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1b6c89285d
Previously, missing time namespace support in the vDSO meant that time namespaces needed to be disabled globally. This was expressed in a hard dependency on the generic vDSO library. This also meant that architectures without any vDSO or only a stub vDSO could not enable time namespaces. Now that all architectures using a real vDSO are using the generic library, that dependency is not necessary anymore. Remove the dependency and let all architectures enable time namespaces. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20260326-vdso-timens-decoupling-v2-2-c82693a7775f@linutronix.de
29 lines
728 B
C
29 lines
728 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TIME_NAMESPACE_INTERNAL_H
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#define _TIME_NAMESPACE_INTERNAL_H
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#include <linux/mutex.h>
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struct time_namespace;
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/*
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* Protects possibly multiple offsets writers racing each other
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* and tasks entering the namespace.
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*/
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extern struct mutex timens_offset_lock;
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#ifdef CONFIG_TIME_NS_VDSO
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int timens_vdso_alloc_vvar_page(struct time_namespace *ns);
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void timens_vdso_free_vvar_page(struct time_namespace *ns);
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#else /* !CONFIG_TIME_NS_VDSO */
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static inline int timens_vdso_alloc_vvar_page(struct time_namespace *ns)
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{
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return 0;
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}
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static inline void timens_vdso_free_vvar_page(struct time_namespace *ns)
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{
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}
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#endif /* CONFIG_TIME_NS_VDSO */
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#endif /* _TIME_NAMESPACE_INTERNAL_H */
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