Now that crypto_default_rng, crypto_get_default_rng(), and
crypto_put_default_rng() have no users outside crypto/rng.c itself,
unexport them and make them static.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
---
 crypto/rng.c         | 9 +++------
 include/crypto/rng.h | 5 -----
 2 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/crypto/rng.c b/crypto/rng.c
index 53a268ad5104..f52f4793f9ea 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -22,12 +22,11 @@
 #include <net/netlink.h>
 
 #include "internal.h"
 
 static DEFINE_MUTEX(crypto_default_rng_lock);
-struct crypto_rng *crypto_default_rng;
-EXPORT_SYMBOL_GPL(crypto_default_rng);
+static struct crypto_rng *crypto_default_rng;
 static int crypto_default_rng_refcnt;
 
 int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen)
 {
 	u8 *buf = NULL;
@@ -104,11 +103,11 @@ struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask)
 {
 	return crypto_alloc_tfm(alg_name, &crypto_rng_type, type, mask);
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_rng);
 
-int crypto_get_default_rng(void)
+static int crypto_get_default_rng(void)
 {
 	struct crypto_rng *rng;
 	int err;
 
 	mutex_lock(&crypto_default_rng_lock);
@@ -133,19 +132,17 @@ int crypto_get_default_rng(void)
 unlock:
 	mutex_unlock(&crypto_default_rng_lock);
 
 	return err;
 }
-EXPORT_SYMBOL_GPL(crypto_get_default_rng);
 
-void crypto_put_default_rng(void)
+static void crypto_put_default_rng(void)
 {
 	mutex_lock(&crypto_default_rng_lock);
 	crypto_default_rng_refcnt--;
 	mutex_unlock(&crypto_default_rng_lock);
 }
-EXPORT_SYMBOL_GPL(crypto_put_default_rng);
 
 int crypto_stdrng_get_bytes(void *buf, unsigned int len)
 {
 	int err;
 
diff --git a/include/crypto/rng.h b/include/crypto/rng.h
index db6c3962a7df..f61e037afed9 100644
--- a/include/crypto/rng.h
+++ b/include/crypto/rng.h
@@ -55,15 +55,10 @@ struct rng_alg {
 
 struct crypto_rng {
 	struct crypto_tfm base;
 };
 
-extern struct crypto_rng *crypto_default_rng;
-
-int crypto_get_default_rng(void);
-void crypto_put_default_rng(void);
-
 /**
  * crypto_stdrng_get_bytes() - get cryptographically secure random bytes
  * @buf: output buffer holding the random numbers
  * @len: length of the output buffer
  *
-- 
2.53.0