staging: lustre: uapi: move obd_ioctl_getdata() declaration

Move obd_ioctl_getdata() from lustre_ioctl.h to obd_class.h
since this function is only used by kernel space.

Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6401
Reviewed-on: https://review.whamcloud.com/24568
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lustre/lustre_ioctl.h

@@ -208,8 +208,6 @@ static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
 	return 0;
 }
 
-int obd_ioctl_getdata(char **buf, int *len, void __user *arg);
-
 /*
  * OBD_IOC_DATA_TYPE is only for compatibility reasons with older
  * Linux Lustre user tools. New ioctls should NOT use this macro as

drivers/staging/lustre/lustre/include/obd_class.h

@@ -1559,4 +1559,7 @@ struct root_squash_info {
 	struct rw_semaphore	rsi_sem;
 };
 
+/* linux-module.c */
+int obd_ioctl_getdata(char **buf, int *len, void __user *arg);
+
 #endif /* __LINUX_OBD_CLASS_H */