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_relaxed helpers

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

[boqun: Use xchg_relaxed() instead of raw_xchg_relaxed()]

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/20251223062140.938325-5-fujita.tomonori@gmail.com

authored by

FUJITA Tomonori and committed by
Boqun Feng 910cbddc 1bfca1e7

+10
+10
rust/helpers/atomic_ext.c
··· 80 80 { 81 81 return xchg_release(ptr, new); 82 82 } 83 + 84 + __rust_helper s8 rust_helper_atomic_i8_xchg_relaxed(s8 *ptr, s8 new) 85 + { 86 + return xchg_relaxed(ptr, new); 87 + } 88 + 89 + __rust_helper s16 rust_helper_atomic_i16_xchg_relaxed(s16 *ptr, s16 new) 90 + { 91 + return xchg_relaxed(ptr, new); 92 + }