EXT4_MB_STRICT_CHECK
bool should_lock = ac->ac_flags & EXT4_MB_STRICT_CHECK;
if (!(ac->ac_flags & EXT4_MB_STRICT_CHECK) || seq_retry != *seq) {
ac->ac_flags |= EXT4_MB_STRICT_CHECK;
{ EXT4_MB_STRICT_CHECK, "STRICT_CHECK" })