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| 2 | |
| 3 | * Based on arm/arm64/include/asm/current.h
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| 4 | *
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| 5 | * Copyright (C) 2016 ARM
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| 6 | * Copyright (C) 2017 SiFive
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| 7 |
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| 8 |
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| 9 |
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| 10 | #ifndef _ASM_RISCV_CURRENT_H
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| 11 | #define _ASM_RISCV_CURRENT_H
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| 12 |
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| 13 | #include <linux/bug.h>
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| 14 | #include <linux/compiler.h>
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| 15 |
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| 16 | #ifndef __ASSEMBLER__
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| 17 |
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| 18 | struct task_struct;
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| 19 |
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| 20 | register struct task_struct *riscv_current_is_tp __asm__("tp");
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| 21 |
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| 22 | |
| 23 | * This only works because "struct thread_info" is at offset 0 from "struct
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| 24 | * task_struct". This constraint seems to be necessary on other architectures
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| 25 | * as well, but __switch_to enforces it. We can't check TASK_TI here because
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| 26 | * <asm/asm-offsets.h> includes this, and I can't get the definition of "struct
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| 27 | * task_struct" here due to some header ordering problems.
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| 28 |
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| 29 | static __always_inline struct task_struct *get_current(void)
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| 30 | {
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| 31 | return riscv_current_is_tp;
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| 32 | }
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| 33 |
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| 34 | #define current get_current()
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| 35 |
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| 36 | register unsigned long current_stack_pointer __asm__("sp");
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| 37 |
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| 38 | #endif
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| 39 |
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| 40 | #endif
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