| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _TIME_NAMESPACE_INTERNAL_H |
| #define _TIME_NAMESPACE_INTERNAL_H |
| |
| #include <linux/mutex.h> |
| |
| struct time_namespace; |
| |
| /* |
| * Protects possibly multiple offsets writers racing each other |
| * and tasks entering the namespace. |
| */ |
| extern struct mutex timens_offset_lock; |
| |
| #ifdef CONFIG_TIME_NS_VDSO |
| int timens_vdso_alloc_vvar_page(struct time_namespace *ns); |
| void timens_vdso_free_vvar_page(struct time_namespace *ns); |
| #else /* !CONFIG_TIME_NS_VDSO */ |
| static inline int timens_vdso_alloc_vvar_page(struct time_namespace *ns) |
| { |
| return 0; |
| } |
| static inline void timens_vdso_free_vvar_page(struct time_namespace *ns) |
| { |
| } |
| #endif /* CONFIG_TIME_NS_VDSO */ |
| |
| #endif /* _TIME_NAMESPACE_INTERNAL_H */ |
