diff --git a/drivers/char/random.c b/drivers/char/random.c
index 53cfc98256ce..d1a3b203ef87 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -289,12 +289,14 @@
 enum poolinfo {
 	POOL_BITS = BLAKE2S_HASH_SIZE * 8,
 	POOL_BITSHIFT = ilog2(POOL_BITS),
+	POOL_MIN_BITS = POOL_BITS / 2,
 
 	/* To allow fractional bits to be tracked, the entropy_count field is
 	 * denominated in units of 1/8th bits. */
 	POOL_ENTROPY_SHIFT = 3,
 #define POOL_ENTROPY_BITS() (input_pool.entropy_count >> POOL_ENTROPY_SHIFT)
-	POOL_FRACBITS = POOL_BITS << POOL_ENTROPY_SHIFT
+	POOL_FRACBITS = POOL_BITS << POOL_ENTROPY_SHIFT,
+	POOL_MIN_FRACBITS = POOL_MIN_BITS << POOL_ENTROPY_SHIFT
 };
 
 /*
@@ -375,8 +377,7 @@ static struct {
 	.lock = __SPIN_LOCK_UNLOCKED(input_pool.lock),
 };
 
-static bool extract_entropy(void *buf, size_t nbytes, int min);
-static void _extract_entropy(void *buf, size_t nbytes);
+static void extract_entropy(void *buf, size_t nbytes);
 
 static void crng_reseed(struct crng_state *crng, bool use_input_pool);
 
@@ -467,7 +468,7 @@ static void process_random_ready_list(void)
  */
 static void credit_entropy_bits(int nbits)
 {
-	int entropy_count, entropy_bits, orig;
+	int entropy_count, orig;
 	int nfrac = nbits << POOL_ENTROPY_SHIFT;
 
 	/* Ensure that the multiplication can avoid being 64 bits wide. */
@@ -527,8 +528,7 @@ static void credit_entropy_bits(int nbits)
 
 	trace_credit_entropy_bits(nbits, entropy_count >> POOL_ENTROPY_SHIFT, _RET_IP_);
 
-	entropy_bits = entropy_count >> POOL_ENTROPY_SHIFT;
-	if (crng_init < 2 && entropy_bits >= 128)
+	if (crng_init < 2 && entropy_count >= POOL_MIN_FRACBITS)
 		crng_reseed(&primary_crng, true);
 }
 
@@ -618,7 +618,7 @@ static void crng_initialize_secondary(struct crng_state *crng)
 
 static void __init crng_initialize_primary(void)
 {
-	_extract_entropy(&primary_crng.state[4], sizeof(u32) * 12);
+	extract_entropy(&primary_crng.state[4], sizeof(u32) * 12);
 	if (crng_init_try_arch_early() && trust_cpu && crng_init < 2) {
 		invalidate_batched_entropy();
 		numa_crng_init();
@@ -788,8 +788,17 @@ static void crng_reseed(struct crng_state *crng, bool use_input_pool)
 	} buf;
 
 	if (use_input_pool) {
-		if (!extract_entropy(&buf, 32, 16))
-			return;
+		int entropy_count;
+		do {
+			entropy_count = READ_ONCE(input_pool.entropy_count);
+			if (entropy_count < POOL_MIN_FRACBITS)
+				return;
+		} while (cmpxchg(&input_pool.entropy_count, entropy_count, 0) != entropy_count);
+		extract_entropy(buf.key, sizeof(buf.key));
+		if (random_write_wakeup_bits) {
+			wake_up_interruptible(&random_write_wait);
+			kill_fasync(&fasync, SIGIO, POLL_OUT);
+		}
 	} else {
 		_extract_crng(&primary_crng, buf.block);
 		_crng_backtrack_protect(&primary_crng, buf.block,
@@ -1114,52 +1123,11 @@ EXPORT_SYMBOL_GPL(add_disk_randomness);
  *
  *********************************************************************/
 
