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Add atomic operation support for i8 and i16 types using volatile read/write and smp_load_acquire/smp_store_release helpers. [boqun: Adjust [1] to avoid introduction of impl_atomic_only_load_and_store_ops!() in the middle] Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com> Link: https://lore.kernel.org/all/20251228120546.1602275-1-fujita.tomonori@gmail.com/ [1] Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20251211113826.1299077-4-fujita.tomonori@gmail.com