3 commits

Author	SHA1	Message	Date
Gary Guo	79d3d667af	rust: sync: Add helpers for mb, dma_mb and friends ... They supplement the existing smp_mb, smp_rmb and smp_wmb. Reviewed-by: Eliot Courtney <ecourtney@nvidia.com> Signed-off-by: Gary Guo <gary@garyguo.net> Signed-off-by: Boqun Feng <boqun@kernel.org> Link: https://patch.msgid.link/20260609-rust-barrier-v2-1-30fcc48e1cd0@garyguo.net	2026-08-04 05:52:54 -07:00
Alice Ryhl	aa574e0f21	rust: barrier: Add __rust_helper to helpers ... This is needed to inline these helpers into Rust code. Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Gary Guo <gary@garyguo.net> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20260105-define-rust-helper-v2-1-51da5f454a67@google.com	2026-01-09 19:01:41 +08:00
Boqun Feng	d9ea5a41ce	rust: sync: Add memory barriers ... Memory barriers are building blocks for concurrent code, hence provide a minimal set of them. The compiler barrier, barrier(), is implemented in inline asm instead of using core::sync::atomic::compiler_fence() because memory models are different: kernel's atomics are implemented in inline asm therefore the compiler barrier should be implemented in inline asm as well. Also it's currently only public to the kernel crate until there's a reasonable driver usage. 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: Elle Rhumsaa <elle@weathered-steel.dev> Link: https://lore.kernel.org/all/20250719030827.61357-10-boqun.feng@gmail.com/	2025-09-15 09:38:34 +02:00