2 Commits

Include renames

Author	SHA1	Message	Date
Gary Guo	a307bf1db5	rust: block: convert block::mq to use Refcount ... Currently there's a custom reference counting in `block::mq`, which uses `AtomicU64` Rust atomics, and this type doesn't exist on some 32-bit architectures. We cannot just change it to use 32-bit atomics, because doing so will make it vulnerable to refcount overflow. So switch it to use the kernel refcount `kernel::sync::Refcount` instead. There is an operation needed by `block::mq`, atomically decreasing refcount from 2 to 0, which is not available through refcount.h, so I exposed `Refcount::as_atomic` which allows accessing the refcount directly. [boqun: Adopt the LKMM atomic API] Signed-off-by: Gary Guo <[email protected]> Signed-off-by: Boqun Feng <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Benno Lossin <[email protected]> Reviewed-by: Elle Rhumsaa <[email protected]> Acked-by: Andreas Hindborg <[email protected]> Tested-by: David Gow <[email protected]> Link: https://lore.kernel.org/r/[email protected]	2025-09-15 09:38:36 +02:00
Gary Guo	bb38f35b35	rust: implement kernel::sync::Refcount ... This is a wrapping layer of `include/linux/refcount.h`. Currently the kernel refcount has already been used in `Arc`, however it calls into FFI directly. [boqun: Add the missing <> for the link in comment] Signed-off-by: Gary Guo <[email protected]> Signed-off-by: Boqun Feng <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Alice Ryhl <[email protected]> Reviewed-by: Boqun Feng <[email protected]> Reviewed-by: Fiona Behrens <[email protected]> Reviewed-by: Benno Lossin <[email protected]> Reviewed-by: Elle Rhumsaa <[email protected]> Link: https://lore.kernel.org/r/[email protected]	2025-09-15 09:38:35 +02:00