[PATCH 22/24] rust: sync: Add helpers for mb, dma_mb and friends

[Boqun Feng]

From: Gary Guo <gary@xxxxxxxxxxx>

They supplement the existing smp_mb, smp_rmb and smp_wmb.

Reviewed-by: Eliot Courtney <ecourtney@xxxxxxxxxx>
Signed-off-by: Gary Guo <gary@xxxxxxxxxxx>
Signed-off-by: Boqun Feng <boqun@xxxxxxxxxx>
Link: https://patch.msgid.link/20260609-rust-barrier-v2-1-30fcc48e1cd0@xxxxxxxxxxx
---
 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();
-- 
2.50.1 (Apple Git-155)