diff --git a/drivers/char/random.c b/drivers/char/random.c
index e77c9233c50b..550cf8894ee6 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -445,7 +445,7 @@ static void _get_random_bytes(void *buf, size_t len)
  * wait_for_random_bytes() should be called and return 0 at least once
  * at any point prior.
  */
-void get_random_bytes(void *buf, size_t len)
+void get_random_bytes(void *buf, int len)
 {
 	warn_unseeded_randomness();
 	_get_random_bytes(buf, len);
@@ -589,7 +589,7 @@ int __cold random_prepare_cpu(unsigned int cpu)
  * use. Use get_random_bytes() instead. It returns the number of
  * bytes filled in.
  */
-size_t __must_check get_random_bytes_arch(void *buf, size_t len)
+int __must_check get_random_bytes_arch(void *buf, int len)
 {
 	size_t left = len;
 	u8 *p = buf;
@@ -864,7 +864,7 @@ int __init random_init(const char *command_line)
  * the entropy pool having similar initial state across largely
  * identical devices.
  */
-void add_device_randomness(const void *buf, size_t len)
+void add_device_randomness(const void *buf, unsigned int len)
 {
 	unsigned long entropy = random_get_entropy();
 	unsigned long flags;
diff --git a/include/linux/random.h b/include/linux/random.h
index 5d04058c494c..9246d87767fd 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -12,7 +12,7 @@
 
 struct notifier_block;
 
-void add_device_randomness(const void *buf, size_t len);
+void add_device_randomness(const void *buf, unsigned int len);
 void add_bootloader_randomness(const void *buf, size_t len);
 void add_input_randomness(unsigned int type, unsigned int code,
 			  unsigned int value) __latent_entropy;
@@ -28,8 +28,8 @@ static inline void add_latent_entropy(void)
 static inline void add_latent_entropy(void) { }
 #endif
 
-void get_random_bytes(void *buf, size_t len);
-size_t __must_check get_random_bytes_arch(void *buf, size_t len);
+void get_random_bytes(void *buf, int len);
+int __must_check get_random_bytes_arch(void *buf, int len);
 u32 get_random_u32(void);
 u64 get_random_u64(void);
 static inline unsigned int get_random_int(void)