diff --git a/fsck/main.c b/fsck/main.c
index 608635eb..aabfda4d 100644
--- a/fsck/main.c
+++ b/fsck/main.c
@@ -325,7 +325,7 @@ static int erofs_verify_xattr(struct erofs_inode *inode)
 		}
 	}
 
-	addr = iloc(inode->nid) + inode->inode_isize;
+	addr = erofs_iloc(inode) + inode->inode_isize;
 	ret = dev_read(0, buf, addr, xattr_hdr_size);
 	if (ret < 0) {
 		erofs_err("failed to read xattr header @ nid %llu: %d",
diff --git a/include/erofs/internal.h b/include/erofs/internal.h
index 46690f51..93e3a0ba 100644
--- a/include/erofs/internal.h
+++ b/include/erofs/internal.h
@@ -103,11 +103,6 @@ struct erofs_sb_info {
 /* make sure that any user of the erofs headers has atleast 64bit off_t type */
 extern int erofs_assert_largefile[sizeof(off_t)-8];
 
-static inline erofs_off_t iloc(erofs_nid_t nid)
-{
-	return erofs_pos(sbi.meta_blkaddr) + (nid << sbi.islotbits);
-}
-
 #define EROFS_FEATURE_FUNCS(name, compat, feature) \
 static inline bool erofs_sb_has_##name(void) \
 { \
@@ -219,6 +214,11 @@ struct erofs_inode {
 	unsigned int fragment_size;
 };
 
+static inline erofs_off_t erofs_iloc(struct erofs_inode *inode)
+{
+	return erofs_pos(sbi.meta_blkaddr) + (inode->nid << sbi.islotbits);
+}
+
 static inline bool is_inode_layout_compression(struct erofs_inode *inode)
 {
 	return erofs_inode_is_data_compressed(inode->datalayout);
diff --git a/lib/data.c b/lib/data.c
index 612112a9..86e28d9f 100644
--- a/lib/data.c
+++ b/lib/data.c
@@ -33,7 +33,7 @@ static int erofs_map_blocks_flatmode(struct erofs_inode *inode,
 		map->m_plen = erofs_pos(lastblk) - offset;
 	} else if (tailendpacking) {
 		/* 2 - inode inline B: inode, [xattrs], inline last blk... */
-		map->m_pa = iloc(vi->nid) + vi->inode_isize +
+		map->m_pa = erofs_iloc(vi) + vi->inode_isize +
 			vi->xattr_isize + erofs_blkoff(map->m_la);
 		map->m_plen = inode->i_size - offset;
 
@@ -89,7 +89,7 @@ int erofs_map_blocks(struct erofs_inode *inode,
 		unit = EROFS_BLOCK_MAP_ENTRY_SIZE;	/* block map */
 
 	chunknr = map->m_la >> vi->u.chunkbits;
-	pos = roundup(iloc(vi->nid) + vi->inode_isize +
+	pos = roundup(erofs_iloc(vi) + vi->inode_isize +
 		      vi->xattr_isize, unit) + unit * chunknr;
 
 	err = blk_read(0, buf, erofs_blknr(pos), 1);
diff --git a/lib/namei.c b/lib/namei.c
index 37517419..423c1ddc 100644
--- a/lib/namei.c
+++ b/lib/namei.c
@@ -28,7 +28,7 @@ int erofs_read_inode_from_disk(struct erofs_inode *vi)
 	char buf[sizeof(struct erofs_inode_extended)];
 	struct erofs_inode_compact *dic;
 	struct erofs_inode_extended *die;
-	const erofs_off_t inode_loc = iloc(vi->nid);
+	const erofs_off_t inode_loc = erofs_iloc(vi);
 
 	ret = dev_read(0, buf, inode_loc, sizeof(*dic));
 	if (ret < 0)
diff --git a/lib/xattr.c b/lib/xattr.c
index 87a95c7c..9e839353 100644
--- a/lib/xattr.c
+++ b/lib/xattr.c
@@ -871,8 +871,8 @@ static int init_inode_xattrs(struct erofs_inode *vi)
 		return -ENOATTR;
 	}
 
-	it.blkaddr = erofs_blknr(iloc(vi->nid) + vi->inode_isize);
-	it.ofs = erofs_blkoff(iloc(vi->nid) + vi->inode_isize);
+	it.blkaddr = erofs_blknr(erofs_iloc(vi) + vi->inode_isize);
+	it.ofs = erofs_blkoff(erofs_iloc(vi) + vi->inode_isize);
 
 	ret = blk_read(0, it.page, it.blkaddr, 1);
 	if (ret < 0)
@@ -962,8 +962,8 @@ static int inline_xattr_iter_pre(struct xattr_iter *it,
 
 	inline_xattr_ofs = vi->inode_isize + xattr_header_sz;
 
-	it->blkaddr = erofs_blknr(iloc(vi->nid) + inline_xattr_ofs);
-	it->ofs = erofs_blkoff(iloc(vi->nid) + inline_xattr_ofs);
+	it->blkaddr = erofs_blknr(erofs_iloc(vi) + inline_xattr_ofs);
+	it->ofs = erofs_blkoff(erofs_iloc(vi) + inline_xattr_ofs);
 
 	ret = blk_read(0, it->page, it->blkaddr, 1);
 	if (ret < 0)
diff --git a/lib/zmap.c b/lib/zmap.c
index 209b5d78..7428d115 100644
--- a/lib/zmap.c
+++ b/lib/zmap.c
@@ -39,7 +39,7 @@ static int z_erofs_fill_inode_lazy(struct erofs_inode *vi)
 	if (vi->flags & EROFS_I_Z_INITED)
 		return 0;
 
-	pos = round_up(iloc(vi->nid) + vi->inode_isize + vi->xattr_isize, 8);
+	pos = round_up(erofs_iloc(vi) + vi->inode_isize + vi->xattr_isize, 8);
 	ret = dev_read(0, buf, pos, sizeof(buf));
 	if (ret < 0)
 		return -EIO;
@@ -143,7 +143,7 @@ static int legacy_load_cluster_from_disk(struct z_erofs_maprecorder *m,
 					 unsigned long lcn)
 {
 	struct erofs_inode *const vi = m->inode;
-	const erofs_off_t ibase = iloc(vi->nid);
+	const erofs_off_t ibase = erofs_iloc(vi);
 	const erofs_off_t pos = Z_EROFS_FULL_INDEX_ALIGN(ibase +
 			vi->inode_isize + vi->xattr_isize) +
 		lcn * sizeof(struct z_erofs_lcluster_index);
@@ -342,7 +342,7 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m,
 {
 	struct erofs_inode *const vi = m->inode;
 	const unsigned int lclusterbits = vi->z_logical_clusterbits;
-	const erofs_off_t ebase = round_up(iloc(vi->nid) + vi->inode_isize +
+	const erofs_off_t ebase = round_up(erofs_iloc(vi) + vi->inode_isize +
 					   vi->xattr_isize, 8) +
 		sizeof(struct z_erofs_map_header);
 	const unsigned int totalidx = BLK_ROUND_UP(vi->i_size);