current.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_CURRENT_H
 3#define _ASM_X86_CURRENT_H
 4
 5#include <linux/build_bug.h>
 6#include <linux/compiler.h>
 7
 8#ifndef __ASSEMBLER__
 9
10#include <linux/cache.h>
11#include <asm/percpu.h>
12
13struct task_struct;
14
15DECLARE_PER_CPU_CACHE_HOT(struct task_struct *, current_task);
16/* const-qualified alias provided by the linker. */
17DECLARE_PER_CPU_CACHE_HOT(struct task_struct * const __percpu_seg_override,
18			  const_current_task);
19
20static __always_inline struct task_struct *get_current(void)
21{
22	if (IS_ENABLED(CONFIG_USE_X86_SEG_SUPPORT))
23		return this_cpu_read_const(const_current_task);
24
25	return this_cpu_read_stable(current_task);
26}
27
28#define current get_current()
29
30#endif /* __ASSEMBLER__ */
31
32#endif /* _ASM_X86_CURRENT_H */