current.h (1001B)
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 36register unsigned long current_stack_pointer __asm__("sp"); 37 38#endif /* __ASSEMBLY__ */ 39 40#endif /* _ASM_RISCV_CURRENT_H */