overprovision_segments
si->overp_segs = overprovision_segments(sbi);
ovp_blks = SEGS_TO_BLKS(sbi, overprovision_segments(sbi));
(overprovision_segments(sbi) - reserved_segments(sbi));
(overprovision_segments(sbi) - reserved_segments(sbi));
GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi));
(unsigned long long)(overprovision_segments(sbi)));
if (t > GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))