[PATCH 1/3] rust: sync: add helpers for mb, dma_mb and friends

Gary Guo
2026-04-02T15:25:29Z

From: Gary Guo <gary@garyguo.net>

They supplement the existing smp_mb, smp_rmb and smp_wmb.

Signed-off-by: Gary Guo <gary@garyguo.net>
---
rust/helpers/barrier.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/rust/helpers/barrier.c b/rust/helpers/barrier.c
index fed8853745c8..dbc7a3017c78 100644
--- a/rust/helpers/barrier.c
+++ b/rust/helpers/barrier.c
@@ -2,6 +2,36 @@

#include <asm/barrier.h>

+__rust_helper void rust_helper_mb(void)
+{
+ mb();
+}
+
+__rust_helper void rust_helper_rmb(void)
+{
+ rmb();
+}
+
+__rust_helper void rust_helper_wmb(void)
+{
+ wmb();
+}
+
+__rust_helper void rust_helper_dma_mb(void)
+{
+ dma_mb();
+}
+
+__rust_helper void rust_helper_dma_rmb(void)
+{
+ dma_rmb();
+}
+
+__rust_helper void rust_helper_dma_wmb(void)
+{
+ dma_wmb();
+}
+
__rust_helper void rust_helper_smp_mb(void)
{
smp_mb();
--
2.51.2