btrfs_ioctl_get_dev_stats 4310 fs/btrfs/ioctl.c static long btrfs_ioctl_get_dev_stats(struct btrfs_fs_info *fs_info,
btrfs_ioctl_get_dev_stats  660 include/uapi/linux/btrfs.h struct btrfs_ioctl_get_dev_stats {