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_CURRENT_H 11 #define __ASM_CURRENT_H 12 13 #include <linux/bug.h> 14 #include <linux/compiler.h> 15 16 #ifndef __ASSEMBLY__ 17 18 struct task_struct; 19 20 /* 21 * This only works because "struct thread_info" is at offset 0 from "struct 22 * task_struct". This constraint seems to be necessary on other architectures 23 * as well, but __switch_to enforces it. We can't check TASK_TI here because 24 * <asm/asm-offsets.h> includes this, and I can't get the definition of "struct 25 * task_struct" here due to some header ordering problems. 26 */ 27 static __always_inline struct task_struct *get_current(void) 28 { 29 register struct task_struct *tp __asm__("tp"); 30 return tp; 31 } 32 33 #define current get_current() 34 35 #endif /* __ASSEMBLY__ */ 36 37 #endif /* __ASM_CURRENT_H */ 38