part_stat_read
host_reads = part_stat_read(req->ns->bdev, ios[READ]);
DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[READ]), 1000);
host_writes = part_stat_read(req->ns->bdev, ios[WRITE]);
DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[WRITE]), 1000);
host_reads += part_stat_read(ns->bdev, ios[READ]);
part_stat_read(ns->bdev, sectors[READ]), 1000);
host_writes += part_stat_read(ns->bdev, ios[WRITE]);
part_stat_read(ns->bdev, sectors[WRITE]), 1000);
host_reads = part_stat_read(req->ns->bdev, ios[READ]);
DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[READ]), 1000);
host_writes = part_stat_read(req->ns->bdev, ios[WRITE]);
DIV_ROUND_UP(part_stat_read(req->ns->bdev, sectors[WRITE]), 1000);
((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -
part_stat_read(sb->s_bdev, sectors[STAT_WRITE]);
((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -
(part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -
((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) -
return (u64)part_stat_read(bdev, sectors[STAT_WRITE]);
(part_stat_read(part, field[STAT_READ]) + \
part_stat_read(part, field[STAT_WRITE]) + \
part_stat_read(part, field[STAT_DISCARD]))