blob: f153c77853de1867d060a95242357b390a294fb1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_CURRENT_H
#define _ASM_X86_CURRENT_H
#include <linux/build_bug.h>
#include <linux/compiler.h>
#ifndef __ASSEMBLY__
#include <linux/cache.h>
#include <asm/percpu.h>
struct task_struct;
struct pcpu_hot {
struct task_struct *current_task;
unsigned long top_of_stack;
void *hardirq_stack_ptr;
#ifdef CONFIG_X86_64
bool hardirq_stack_inuse;
#else
void *softirq_stack_ptr;
#endif
};
DECLARE_PER_CPU_CACHE_HOT(struct pcpu_hot, pcpu_hot);
/* const-qualified alias to pcpu_hot, aliased by linker. */
DECLARE_PER_CPU_CACHE_HOT(const struct pcpu_hot __percpu_seg_override,
const_pcpu_hot);
static __always_inline struct task_struct *get_current(void)
{
if (IS_ENABLED(CONFIG_USE_X86_SEG_SUPPORT))
return this_cpu_read_const(const_pcpu_hot.current_task);
return this_cpu_read_stable(pcpu_hot.current_task);
}
#define current get_current()
#endif /* __ASSEMBLY__ */
#endif /* _ASM_X86_CURRENT_H */
|
