +3,7 @@ config CEPH_FS
 	tristate "Ceph distributed file system"
 	depends on INET
 	select CEPH_LIB
-	select LIBCRC32C
+	select CRC32
 	select CRYPTO_AES
 	select CRYPTO
 	select NETFS_SUPPORT
diff --git a/fs/erofs/Kconfig b/fs/erofs/Kconfig
index 331e49cd1b8d..8f68ec49ad89 100644
--- a/fs/erofs/Kconfig
+++ b/fs/erofs/Kconfig
@@ -3,8 +3,8 @@
 config EROFS_FS
 	tristate "EROFS filesystem support"
 	depends on BLOCK
+	select CRC32
 	select FS_IOMAP
-	select LIBCRC32C
 	help
 	  EROFS (Enhanced Read-Only File System) is a lightweight read-only
 	  file system with modern designs (e.g. no buffer heads, inline
diff --git a/fs/gfs2/Kconfig b/fs/gfs2/Kconfig
index be7f87a8e11a..7bd231d16d4a 100644
--- a/fs/gfs2/Kconfig
+++ b/fs/gfs2/Kconfig
@@ -4,7 +4,6 @@ config GFS2_FS
 	select BUFFER_HEAD
 	select FS_POSIX_ACL
 	select CRC32
-	select LIBCRC32C
 	select QUOTACTL
 	select FS_IOMAP
 	help
diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index fffd6fffdce0..ae0ca6858496 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -3,7 +3,7 @@ config XFS_FS
 	tristate "XFS filesystem support"
 	depends on BLOCK
 	select EXPORTFS
-	select LIBCRC32C
+	select CRC32
 	select FS_IOMAP
 	help
 	  XFS is a high performance journaling filesystem which originated
diff --git a/lib/Kconfig b/lib/Kconfig
index 4e796eaea2f4..6c1b8f184267 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -208,13 +208,6 @@ config CRC7
 	  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
diff --git a/net/batman-adv/Kconfig b/net/batman-adv/Kconfig
index 860a0786bc1e..20b316207f9a 100644
--- a/net/batman-adv/Kconfig
+++ b/net/batman-adv/Kconfig
@@ -9,7 +9,7 @@
 
 config BATMAN_ADV
 	tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
-	select LIBCRC32C
+	select CRC32
 	help
 	  B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is
 	  a routing protocol for multi-hop ad-hoc mesh networks. The
diff --git a/net/ceph/Kconfig b/net/ceph/Kconfig
index c5c4eef3a9ff..0aa21fcbf6ec 100644
--- a/net/ceph/Kconfig
+++ b/net/ceph/Kconfig
@@ -2,7 +2,7 @@
 config CEPH_LIB
 	tristate "Ceph core library"
 	depends on INET
-	select LIBCRC32C
+	select CRC32
 	select CRYPTO_AES
 	select CRYPTO_CBC
 	select CRYPTO_GCM
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index df2dc21304ef..047ba81865ed 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -212,7 +212,7 @@ config NF_CT_PROTO_SCTP
 	bool 'SCTP protocol connection tracking support'
 	depends on NETFILTER_ADVANCED
 	default y
-	select LIBCRC32C
+	select CRC32
 	help
 	  With this option enabled, the layer 3 independent connection
 	  tracking code will be able to do state tracking on SCTP connections.
@@ -475,7 +475,7 @@ endif # NF_CONNTRACK
 
 config NF_TABLES
 	select NETFILTER_NETLINK
-	select LIBCRC32C
+	select CRC32
 	tristate "Netfilter nf_tables support"
 	help
 	  nftables is the new packet classification framework that intends to
diff --git a/net/netfilter/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig
index 2a3017b9c001..8c5b1fe12d07 100644
--- a/net/netfilter/ipvs/Kconfig
+++ b/net/netfilter/ipvs/Kconfig
@@ -105,7 +105,7 @@ config	IP_VS_PROTO_AH
 
 config  IP_VS_PROTO_SCTP
 	bool "SCTP load balancing support"
-	select LIBCRC32C
+	select CRC32
 	help
 	  This option enables support for load balancing SCTP transport
 	  protocol. Say Y if unsure.
diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig
index 2535f3f9f462..5481bd561eb4 100644
--- a/net/openvswitch/Kconfig
+++ b/net/openvswitch/Kconfig
@@ -11,7 +11,7 @@ config OPENVSWITCH
 				     (!NF_NAT || NF_NAT) && \
 				     (!NETFILTER_CONNCOUNT || NETFILTER_CONNCOUNT)))
 	depends on PSAMPLE || !PSAMPLE
-	select LIBCRC32C
+	select CRC32
 	select MPLS
 	select NET_MPLS_GSO
 	select DST_CACHE
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 8180d0c12fce..a800127effcd 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -784,7 +784,7 @@ config NET_ACT_SKBEDIT
 config NET_ACT_CSUM
 	tristate "Checksum Updating"
 	depends on NET_CLS_ACT && INET
-	select LIBCRC32C
+	select CRC32
 	help
 	  Say Y here to update some common checksum after some direct
 	  packet alterations.
diff --git a/net/sctp/Kconfig b/net/sctp/Kconfig
index 5da599ff84a9..d18a72df3654 100644
--- a/net/sctp/Kconfig
+++ b/net/sctp/Kconfig
@@ -7,10 +7,10 @@ menuconfig IP_SCTP
 	tristate "The SCTP Protocol"
 	depends on INET
 	depends on IPV6 || IPV6=n
+	select CRC32
 	select CRYPTO
 	select CRYPTO_HMAC
 	select CRYPTO_SHA1
-	select LIBCRC32C
 	select NET_UDP_TUNNEL
 	help
 	  Stream Control Transmission Protocol