| 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 | |
| 13 | struct task_struct; |
| 14 | |
| 15 | DECLARE_PER_CPU_CACHE_HOT(struct task_struct *, current_task); |
| 16 | /* const-qualified alias provided by the linker. */ |
| 17 | DECLARE_PER_CPU_CACHE_HOT(struct task_struct * const __percpu_seg_override, |
| 18 | const_current_task); |
| 19 | |
| 20 | static __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 */ |
| 33 |