diff options
Diffstat (limited to 'kernel/time/namespace_internal.h')
| -rw-r--r-- | kernel/time/namespace_internal.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/kernel/time/namespace_internal.h b/kernel/time/namespace_internal.h new file mode 100644 index 000000000000..b37ba179f43b --- /dev/null +++ b/kernel/time/namespace_internal.h @@ -0,0 +1,28 @@ +/* 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 */ |