From: Arnd Bergmann <arnd@xxxxxxxx> Subject: nilfs2: use 64-bit superblock timstamps The mount time field in the superblock uses a 64-bit timestamp, but calling get_seconds() may truncate the current time to 32 bits. This changes it to ktime_get_real_seconds() to avoid the potential overflow. Link: http://lkml.kernel.org/r/20180620075041.4154396-1-arnd@xxxxxxxx Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Acked-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx> Cc: David Howells <dhowells@xxxxxxxxxx> Cc: Jeff Layton <jlayton@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/nilfs2/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/nilfs2/super.c~nilfs2-use-64-bit-superblock-timstamps +++ a/fs/nilfs2/super.c @@ -834,7 +834,7 @@ static int nilfs_setup_super(struct supe sbp[0]->s_max_mnt_count = cpu_to_le16(NILFS_DFL_MAX_MNT_COUNT); sbp[0]->s_mnt_count = cpu_to_le16(mnt_count + 1); - sbp[0]->s_mtime = cpu_to_le64(get_seconds()); + sbp[0]->s_mtime = cpu_to_le64(ktime_get_real_seconds()); skip_mount_setup: sbp[0]->s_state = _
