devtmpfs: create private mount namespace

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Kernel threads start in a completely isolated nullfs mount. Use
UNSHARE_EMPTY_MNTNS to give the devtmpfsd kthread a private empty mount
namespace with its root and pwd already set up, so it can mount its own
devtmpfs instance instead of unsharing a copy of the initial mount
namespace.

Link: https://patch.msgid.link/20260601-work-kthread-nullfs-v4-21-77ee053060e0@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

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Christian Brauner 2026-06-01 15:56:54 +02:00

parent ed4b167252

commit 66d2faeccb

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drivers/base/devtmpfs.c

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