tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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

authored by

FUJITA Tomonori and committed by
Boqun Feng ab717dd9 5dbc0a69

+10
+10
rust/helpers/atomic_ext.c
··· 60 60 { 61 61 return xchg(ptr, new); 62 62 } 63 + 64 + __rust_helper s8 rust_helper_atomic_i8_xchg_acquire(s8 *ptr, s8 new) 65 + { 66 + return xchg_acquire(ptr, new); 67 + } 68 + 69 + __rust_helper s16 rust_helper_atomic_i16_xchg_acquire(s16 *ptr, s16 new) 70 + { 71 + return xchg_acquire(ptr, new); 72 + }