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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 17 Nov 2025 10:07:57 +0000 Oliver Mangold wrote: > `AlwaysRefCounted` will become a marker trait to indicate that it is > allowed to obtain an `ARef` from a `&T`, which cannot be allowed for > types which are also Ownable. The message needs a rationale for making the change rather than relying on the reader to deduce so. For example: There are types where it may both be referenced counted in some cases and owned in other. In such cases, obtaining `ARef` from `&T` would be unsound as it allows creation of `ARef` copy from `&Owned`. Therefore, we split `AlwaysRefCounted` into `RefCounted` (which `ARef` would require) and a marker trait to indicate that the type is always reference counted (and not `Ownable`) so the `&T` -> `ARef` conversion is possible. Best, Gary > > Signed-off-by: Oliver Mangold > Co-developed-by: Andreas Hindborg > Signed-off-by: Andreas Hindborg > Suggested-by: Alice Ryhl > --- > rust/kernel/auxiliary.rs | 7 +++++- > rust/kernel/block/mq/request.rs | 15 +++++++------ > rust/kernel/cred.rs | 13 ++++++++++-- > rust/kernel/device.rs | 13 ++++++++---- > rust/kernel/device/property.rs | 7 +++++- > rust/kernel/drm/device.rs | 10 ++++++--- > rust/kernel/drm/gem/mod.rs | 10 ++++++--- > rust/kernel/fs/file.rs | 16 ++++++++++---- > rust/kernel/mm.rs | 15 +++++++++---- > rust/kernel/mm/mmput_async.rs | 9 ++++++-- > rust/kernel/opp.rs | 10 ++++++--- > rust/kernel/owned.rs | 2 +- > rust/kernel/pci.rs | 10 ++++++--- > rust/kernel/pid_namespace.rs | 12 +++++++++-- > rust/kernel/platform.rs | 7 +++++- > rust/kernel/sync/aref.rs | 47 ++++++++++++++++++++++++++--------------- > rust/kernel/task.rs | 10 ++++++--- > rust/kernel/types.rs | 2 +- > 18 files changed, 154 insertions(+), 61 deletions(-)