crypto: chacha - constify ctx and iv arguments

Constify the ctx and iv arguments to crypto_chacha_init() and the
various chacha*_stream_xor() functions.  This makes it clear that they
are not modified.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 2 insertions, 2 deletions

diff --git a/crypto/chacha_generic.c b/crypto/chacha_generic.c
index d2ec04997832..d283bd3bdb60 100644
--- a/crypto/chacha_generic.c
+++ b/crypto/chacha_generic.c
@@ -36,7 +36,7 @@ static void chacha_docrypt(u32 *state, u8 *dst, const u8 *src,
 }
 
 static int chacha_stream_xor(struct skcipher_request *req,
-                             struct chacha_ctx *ctx, u8 *iv)
+                             const struct chacha_ctx *ctx, const u8 *iv)
 {
         struct skcipher_walk walk;
         u32 state[16];
@@ -60,7 +60,7 @@ static int chacha_stream_xor(struct skcipher_request *req,
         return err;
 }
 
-void crypto_chacha_init(u32 *state, struct chacha_ctx *ctx, u8 *iv)
+void crypto_chacha_init(u32 *state, const struct chacha_ctx *ctx, const u8 *iv)
 {
         state[0]  = 0x61707865; /* "expa" */
         state[1]  = 0x3320646e; /* "nd 3" */