linux-kernel - [PATCH] random: get rid of dead codes from credit_entropy

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Date:   Sun, 28 Jun 2020 19:23:04 +0800
From:   Li RongQing <lirongqing@...du.com>
To:     tytso@....edu, arnd@...db.de, linux-kernel@...r.kernel.org
Subject: [PATCH] random: get rid of dead codes from credit_entropy_bits

After commit 90ea1c6436d2 ("random: remove the blocking pool"),
has_initialized is zero always, and initialized of struct
entropy_store is not used

Signed-off-by: Li RongQing <lirongqing@...du.com>
---
 drivers/char/random.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index a7cf6aa65908..288cc4464a69 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -500,7 +500,6 @@ struct entropy_store {
 	unsigned short add_ptr;
 	unsigned short input_rotate;
 	int entropy_count;
-	unsigned int initialized:1;
 	unsigned int last_data_init:1;
 	__u8 last_data[EXTRACT_SIZE];
 };
@@ -660,7 +659,7 @@ static void process_random_ready_list(void)
  */
 static void credit_entropy_bits(struct entropy_store *r, int nbits)
 {
-	int entropy_count, orig, has_initialized = 0;
+	int entropy_count, orig;
 	const int pool_size = r->poolinfo->poolfracbits;
 	int nfrac = nbits << ENTROPY_SHIFT;
 
@@ -717,11 +716,6 @@ static void credit_entropy_bits(struct entropy_store *r, int nbits)
 	if (cmpxchg(&r->entropy_count, orig, entropy_count) != orig)
 		goto retry;
 
-	if (has_initialized) {
-		r->initialized = 1;
-		kill_fasync(&fasync, SIGIO, POLL_IN);
-	}
-
 	trace_credit_entropy_bits(r->name, nbits,
 				  entropy_count >> ENTROPY_SHIFT, _RET_IP_);
 
-- 
2.16.2