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Boqun Feng
bec2fa23ea
[ Upstream commit4a5dc632e0] Originally, `Atomic::from_ptr()` requires `T` being a `Sync` because I thought having the ability to do `from_ptr()` meant multiplle `&Atomic<T>`s shared by different threads, which was identical (or similar) to multiple `&T`s shared by different threads. Hence `T` was required to be `Sync`. However this is not true, since `&Atomic<T>` is not the same at `&T`. Moreover, having this bound makes `Atomic::<*mut T>::from_ptr()` impossible, which is definitely not intended. Therefore remove the `T: Sync` bound. [boqun: Fix title typo spotted by Alice & Gary] Fixes:29c32c405e("rust: sync: atomic: Add generic atomics") Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Link: https://patch.msgid.link/20260120115207.55318-2-boqun.feng@gmail.com Link: https://patch.msgid.link/20260303201701.12204-2-boqun@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>