mtd: introduce mtd_is_locked interface

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index f30c358..8b99019 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -209,14 +209,13 @@
 	void (*sync) (struct mtd_info *mtd);
 	int (*lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
 	int (*unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
+	int (*is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
 
 	/* Backing device capabilities for this device
 	 * - provides mmap capabilities
 	 */
 	struct backing_dev_info *backing_dev_info;
 
-	int (*is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
-
 	/* Power Management functions */
 	int (*suspend) (struct mtd_info *mtd);
 	void (*resume) (struct mtd_info *mtd);
@@ -394,6 +393,11 @@
 	return mtd->unlock(mtd, ofs, len);
 }
 
+static inline int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+	return mtd->is_locked(mtd, ofs, len);
+}
+
 static inline struct mtd_info *dev_to_mtd(struct device *dev)
 {
 	return dev ? dev_get_drvdata(dev) : NULL;