5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Kernel interface for the s390 arch_random_* functions
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*
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* Copyright IBM Corp. 2017
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*
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* Author: Harald Freudenberger <freude@de.ibm.com>
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*
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*/
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#ifndef _ASM_S390_ARCHRANDOM_H
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#define _ASM_S390_ARCHRANDOM_H
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#ifdef CONFIG_ARCH_RANDOM
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#include <linux/static_key.h>
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#include <linux/atomic.h>
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DECLARE_STATIC_KEY_FALSE(s390_arch_random_available);
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extern atomic64_t s390_arch_random_counter;
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bool s390_arch_random_generate(u8 *buf, unsigned int nbytes);
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static inline bool __must_check arch_get_random_long(unsigned long *v)
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{
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return false;
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}
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static inline bool __must_check arch_get_random_int(unsigned int *v)
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{
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return false;
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}
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static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
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{
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if (static_branch_likely(&s390_arch_random_available)) {
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return s390_arch_random_generate((u8 *)v, sizeof(*v));
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}
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return false;
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}
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static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
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{
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if (static_branch_likely(&s390_arch_random_available)) {
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return s390_arch_random_generate((u8 *)v, sizeof(*v));
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}
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return false;
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}
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#endif /* CONFIG_ARCH_RANDOM */
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#endif /* _ASM_S390_ARCHRANDOM_H */
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