kernel: move crypto-arc4 into a module

It is no longer required by wireless drivers, so we can save some space here

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/kernel/linux/modules/crypto.mk

@@ -46,6 +46,17 @@ endef
 $(eval $(call KernelPackage,crypto-aead))
 
 
+define KernelPackage/crypto-arc4
+  TITLE:=ARC4 cipher CryptoAPI module
+  KCONFIG:=CONFIG_CRYPTO_ARC4
+  FILES:=$(LINUX_DIR)/crypto/arc4.ko
+  AUTOLOAD:=$(call AutoLoad,09,arc4)
+  $(call AddDepends/crypto)
+endef
+
+$(eval $(call KernelPackage,crypto-arc4))
+
+
 define KernelPackage/crypto-authenc
   TITLE:=Combined mode wrapper for IPsec
   DEPENDS:=+kmod-crypto-manager +kmod-crypto-null

package/kernel/linux/modules/fs.mk

@@ -98,6 +98,7 @@ define KernelPackage/fs-cifs
   AUTOLOAD:=$(call AutoLoad,30,cifs)
   $(call AddDepends/nls)
   DEPENDS+= \
+    +kmod-crypto-arc4 \
     +kmod-crypto-hmac \
     +kmod-crypto-md5 \
     +kmod-crypto-md4 \

package/kernel/linux/modules/netsupport.mk

@@ -733,7 +733,7 @@ $(eval $(call KernelPackage,ipoa))
 define KernelPackage/mppe
   SUBMENU:=$(NETWORK_SUPPORT_MENU)
   TITLE:=Microsoft PPP compression/encryption
-  DEPENDS:=kmod-ppp +kmod-crypto-sha1 +kmod-crypto-ecb
+  DEPENDS:=kmod-ppp +kmod-crypto-arc4 +kmod-crypto-sha1 +kmod-crypto-ecb
   KCONFIG:= \
 	CONFIG_PPP_MPPE_MPPC \
 	CONFIG_PPP_MPPE

target/linux/generic/config-4.14

@@ -882,7 +882,7 @@ CONFIG_CRYPTO_ALGAPI=y
 CONFIG_CRYPTO_ALGAPI2=y
 # CONFIG_CRYPTO_ANSI_CPRNG is not set
 # CONFIG_CRYPTO_ANUBIS is not set
-CONFIG_CRYPTO_ARC4=y
+# CONFIG_CRYPTO_ARC4 is not set
 # CONFIG_CRYPTO_AUTHENC is not set
 CONFIG_CRYPTO_BLKCIPHER=y
 CONFIG_CRYPTO_BLKCIPHER2=y

target/linux/generic/config-4.19

@@ -926,7 +926,7 @@ CONFIG_CRYPTO_ALGAPI=y
 CONFIG_CRYPTO_ALGAPI2=y
 # CONFIG_CRYPTO_ANSI_CPRNG is not set
 # CONFIG_CRYPTO_ANUBIS is not set
-CONFIG_CRYPTO_ARC4=y
+# CONFIG_CRYPTO_ARC4 is not set
 # CONFIG_CRYPTO_AUTHENC is not set
 CONFIG_CRYPTO_BLKCIPHER=y
 CONFIG_CRYPTO_BLKCIPHER2=y

target/linux/generic/config-4.9

@@ -822,7 +822,7 @@ CONFIG_CRYPTO_ALGAPI=y
 CONFIG_CRYPTO_ALGAPI2=y
 # CONFIG_CRYPTO_ANSI_CPRNG is not set
 # CONFIG_CRYPTO_ANUBIS is not set
-CONFIG_CRYPTO_ARC4=y
+# CONFIG_CRYPTO_ARC4 is not set
 # CONFIG_CRYPTO_AUTHENC is not set
 CONFIG_CRYPTO_BLKCIPHER=y
 CONFIG_CRYPTO_BLKCIPHER2=y