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diff --git a/sys/compat/linuxkpi/common/include/asm/barrier.h b/sys/compat/linuxkpi/common/include/asm/barrier.h
--- a/sys/compat/linuxkpi/common/include/asm/barrier.h
+++ b/sys/compat/linuxkpi/common/include/asm/barrier.h
@@ -58,4 +58,7 @@
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
+#define smp_store_release(p, v) do { smp_mb(); WRITE_ONCE(*p, v); } while (0)
+#define smp_load_acquire(p) ({ typeof(*p) _v = READ_ONCE(*p); smp_mb(); _v; })
+
#endif /* _LINUXKPI_ASM_BARRIER_H_ */

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