arch/s390/crypto/arch_random.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * s390 arch random implementation.
   4  *
   5  * Copyright IBM Corp. 2017, 2020
   6  * Author(s): Harald Freudenberger
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/atomic.h>
  11 #include <linux/random.h>
  12 #include <linux/static_key.h>
  13 #include <asm/archrandom.h>
  14 #include <asm/cpacf.h>
  15
  16 DEFINE_STATIC_KEY_FALSE(s390_arch_random_available);
  17
  18 atomic64_t s390_arch_random_counter = ATOMIC64_INIT(0);
  19 EXPORT_SYMBOL(s390_arch_random_counter);