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 18 struct task_struct; 19 20 register 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 */ 29 static __always_inline struct task_struct *get_current(void) 30 { 31 return riscv_current_is_tp; 32 } 33 34 #define current get_current() 35 36 register unsigned long current_stack_pointer __asm__("sp"); 37 38 #endif /* __ASSEMBLY__ */ 39 40 #endif /* _ASM_RISCV_CURRENT_H */ 41