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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) 2013 Huawei Ltd.
- * Author: Jiang Liu <liuj97@gmail.com>
- *
- * Based on arch/arm/kernel/jump_label.c
- */
- #include <linux/kernel.h>
- #include <linux/jump_label.h>
- #include <asm/insn.h>
- void arch_jump_label_transform(struct jump_entry *entry,
- enum jump_label_type type)
- {
- void *addr = (void *)jump_entry_code(entry);
- u32 insn;
- if (type == JUMP_LABEL_JMP) {
- insn = aarch64_insn_gen_branch_imm(jump_entry_code(entry),
- jump_entry_target(entry),
- AARCH64_INSN_BRANCH_NOLINK);
- } else {
- insn = aarch64_insn_gen_nop();
- }
- aarch64_insn_patch_text_nosync(addr, insn);
- }
- void arch_jump_label_transform_static(struct jump_entry *entry,
- enum jump_label_type type)
- {
- /*
- * We use the architected A64 NOP in arch_static_branch, so there's no
- * need to patch an identical A64 NOP over the top of it here. The core
- * will call arch_jump_label_transform from a module notifier if the
- * NOP needs to be replaced by a branch.
- */
- }
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