linux-kernel - [PATCH 3/8] random: trigger random_ready callback upon crng

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Message-ID: <3576149.HSfW5KObBF@positron.chronox.de>
Date:   Tue, 27 Dec 2016 23:39:57 +0100
From:   Stephan Müller <smueller@...onox.de>
To:     Ted Tso <tytso@....edu>
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: [PATCH 3/8] random: trigger random_ready callback upon crng_init == 1

The random_ready callback mechanism is intended to replicate the
getrandom system call behavior to in-kernel users. As the getrandom
system call unblocks with crng_init == 1, trigger the random_ready
wakeup call at the same time.

Signed-off-by: Stephan Mueller <smueller@...onox.de>
---
 drivers/char/random.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 482531d..5c26b1c 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -810,6 +810,7 @@ static int crng_fast_load(const char *cp, size_t len)
 	}
 	if (crng_init_cnt >= CRNG_INIT_CNT_THRESH) {
 		crng_init = 1;
+		process_random_ready_list();
 		wake_up_interruptible(&crng_init_wait);
 		pr_notice("random: fast init done\n");
 	}
-- 
2.9.3