1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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2 | #ifndef _ASM_X86_CURRENT_H |
3 | #define _ASM_X86_CURRENT_H |
4 | |
5 | #include <linux/compiler.h> |
6 | |
7 | #ifndef __ASSEMBLY__ |
8 | |
9 | #include <linux/cache.h> |
10 | #include <asm/percpu.h> |
11 | |
12 | struct task_struct; |
13 | |
14 | struct pcpu_hot { |
15 | union { |
16 | struct { |
17 | struct task_struct *current_task; |
18 | int preempt_count; |
19 | int cpu_number; |
20 | #ifdef CONFIG_CALL_DEPTH_TRACKING |
21 | u64 call_depth; |
22 | #endif |
23 | unsigned long top_of_stack; |
24 | void *hardirq_stack_ptr; |
25 | u16 softirq_pending; |
26 | #ifdef CONFIG_X86_64 |
27 | bool hardirq_stack_inuse; |
28 | #else |
29 | void *softirq_stack_ptr; |
30 | #endif |
31 | }; |
32 | u8 pad[64]; |
33 | }; |
34 | }; |
35 | static_assert(sizeof(struct pcpu_hot) == 64); |
36 | |
37 | DECLARE_PER_CPU_ALIGNED(struct pcpu_hot, pcpu_hot); |
38 | |
39 | static __always_inline struct task_struct *get_current(void) |
40 | { |
41 | return this_cpu_read_stable(pcpu_hot.current_task); |
42 | } |
43 | |
44 | #define current get_current() |
45 | |
46 | #endif /* __ASSEMBLY__ */ |
47 | |
48 | #endif /* _ASM_X86_CURRENT_H */ |
49 |