1 files changed, 37 insertions, 0 deletions

diff --git a/include/linux/ioctl32.h b/include/linux/ioctl32.h
new file mode 100644
index 000000000000..e1a641819428
--- /dev/null
+++ b/include/linux/ioctl32.h
@@ -0,0 +1,37 @@
+#ifndef IOCTL32_H
+#define IOCTL32_H 1
+
+struct file;
+
+typedef int (*ioctl_trans_handler_t)(unsigned int, unsigned int,
+                                        unsigned long, struct file *);
+
+struct ioctl_trans {
+        unsigned long cmd;
+        ioctl_trans_handler_t handler;
+        struct ioctl_trans *next;
+};
+
+/* 
+ * Register an 32bit ioctl translation handler for ioctl cmd.
+ *
+ * handler == NULL: use 64bit ioctl handler.
+ * arguments to handler:  fd: file descriptor
+ *                        cmd: ioctl command.
+ *                        arg: ioctl argument
+ *                        struct file *file: file descriptor pointer.
+ */ 
+
+#ifdef CONFIG_COMPAT
+extern int register_ioctl32_conversion(unsigned int cmd,
+                                ioctl_trans_handler_t handler);
+extern int unregister_ioctl32_conversion(unsigned int cmd);
+
+#else
+
+#define register_ioctl32_conversion(cmd, handler)       ({ 0; })
+#define unregister_ioctl32_conversion(cmd)              ({ 0; })
+
+#endif
+
+#endif