1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vdso/processor.h b/arch/x86/include/asm/vdso/processor.h
new file mode 100644
index 000000000000..7000aeb59aa2
--- /dev/null
+++ b/arch/x86/include/asm/vdso/processor.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 ARM Ltd.
+ */
+#ifndef __ASM_VDSO_PROCESSOR_H
+#define __ASM_VDSO_PROCESSOR_H
+
+#ifndef __ASSEMBLER__
+
+/* PAUSE is a good thing to insert into busy-wait loops. */
+static __always_inline void native_pause(void)
+{
+	asm volatile("pause" ::: "memory");
+}
+
+static __always_inline void cpu_relax(void)
+{
+	native_pause();
+}
+
+struct getcpu_cache;
+
+notrace long __vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused);
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* __ASM_VDSO_PROCESSOR_H */