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2026-10-04selftests/filesystems: check that reading the root of an empty mount ↵Christian Brauner
namespace stalls nobody A readdir of the root of an empty mount namespace stuck in the page fault of its buffer must stall neither a create nor a lookup in that directory. The test needs userfaultfd and skips without it. Link: https://patch.msgid.link/20261002-work-mount-fixes-4-v1-21-dd44b89d44ce@kernel.org Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>