3 files changed, 6 insertions, 0 deletions

diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index 7b725020823c..7c668c8a6f95 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -719,6 +719,9 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
         case BLKSECTGET:
                 return compat_put_ushort(arg,
                                          queue_max_sectors(bdev_get_queue(bdev)));
+        case BLKROTATIONAL:
+                return compat_put_ushort(arg,
+                                         !blk_queue_nonrot(bdev_get_queue(bdev)));
         case BLKRASET: /* compatible, but no compat_ptr (!) */
         case BLKFRASET:
                 if (!capable(CAP_SYS_ADMIN))
diff --git a/block/ioctl.c b/block/ioctl.c
index ca939fc1030f..337d207ab14d 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -278,6 +278,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
                 return put_uint(arg, bdev_discard_zeroes_data(bdev));
         case BLKSECTGET:
                 return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev)));
+        case BLKROTATIONAL:
+                return put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev)));
         case BLKRASET:
         case BLKFRASET:
                 if(!capable(CAP_SYS_ADMIN))
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e0bc4ffb8e7f..95dd911506f1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -319,6 +319,7 @@ struct inodes_stat_t {
 #define BLKPBSZGET _IO(0x12,123)
 #define BLKDISCARDZEROES _IO(0x12,124)
 #define BLKSECDISCARD _IO(0x12,125)
+#define BLKROTATIONAL _IO(0x12,126)
 
 #define BMAP_IOCTL 1            /* obsolete - kept for compatibility */
 #define FIBMAP     _IO(0x00,1)  /* bmap access */