1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/entry/vdso/common/vgetcpu.c b/arch/x86/entry/vdso/common/vgetcpu.c
new file mode 100644
index 000000000000..6381b472b7c5
--- /dev/null
+++ b/arch/x86/entry/vdso/common/vgetcpu.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2006 Andi Kleen, SUSE Labs.
+ *
+ * Fast user context implementation of getcpu()
+ */
+
+#include <linux/kernel.h>
+#include <asm/segment.h>
+#include <vdso/processor.h>
+
+notrace long
+__vdso_getcpu(unsigned *cpu, unsigned *node, void *unused)
+{
+	vdso_read_cpunode(cpu, node);
+
+	return 0;
+}
+
+long getcpu(unsigned *cpu, unsigned *node, void *tcache)
+	__attribute__((weak, alias("__vdso_getcpu")));