linux-kernel - [PATCH] crypto: aegis: add header for internal prototypes

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Date:   Tue, 16 May 2023 22:28:48 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: aegis: add header for internal prototypes

From: Arnd Bergmann <arnd@...db.de>

gcc warns if prototypes are only visible to the caller but
not the callee:

crypto/aegis128-neon-inner.c:134:6: warning: no previous prototype for 'crypto_aegis128_init_neon' [-Wmissing-prototypes]
crypto/aegis128-neon-inner.c:164:6: warning: no previous prototype for 'crypto_aegis128_update_neon' [-Wmissing-prototypes]
crypto/aegis128-neon-inner.c:221:6: warning: no previous prototype for 'crypto_aegis128_encrypt_chunk_neon' [-Wmissing-prototypes]
crypto/aegis128-neon-inner.c:270:6: warning: no previous prototype for 'crypto_aegis128_decrypt_chunk_neon' [-Wmissing-prototypes]
crypto/aegis128-neon-inner.c:316:5: warning: no previous prototype for 'crypto_aegis128_final_neon' [-Wmissing-prototypes]

The prototypes cannot be in the regular aegis.h, as the inner neon code
cannot include normal kernel headers. Instead add a new header just for
the functions provided by this file.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 crypto/aegis-neon.h          | 17 +++++++++++++++++
 crypto/aegis128-neon-inner.c |  1 +
 crypto/aegis128-neon.c       | 12 +-----------
 3 files changed, 19 insertions(+), 11 deletions(-)
 create mode 100644 crypto/aegis-neon.h

diff --git a/crypto/aegis-neon.h b/crypto/aegis-neon.h
new file mode 100644
index 000000000000..61e5614b45de
--- /dev/null
+++ b/crypto/aegis-neon.h
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#ifndef _AEGIS_NEON_H
+#define _AEGIS_NEON_H
+
+void crypto_aegis128_init_neon(void *state, const void *key, const void *iv);
+void crypto_aegis128_update_neon(void *state, const void *msg);
+void crypto_aegis128_encrypt_chunk_neon(void *state, void *dst, const void *src,
+					unsigned int size);
+void crypto_aegis128_decrypt_chunk_neon(void *state, void *dst, const void *src,
+					unsigned int size);
+int crypto_aegis128_final_neon(void *state, void *tag_xor,
+			       unsigned int assoclen,
+			       unsigned int cryptlen,
+			       unsigned int authsize);
+
+#endif
diff --git a/crypto/aegis128-neon-inner.c b/crypto/aegis128-neon-inner.c
index 7de485907d81..b6a52a386b22 100644
--- a/crypto/aegis128-neon-inner.c
+++ b/crypto/aegis128-neon-inner.c
@@ -16,6 +16,7 @@
 #define AEGIS_BLOCK_SIZE	16
 
 #include <stddef.h>
+#include "aegis-neon.h"
 
 extern int aegis128_have_aes_insn;
 
diff --git a/crypto/aegis128-neon.c b/crypto/aegis128-neon.c
index a7856915ec85..9ee50549e823 100644
--- a/crypto/aegis128-neon.c
+++ b/crypto/aegis128-neon.c
@@ -7,17 +7,7 @@
 #include <asm/neon.h>
 
 #include "aegis.h"
-
-void crypto_aegis128_init_neon(void *state, const void *key, const void *iv);
-void crypto_aegis128_update_neon(void *state, const void *msg);
-void crypto_aegis128_encrypt_chunk_neon(void *state, void *dst, const void *src,
-					unsigned int size);
-void crypto_aegis128_decrypt_chunk_neon(void *state, void *dst, const void *src,
-					unsigned int size);
-int crypto_aegis128_final_neon(void *state, void *tag_xor,
-			       unsigned int assoclen,
-			       unsigned int cryptlen,
-			       unsigned int authsize);
+#include "aegis-neon.h"
 
 int aegis128_have_aes_insn __ro_after_init;
 
-- 
2.39.2