[PATCH] crypto: sun8i-ce: rename kfree() to kfree_sensitive()

[Yang Li]

Rename kfree() to kfree_sensitive() to  make the intention of the API
more explicit.

fixed the following coccicheck:
./drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c:30:16-17: WARNING
opportunity for kfree_sensitive/kvfree_sensitive (memset at line 29)
./drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c:42:16-17: WARNING
opportunity for kfree_sensitive/kvfree_sensitive (memset at line 41)
./drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c:161:8-9: WARNING
opportunity for kfree_sensitive/kvfree_sensitive (memset at line 109)

Reported-by: Abaci Robot <ab...@linux.alibaba.com>
Signed-off-by: Yang Li <yang....@linux.alibaba.com>
---
 drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c 
b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c
index cfde9ee..8259d52 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-prng.c
@@ -27,7 +27,7 @@ void sun8i_ce_prng_exit(struct crypto_tfm *tfm)
        struct sun8i_ce_rng_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
 
        memzero_explicit(ctx->seed, ctx->slen);
-       kfree(ctx->seed);
+       kfree_sensitive(ctx->seed);
        ctx->seed = NULL;
        ctx->slen = 0;
 }
@@ -39,7 +39,7 @@ int sun8i_ce_prng_seed(struct crypto_rng *tfm, const u8 *seed,
 
        if (ctx->seed && ctx->slen != slen) {
                memzero_explicit(ctx->seed, ctx->slen);
-               kfree(ctx->seed);
+               kfree_sensitive(ctx->seed);
                ctx->slen = 0;
                ctx->seed = NULL;
        }
@@ -158,7 +158,7 @@ int sun8i_ce_prng_generate(struct crypto_rng *tfm, const u8 
*src,
        }
        memzero_explicit(d, todo);
 err_iv:
-       kfree(d);
+       kfree_sensitive(d);
 err_mem:
        return err;
 }
-- 
1.8.3.1