commit 5b97512954e9710fd45ab5778bf679205c35892d
Author: Xiao Ni <xni@redhat.com>
Date:   Sat Mar 18 10:33:45 2017 +0800

    mdadm: Forced type conversion to avoid truncation
    
    Gcc reports it needs 19 bytes to right to disk->serial. Because the
    type of argument i is int. But the meaning of i is failed disk
    number. So it doesn't need to use 19 bytes.  Just add a type
    conversion to avoid this building error
    
    Signed-off-by: Xiao Ni <xni@redhat.com>
    Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>

diff --git a/super-intel.c b/super-intel.c
index 343f20d..e1618f1 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -5228,7 +5228,7 @@ static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
 			disk->status = CONFIGURED_DISK | FAILED_DISK;
 			disk->scsi_id = __cpu_to_le32(~(__u32)0);
 			snprintf((char *) disk->serial, MAX_RAID_SERIAL_LEN,
-				 "missing:%d", i);
+				 "missing:%d", (__u8)i);
 		}
 		find_missing(super);
 	} else {