1 files changed, 40 insertions, 10 deletions

diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
index fbf6ff25cd1b..04c61a9d7b76 100644
--- a/drivers/staging/erofs/inode.c
+++ b/drivers/staging/erofs/inode.c
@@ -19,7 +19,7 @@ static int read_inode(struct inode *inode, void *data)
 {
 	struct erofs_vnode *vi = EROFS_V(inode);
 	struct erofs_inode_v1 *v1 = data;
-	const unsigned advise = le16_to_cpu(v1->i_advise);
+	const unsigned int advise = le16_to_cpu(v1->i_advise);
 
 	vi->data_mapping_mode = __inode_data_mapping(advise);
 
@@ -112,7 +112,8 @@ static int read_inode(struct inode *inode, void *data)
  * try_lock since it takes no much overhead and
  * will success immediately.
  */
-static int fill_inline_data(struct inode *inode, void *data, unsigned m_pofs)
+static int fill_inline_data(struct inode *inode, void *data,
+			    unsigned int m_pofs)
 {
 	struct erofs_vnode *vi = EROFS_V(inode);
 	struct erofs_sb_info *sbi = EROFS_I_SB(inode);
@@ -152,7 +153,7 @@ static int fill_inode(struct inode *inode, int isdir)
 	void *data;
 	int err;
 	erofs_blk_t blkaddr;
-	unsigned ofs;
+	unsigned int ofs;
 
 	trace_erofs_fill_inode(inode, isdir);
 
@@ -231,10 +232,45 @@ out_unlock:
 	return err;
 }
 
+/*
+ * erofs nid is 64bits, but i_ino is 'unsigned long', therefore
+ * we should do more for 32-bit platform to find the right inode.
+ */
+#if BITS_PER_LONG == 32
+static int erofs_ilookup_test_actor(struct inode *inode, void *opaque)
+{
+	const erofs_nid_t nid = *(erofs_nid_t *)opaque;
+
+	return EROFS_V(inode)->nid == nid;
+}
+
+static int erofs_iget_set_actor(struct inode *inode, void *opaque)
+{
+	const erofs_nid_t nid = *(erofs_nid_t *)opaque;
+
+	inode->i_ino = erofs_inode_hash(nid);
+	return 0;
+}
+#endif
+
+static inline struct inode *erofs_iget_locked(struct super_block *sb,
+					      erofs_nid_t nid)
+{
+	const unsigned long hashval = erofs_inode_hash(nid);
+
+#if BITS_PER_LONG >= 64
+	/* it is safe to use iget_locked for >= 64-bit platform */
+	return iget_locked(sb, hashval);
+#else
+	return iget5_locked(sb, hashval, erofs_ilookup_test_actor,
+		erofs_iget_set_actor, &nid);
+#endif
+}
+
 struct inode *erofs_iget(struct super_block *sb,
 	erofs_nid_t nid, bool isdir)
 {
-	struct inode *inode = iget_locked(sb, nid);
+	struct inode *inode = erofs_iget_locked(sb, nid);
 
 	if (unlikely(inode == NULL))
 		return ERR_PTR(-ENOMEM);
@@ -259,22 +295,16 @@ struct inode *erofs_iget(struct super_block *sb,
 const struct inode_operations erofs_generic_xattr_iops = {
 	.listxattr = erofs_listxattr,
 };
-#endif
 
-#ifdef CONFIG_EROFS_FS_XATTR
 const struct inode_operations erofs_symlink_xattr_iops = {
 	.get_link = page_get_link,
 	.listxattr = erofs_listxattr,
 };
-#endif
 
 const struct inode_operations erofs_special_inode_operations = {
-#ifdef CONFIG_EROFS_FS_XATTR
 	.listxattr = erofs_listxattr,
-#endif
 };
 
-#ifdef CONFIG_EROFS_FS_XATTR
 const struct inode_operations erofs_fast_symlink_xattr_iops = {
 	.get_link = simple_get_link,
 	.listxattr = erofs_listxattr,