dm_rh_dec        1249 drivers/md/dm-raid1.c 			dm_rh_dec(ms->rh, bio_record->write_region);
dm_rh_dec         582 drivers/md/dm-region-hash.c EXPORT_SYMBOL_GPL(dm_rh_dec);
dm_rh_dec          76 include/linux/dm-region-hash.h void dm_rh_dec(struct dm_region_hash *rh, region_t region);