rust: helpers: Add i8/i16 atomic xchg_acquire helpers

Add i8/i16 atomic xchg_acquire helpers that call xchg_acquire() macro
implementing atomic xchg_acquire using architecture-specific
instructions.

[boqun: Use xchg_acquire() instead of raw_xchg_acquire()]

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://patch.msgid.link/20251223062140.938325-3-fujita.tomonori@gmail.com

diff --git a/rust/helpers/atomic_ext.c b/rust/helpers/atomic_ext.c
index 3136255a84c6eb5e247bded99060db421fb1c25d..177bb3603e5f4eb29edb30fbeee97754575f00a7 100644 (file)
--- a/rust/helpers/atomic_ext.c
+++ b/rust/helpers/atomic_ext.c
@@ -60,3 +60,13 @@ __rust_helper s16 rust_helper_atomic_i16_xchg(s16 *ptr, s16 new)
 {
        return xchg(ptr, new);
 }
+
+__rust_helper s8 rust_helper_atomic_i8_xchg_acquire(s8 *ptr, s8 new)
+{
+       return xchg_acquire(ptr, new);
+}
+
+__rust_helper s16 rust_helper_atomic_i16_xchg_acquire(s16 *ptr, s16 new)
+{
+       return xchg_acquire(ptr, new);
+}