[PATCH 02/21] x86: crypto: convert exported crypto symbol into pluggable interface for CONFIG_CRYPTO_TWOFISH_X86_64 crypto

[Jay Wang <wanjay@amazon.com>]

Apply Crypto API wrappers to the exported crypto symbol in
CONFIG_CRYPTO_TWOFISH_X86_64-related crypto to convert them into pluggable
interface.

Signed-off-by: Jay Wang <wanjay@amazon.com>
---
 arch/x86/crypto/Makefile              |  2 +-
 arch/x86/crypto/fips140/fips140-api.c | 11 +++++++++++
 arch/x86/crypto/twofish.h             |  9 +++++++--
 arch/x86/crypto/twofish_glue.c        |  4 ++--
 4 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile
index 27010cb2326c..ed8958bffbc9 100644
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -4,7 +4,7 @@
 
 obj-$(CONFIG_CRYPTO_TWOFISH_586) += twofish-i586.o
 twofish-i586-y := twofish-i586-asm_32.o twofish_glue.o
-obj-$(CONFIG_CRYPTO_TWOFISH_X86_64) += twofish-x86_64.o
+crypto-objs-$(CONFIG_CRYPTO_TWOFISH_X86_64) += twofish-x86_64.o
 twofish-x86_64-y := twofish-x86_64-asm_64.o twofish_glue.o
 obj-$(CONFIG_CRYPTO_TWOFISH_X86_64_3WAY) += twofish-x86_64-3way.o
 twofish-x86_64-3way-y := twofish-x86_64-asm_64-3way.o twofish_glue_3way.o
diff --git a/arch/x86/crypto/fips140/fips140-api.c b/arch/x86/crypto/fips140/fips140-api.c
index e69de29bb2d1..bb8ca949caef 100644
--- a/arch/x86/crypto/fips140/fips140-api.c
+++ b/arch/x86/crypto/fips140/fips140-api.c
@@ -0,0 +1,11 @@
+/*
+ * arch/x86/crypto/twofish_glue.c
+ */
+#if IS_BUILTIN(CONFIG_CRYPTO_TWOFISH_X86_64)
+
+#include <arch/x86/crypto/twofish.h>
+
+DEFINE_CRYPTO_API_STUB(twofish_enc_blk);
+DEFINE_CRYPTO_API_STUB(twofish_dec_blk);
+
+#endif
\ No newline at end of file
diff --git a/arch/x86/crypto/twofish.h b/arch/x86/crypto/twofish.h
index 12df400e6d53..c44d2f53ee11 100644
--- a/arch/x86/crypto/twofish.h
+++ b/arch/x86/crypto/twofish.h
@@ -2,13 +2,18 @@
 #ifndef ASM_X86_TWOFISH_H
 #define ASM_X86_TWOFISH_H
 
+#include <crypto/api.h>
 #include <linux/crypto.h>
 #include <crypto/twofish.h>
 #include <crypto/b128ops.h>
 
 /* regular block cipher functions from twofish_x86_64 module */
-asmlinkage void twofish_enc_blk(const void *ctx, u8 *dst, const u8 *src);
-asmlinkage void twofish_dec_blk(const void *ctx, u8 *dst, const u8 *src);
+DECLARE_CRYPTO_API(CONFIG_CRYPTO_TWOFISH_X86_64, twofish_enc_blk, asmlinkage void,
+	(const void *ctx, u8 *dst, const u8 *src),
+	(ctx, dst, src));
+DECLARE_CRYPTO_API(CONFIG_CRYPTO_TWOFISH_X86_64, twofish_dec_blk, asmlinkage void,
+	(const void *ctx, u8 *dst, const u8 *src),
+	(ctx, dst, src));
 
 /* 3-way parallel cipher functions */
 asmlinkage void __twofish_enc_blk_3way(const void *ctx, u8 *dst, const u8 *src,
diff --git a/arch/x86/crypto/twofish_glue.c b/arch/x86/crypto/twofish_glue.c
index 8e9906d36902..8787a1d2cec4 100644
--- a/arch/x86/crypto/twofish_glue.c
+++ b/arch/x86/crypto/twofish_glue.c
@@ -91,8 +91,8 @@ static void __exit twofish_glue_fini(void)
 	crypto_unregister_alg(&alg);
 }
 
-module_init(twofish_glue_init);
-module_exit(twofish_glue_fini);
+crypto_module_init(twofish_glue_init);
+crypto_module_exit(twofish_glue_fini);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION ("Twofish Cipher Algorithm, asm optimized");
-- 
2.47.3