threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
58 lines
1.3 KiB
C
58 lines
1.3 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, 2022
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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/preempt.h>
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#include <linux/atomic.h>
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#include <asm/cpacf.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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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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in_task()) {
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cpacf_trng(NULL, 0, (u8 *)v, sizeof(*v));
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atomic64_add(sizeof(*v), &s390_arch_random_counter);
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return true;
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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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in_task()) {
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cpacf_trng(NULL, 0, (u8 *)v, sizeof(*v));
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atomic64_add(sizeof(*v), &s390_arch_random_counter);
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return true;
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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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