1 files changed, 28 insertions, 0 deletions
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
new file mode 100644
index 000000000..eed54c53f
--- /dev/null
+++ b/arch/um/kernel/syscall.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ */
+
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/utsname.h>
+#include <linux/syscalls.h>
+#include <asm/current.h>
+#include <asm/mman.h>
+#include <linux/uaccess.h>
+#include <asm/unistd.h>
+
+long old_mmap(unsigned long addr, unsigned long len,
+	      unsigned long prot, unsigned long flags,
+	      unsigned long fd, unsigned long offset)
+{
+	long err = -EINVAL;
+	if (offset & ~PAGE_MASK)
+		goto out;
+
+	err = ksys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+ out:
+	return err;
+}