diff options
Diffstat (limited to 'arch/s390/include/asm/archrandom.h')
| -rw-r--r-- | arch/s390/include/asm/archrandom.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/include/asm/archrandom.h b/arch/s390/include/asm/archrandom.h index de61ce562052..5dc712fde3c7 100644 --- a/arch/s390/include/asm/archrandom.h +++ b/arch/s390/include/asm/archrandom.h @@ -2,7 +2,7 @@ /* * Kernel interface for the s390 arch_random_* functions * - * Copyright IBM Corp. 2017 + * Copyright IBM Corp. 2017, 2020 * * Author: Harald Freudenberger <freude@de.ibm.com> * @@ -19,10 +19,13 @@ DECLARE_STATIC_KEY_FALSE(s390_arch_random_available); extern atomic64_t s390_arch_random_counter; +bool s390_arch_get_random_long(unsigned long *v); bool s390_arch_random_generate(u8 *buf, unsigned int nbytes); static inline bool __must_check arch_get_random_long(unsigned long *v) { + if (static_branch_likely(&s390_arch_random_available)) + return s390_arch_get_random_long(v); return false; } |