linux-kernel - [PATCH 3/3] random: Remove kernel blocking API

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Message-Id: <E1Z2GdC-0002nC-Br@gondolin.me.apana.org.au>
Date:	Tue, 09 Jun 2015 18:19:42 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>, Ted Tso <tytso@....edu>,
	andreas.steffen@...ongswan.org, sandyinchina@...il.com,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] random: Remove kernel blocking API

This patch removes the kernel blocking API as it has been completely
replaced by the callback API.

Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
---

 drivers/char/random.c  |   12 ------------
 include/linux/random.h |    1 -
 2 files changed, 13 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index a1576ed..d0da5d8 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1265,18 +1265,6 @@ void get_random_bytes(void *buf, int nbytes)
 EXPORT_SYMBOL(get_random_bytes);
 
 /*
- * Equivalent function to get_random_bytes with the difference that this
- * function blocks the request until the nonblocking_pool is initialized.
- */
-void get_blocking_random_bytes(void *buf, int nbytes)
-{
-	if (unlikely(nonblocking_pool.initialized == 0))
-		wait_event(urandom_init_wait, nonblocking_pool.initialized);
-	extract_entropy(&nonblocking_pool, buf, nbytes, 0, 0);
-}
-EXPORT_SYMBOL(get_blocking_random_bytes);
-
-/*
  * Add a callback function that will be invoked when the nonblocking
  * pool is initialised.
  *
diff --git a/include/linux/random.h b/include/linux/random.h
index 30e2aca..e651874 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -21,7 +21,6 @@ extern void add_input_randomness(unsigned int type, unsigned int code,
 extern void add_interrupt_randomness(int irq, int irq_flags);
 
 extern void get_random_bytes(void *buf, int nbytes);
-extern void get_blocking_random_bytes(void *buf, int nbytes);
 extern int add_random_ready_callback(struct random_ready_callback *rdy);
 extern void del_random_ready_callback(struct random_ready_callback *rdy);
 extern void get_random_bytes_arch(void *buf, int nbytes);
--
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