diff --git a/block/ioctl.c b/block/ioctl.c
index 4476e0e8..769d296 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -185,6 +185,22 @@
 	return blkdev_issue_discard(bdev, start, len, GFP_KERNEL, flags);
 }
 
+static int blk_ioctl_zeroout(struct block_device *bdev, uint64_t start,
+			     uint64_t len)
+{
+	if (start & 511)
+		return -EINVAL;
+	if (len & 511)
+		return -EINVAL;
+	start >>= 9;
+	len >>= 9;
+
+	if (start + len > (i_size_read(bdev->bd_inode) >> 9))
+		return -EINVAL;
+
+	return blkdev_issue_zeroout(bdev, start, len, GFP_KERNEL);
+}
+
 static int put_ushort(unsigned long arg, unsigned short val)
 {
 	return put_user(val, (unsigned short __user *)arg);
@@ -300,6 +316,17 @@
 		return blk_ioctl_discard(bdev, range[0], range[1],
 					 cmd == BLKSECDISCARD);
 	}
+	case BLKZEROOUT: {
+		uint64_t range[2];
+
+		if (!(mode & FMODE_WRITE))
+			return -EBADF;
+
+		if (copy_from_user(range, (void __user *)arg, sizeof(range)))
+			return -EFAULT;
+
+		return blk_ioctl_zeroout(bdev, range[0], range[1]);
+	}
 
 	case HDIO_GETGEO: {
 		struct hd_geometry geo;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index aa11047..bd6f6e7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -335,6 +335,7 @@
 #define BLKDISCARDZEROES _IO(0x12,124)
 #define BLKSECDISCARD _IO(0x12,125)
 #define BLKROTATIONAL _IO(0x12,126)
+#define BLKZEROOUT _IO(0x12,127)
 
 #define BMAP_IOCTL 1		/* obsolete - kept for compatibility */
 #define FIBMAP	   _IO(0x00,1)	/* bmap access */