linux-ext4 - [PATCH v3 1/8] random: Don't wake crng_init_wait when crng

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Message-Id: <6fbc0bfcbfc1fa2c76fd574f5b6f552b11be7fde.1577088521.git.luto@kernel.org>
Date:   Mon, 23 Dec 2019 00:20:44 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     Ted Ts'o <tytso@....edu>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        "Ahmed S. Darwish" <darwish.07@...il.com>,
        Lennart Poettering <mzxreary@...inter.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Alexander E. Patrakov" <patrakov@...il.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Willy Tarreau <w@....eu>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        linux-man <linux-man@...r.kernel.org>,
        Stephan Mueller <smueller@...onox.de>,
        Andy Lutomirski <luto@...nel.org>
Subject: [PATCH v3 1/8] random: Don't wake crng_init_wait when crng_init == 1

crng_init_wait is only used to wayt for crng_init to be set to 2, so
there's no point to waking it when crng_init is set to 1.  Remove the
unnecessary wake_up_interruptible() call.

Signed-off-by: Andy Lutomirski <luto@...nel.org>
---
 drivers/char/random.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index cda12933a17d..c6252a3a4aec 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -946,7 +946,6 @@ static int crng_fast_load(const char *cp, size_t len)
 	if (crng_init_cnt >= CRNG_INIT_CNT_THRESH) {
 		invalidate_batched_entropy();
 		crng_init = 1;
-		wake_up_interruptible(&crng_init_wait);
 		pr_notice("random: fast init done\n");
 	}
 	return 1;
-- 
2.23.0