hfs_hash_dentry
extern int hfs_hash_dentry(const struct dentry *dentry, struct qstr *this);
EXPORT_SYMBOL_IF_KUNIT(hfs_hash_dentry);
KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name1));
KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name2));
KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name3));
.d_hash = hfs_hash_dentry,