diff --git a/drivers/char/random.c b/drivers/char/random.c
index bbce1f6242d8..8f3c41e7fec0 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -109,7 +109,7 @@ bool rng_is_initialized(void)
 }
 EXPORT_SYMBOL(rng_is_initialized);
 
-static void crng_set_ready(struct work_struct *work)
+static void __cold crng_set_ready(struct work_struct *work)
 {
 	static_branch_enable(&crng_is_ready);
 }
@@ -148,7 +148,7 @@ EXPORT_SYMBOL(wait_for_random_bytes);
  * returns: 0 if callback is successfully added
  *	    -EALREADY if pool is already initialised (callback not called)
  */
-int register_random_ready_notifier(struct notifier_block *nb)
+int __cold register_random_ready_notifier(struct notifier_block *nb)
 {
 	unsigned long flags;
 	int ret = -EALREADY;
@@ -167,7 +167,7 @@ EXPORT_SYMBOL(register_random_ready_notifier);
 /*
  * Delete a previously registered readiness callback function.
  */
-int unregister_random_ready_notifier(struct notifier_block *nb)
+int __cold unregister_random_ready_notifier(struct notifier_block *nb)
 {
 	unsigned long flags;
 	int ret;
@@ -179,7 +179,7 @@ int unregister_random_ready_notifier(struct notifier_block *nb)
 }
 EXPORT_SYMBOL(unregister_random_ready_notifier);
 
-static void process_random_ready_list(void)
+static void __cold process_random_ready_list(void)
 {
 	unsigned long flags;
 
@@ -189,15 +189,9 @@ static void process_random_ready_list(void)
 }
 
 #define warn_unseeded_randomness() \
-	_warn_unseeded_randomness(__func__, (void *)_RET_IP_)
-
-static void _warn_unseeded_randomness(const char *func_name, void *caller)
-{
-	if (!IS_ENABLED(CONFIG_WARN_ALL_UNSEEDED_RANDOM) || crng_ready())
-		return;
-	printk_deferred(KERN_NOTICE "random: %s called from %pS with crng_init=%d\n",
-			func_name, caller, crng_init);
-}
+	if (IS_ENABLED(CONFIG_WARN_ALL_UNSEEDED_RANDOM) && !crng_ready()) \
+		printk_deferred(KERN_NOTICE "random: %s called from %pS with crng_init=%d\n", \
+				__func__, (void *)_RET_IP_, crng_init)
 
 
 /*********************************************************************
@@ -611,7 +605,7 @@ EXPORT_SYMBOL(get_random_u32);
  * This function is called when the CPU is coming up, with entry
  * CPUHP_RANDOM_PREPARE, which comes before CPUHP_WORKQUEUE_PREP.
  */
-int random_prepare_cpu(unsigned int cpu)
+int __cold random_prepare_cpu(unsigned int cpu)
 {
 	/*
 	 * When the cpu comes back online, immediately invalidate both
@@ -786,13 +780,15 @@ static void extract_entropy(void *buf, size_t len)
 	memzero_explicit(&block, sizeof(block));
 }
 
-static void credit_init_bits(size_t bits)
+#define credit_init_bits(bits) if (!crng_ready()) _credit_init_bits(bits)
+
+static void __cold _credit_init_bits(size_t bits)
 {
 	static struct execute_work set_ready;
 	unsigned int new, orig, add;
 	unsigned long flags;
 
-	if (crng_ready() || !bits)
+	if (!bits)
 		return;
 
 	add = min_t(size_t, bits, POOL_BITS);
@@ -971,7 +967,7 @@ EXPORT_SYMBOL_GPL(add_hwgenerator_randomness);
  * Handle random seed passed by bootloader, and credit it if
  * CONFIG_RANDOM_TRUST_BOOTLOADER is set.
  */
-void add_bootloader_randomness(const void *buf, size_t len)
+void __cold add_bootloader_randomness(const void *buf, size_t len)
 {
 	mix_pool_bytes(buf, len);
 	if (trust_bootloader)
@@ -1017,7 +1013,7 @@ static void fast_mix(unsigned long s[4], unsigned long v1, unsigned long v2)
  * This function is called when the CPU has just come online, with
  * entry CPUHP_AP_RANDOM_ONLINE, just after CPUHP_AP_WORKQUEUE_ONLINE.
  */
-int random_online_cpu(unsigned int cpu)
+int __cold random_online_cpu(unsigned int cpu)
 {
 	/*
 	 * During CPU shutdown and before CPU onlining, add_interrupt_
@@ -1172,7 +1168,7 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned int nu
 	if (in_irq())
 		this_cpu_ptr(&irq_randomness)->count += max(1u, bits * 64) - 1;
 	else
-		credit_init_bits(bits);
+		_credit_init_bits(bits);
 }
 
 void add_input_randomness(unsigned int type, unsigned int code, unsigned int value)
@@ -1200,7 +1196,7 @@ void add_disk_randomness(struct gendisk *disk)
 }
 EXPORT_SYMBOL_GPL(add_disk_randomness);
 
-void rand_initialize_disk(struct gendisk *disk)
+void __cold rand_initialize_disk(struct gendisk *disk)
 {
 	struct timer_rand_state *state;
 
@@ -1229,7 +1225,7 @@ void rand_initialize_disk(struct gendisk *disk)
  *
  * So the re-arming always happens in the entropy loop itself.
  */
-static void entropy_timer(struct timer_list *t)
+static void __cold entropy_timer(struct timer_list *t)
 {
 	credit_init_bits(1);
 }
@@ -1238,7 +1234,7 @@ static void entropy_timer(struct timer_list *t)
  * If we have an actual cycle counter, see if we can
  * generate enough entropy with timing noise
  */
-static void try_to_generate_entropy(void)
+static void __cold try_to_generate_entropy(void)
 {
 	struct {
 		unsigned long entropy;