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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Based on arm/arm64/include/asm/current.h
4 *
5 * Copyright (C) 2016 ARM
6 * Copyright (C) 2017 SiFive
7 */
8
9
10#ifndef _ASM_RISCV_CURRENT_H
11#define _ASM_RISCV_CURRENT_H
12
13#include <linux/bug.h>
14#include <linux/compiler.h>
15
16#ifndef __ASSEMBLY__
17
18struct task_struct;
19
20register struct task_struct *riscv_current_is_tp __asm__("tp");
21
22/*
23 * This only works because "struct thread_info" is at offset 0 from "struct
24 * task_struct". This constraint seems to be necessary on other architectures
25 * as well, but __switch_to enforces it. We can't check TASK_TI here because
26 * <asm/asm-offsets.h> includes this, and I can't get the definition of "struct
27 * task_struct" here due to some header ordering problems.
28 */
29static __always_inline struct task_struct *get_current(void)
30{
31 return riscv_current_is_tp;
32}
33
34#define current get_current()
35
36#endif /* __ASSEMBLY__ */
37
38#endif /* _ASM_RISCV_CURRENT_H */