rust: time: make Delta::ZERO generic over the time unit

Delta::ZERO is defined only for Delta<Nsec>, so code that needs a zero
Delta<Jiffy> has to write Delta::from_jiffies(0).

Define ZERO for every Delta<U> instead. An integer literal cannot be
used for a generic U::Repr, so add ZERO to TimeUnit.

Suggested-by: Markus Probst <markus.probst@posteo.de>
Suggested-by: Gary Guo <gary@garyguo.net>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Acked-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20261002050428.2746277-2-tomo@flapping.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

0 files changed, 0 insertions, 0 deletions