linux-stable.git/kernel/time/namespace_internal.h, branch master Linux kernel stable tree timens: Remove dependency on the vDSO 2026-03-26T14:44:23+00:00 Thomas Weißschuh thomas.weissschuh@linutronix.de 2026-03-26T11:42:31+00:00 1b6c89285d37114d7efe8ab04102a542581cd7da 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 
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
vdso/timens: Move functions to new file 2026-03-26T14:44:22+00:00 Thomas Weißschuh thomas.weissschuh@linutronix.de 2026-03-26T11:42:30+00:00 5dc9cf835aba73c882348aa4f99be83b6e45ad9b As a preparation of the untangling of time namespaces and the vDSO, move the glue functions between those subsystems into a new file. While at it, switch the mutex lock and mmap_read_lock() in the vDSO namespace code to guard(). 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-v2-1-c82693a7775f@linutronix.de 
As a preparation of the untangling of time namespaces and the vDSO, move
the glue functions between those subsystems into a new file.

While at it, switch the mutex lock and mmap_read_lock() in the vDSO
namespace code to guard().

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-v2-1-c82693a7775f@linutronix.de