linux-kernel - [tip: locking/core] rust: helpers: Add i8/i16 atomic try_cmpxchg

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Message-ID: <176830140020.510.5720171850048014435.tip-bot2@tip-bot2>
Date: Tue, 13 Jan 2026 10:50:00 -0000
From: "tip-bot2 for FUJITA Tomonori" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: FUJITA Tomonori <fujita.tomonori@...il.com>,
 Boqun Feng <boqun.feng@...il.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: locking/core] rust: helpers: Add i8/i16 atomic
 try_cmpxchg_release helpers

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     b5992f07a9736ab6279181c848f42227af9945bf
Gitweb:        https://git.kernel.org/tip/b5992f07a9736ab6279181c848f42227af9945bf
Author:        FUJITA Tomonori <fujita.tomonori@...il.com>
AuthorDate:    Sat, 27 Dec 2025 20:59:50 +09:00
Committer:     Boqun Feng <boqun.feng@...il.com>
CommitterDate: Fri, 09 Jan 2026 19:01:41 +08:00

rust: helpers: Add i8/i16 atomic try_cmpxchg_release helpers

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

[boqun: Use try_cmpxchg_release() instead of raw_try_cmpxchg_release()]

Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>
Signed-off-by: Boqun Feng <boqun.feng@...il.com>
Link: https://patch.msgid.link/20251227115951.1424458-4-fujita.tomonori@gmail.com
---
 rust/helpers/atomic_ext.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/rust/helpers/atomic_ext.c b/rust/helpers/atomic_ext.c
index b6efec1..962ea05 100644
--- a/rust/helpers/atomic_ext.c
+++ b/rust/helpers/atomic_ext.c
@@ -117,3 +117,13 @@ __rust_helper bool rust_helper_atomic_i16_try_cmpxchg_acquire(s16 *ptr, s16 *old
 {
 	return try_cmpxchg_acquire(ptr, old, new);
 }
+
+__rust_helper bool rust_helper_atomic_i8_try_cmpxchg_release(s8 *ptr, s8 *old, s8 new)
+{
+	return try_cmpxchg_release(ptr, old, new);
+}
+
+__rust_helper bool rust_helper_atomic_i16_try_cmpxchg_release(s16 *ptr, s16 *old, s16 new)
+{
+	return try_cmpxchg_release(ptr, old, new);
+}