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@gondor.apana.org.au>

Author: herbertx

drivers/char/random.c

@@ -1264,18 +1264,6 @@ 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.

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);