-/*
- * This function decides how many bytes to actually take from the
- * given pool, and also debits the entropy count accordingly.
- */
-static size_t account(size_t nbytes, int min)
-{
-	int entropy_count, orig;
-	size_t ibytes, nfrac;
-
-	BUG_ON(input_pool.entropy_count > POOL_FRACBITS);
-
-	/* Can we pull enough? */
-retry:
-	entropy_count = orig = READ_ONCE(input_pool.entropy_count);
-	if (WARN_ON(entropy_count < 0)) {
-		pr_warn("negative entropy count: count %d\n", entropy_count);
-		entropy_count = 0;
-	}
-
-	/* never pull more than available */
-	ibytes = min_t(size_t, nbytes, entropy_count >> (POOL_ENTROPY_SHIFT + 3));
-	if (ibytes < min)
-		ibytes = 0;
-	nfrac = ibytes << (POOL_ENTROPY_SHIFT + 3);
-	if ((size_t)entropy_count > nfrac)
-		entropy_count -= nfrac;
-	else
-		entropy_count = 0;
-
-	if (cmpxchg(&input_pool.entropy_count, orig, entropy_count) != orig)
-		goto retry;
-
-	trace_debit_entropy(8 * ibytes);
-	if (ibytes && POOL_ENTROPY_BITS() < random_write_wakeup_bits) {
-		wake_up_interruptible(&random_write_wait);
-		kill_fasync(&fasync, SIGIO, POLL_OUT);
-	}
-
-	return ibytes;
-}
-
 /*
  * This is an HKDF-like construction for using the hashed collected entropy
  * as a PRF key, that's then expanded block-by-block.
  */
-static void _extract_entropy(void *buf, size_t nbytes)
+static void extract_entropy(void *buf, size_t nbytes)
 {
 	unsigned long flags;
 	u8 seed[BLAKE2S_HASH_SIZE], next_key[BLAKE2S_HASH_SIZE];
@@ -1169,6 +1137,8 @@ static void _extract_entropy(void *buf, size_t nbytes)
 	} block;
 	size_t i;
 
+	trace_extract_entropy(nbytes, POOL_ENTROPY_BITS());
+
 	for (i = 0; i < ARRAY_SIZE(block.rdrand); ++i) {
 		if (!arch_get_random_long(&block.rdrand[i]))
 			block.rdrand[i] = random_get_entropy();
@@ -1200,25 +1170,6 @@ static void _extract_entropy(void *buf, size_t nbytes)
 	memzero_explicit(&block, sizeof(block));
 }
 
-/*
- * This function extracts randomness from the "entropy pool", and
- * returns it in a buffer.
- *
- * The min parameter specifies the minimum amount we can pull before
- * failing to avoid races that defeat catastrophic reseeding. If we
- * have less than min entropy available, we return false and buf is
- * not filled.
- */
-static bool extract_entropy(void *buf, size_t nbytes, int min)
-{
-	trace_extract_entropy(nbytes, POOL_ENTROPY_BITS(), _RET_IP_);
-	if (account(nbytes, min)) {
-		_extract_entropy(buf, nbytes);
-		return true;
-	}
-	return false;
-}
-
 #define warn_unseeded_randomness(previous) \
 	_warn_unseeded_randomness(__func__, (void *)_RET_IP_, (previous))
 
diff --git a/include/trace/events/random.h b/include/trace/events/random.h
index a2d9aa16a5d7..ad149aeaf42c 100644
--- a/include/trace/events/random.h
+++ b/include/trace/events/random.h
@@ -79,22 +79,6 @@ TRACE_EVENT(credit_entropy_bits,
 		  __entry->bits, __entry->entropy_count, (void *)__entry->IP)
 );
 
-TRACE_EVENT(debit_entropy,
-	TP_PROTO(int debit_bits),
-
-	TP_ARGS( debit_bits),
-
-	TP_STRUCT__entry(
-		__field(	  int,	debit_bits		)
-	),
-
-	TP_fast_assign(
-		__entry->debit_bits	= debit_bits;
-	),
-
-	TP_printk("input pool: debit_bits %d", __entry->debit_bits)
-);
-
 TRACE_EVENT(add_input_randomness,
 	TP_PROTO(int input_bits),
 
@@ -161,31 +145,29 @@ DEFINE_EVENT(random__get_random_bytes, get_random_bytes_arch,
 );
 
 DECLARE_EVENT_CLASS(random__extract_entropy,
-	TP_PROTO(int nbytes, int entropy_count, unsigned long IP),
+	TP_PROTO(int nbytes, int entropy_count),
 
-	TP_ARGS(nbytes, entropy_count, IP),
+	TP_ARGS(nbytes, entropy_count),
 
 	TP_STRUCT__entry(
 		__field(	  int,	nbytes			)
 		__field(	  int,	entropy_count		)
-		__field(unsigned long,	IP			)
 	),
 
 	TP_fast_assign(
 		__entry->nbytes		= nbytes;
 		__entry->entropy_count	= entropy_count;
-		__entry->IP		= IP;
 	),
 
-	TP_printk("input pool: nbytes %d entropy_count %d caller %pS",
-		  __entry->nbytes, __entry->entropy_count, (void *)__entry->IP)
+	TP_printk("input pool: nbytes %d entropy_count %d",
+		  __entry->nbytes, __entry->entropy_count)
 );
 
 
 DEFINE_EVENT(random__extract_entropy, extract_entropy,
-	TP_PROTO(int nbytes, int entropy_count, unsigned long IP),
+	TP_PROTO(int nbytes, int entropy_count),
 
-	TP_ARGS(nbytes, entropy_count, IP)
+	TP_ARGS(nbytes, entropy_count)
 );
 
 TRACE_EVENT(urandom_read,
