1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 7d423721b327..ca5fdc1b7745 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -401,6 +401,7 @@ struct blk_zone_report_hdr {
         u8              padding[60];
 };
 
+extern unsigned int blkdev_nr_zones(struct block_device *bdev);
 extern int blkdev_report_zones(struct block_device *bdev,
                                sector_t sector, struct blk_zone *zones,
                                unsigned int *nr_zones, gfp_t gfp_mask);
@@ -414,6 +415,10 @@ extern int blkdev_reset_zones_ioctl(struct block_device *bdev, fmode_t mode,
 
 #else /* CONFIG_BLK_DEV_ZONED */
 
+static inline unsigned int blkdev_nr_zones(struct block_device *bdev)
+{
+        return 0;
+}
 static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
                                             fmode_t mode, unsigned int cmd,
                                             unsigned long arg)