diff --git a/fs/hpfs/dentry.c b/fs/hpfs/dentry.c
new file mode 100644
index 0000000..0831912
--- /dev/null
+++ b/fs/hpfs/dentry.c
@@ -0,0 +1,60 @@
+/*
+ *  linux/fs/hpfs/dentry.c
+ *
+ *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ *  dcache operations
+ */
+
+#include "hpfs_fn.h"
+
+/*
+ * Note: the dentry argument is the parent dentry.
+ */
+
+static int hpfs_hash_dentry(struct dentry *dentry, struct qstr *qstr)
+{
+	unsigned long	 hash;
+	int		 i;
+	unsigned l = qstr->len;
+
+	if (l == 1) if (qstr->name[0]=='.') goto x;
+	if (l == 2) if (qstr->name[0]=='.' || qstr->name[1]=='.') goto x;
+	hpfs_adjust_length((char *)qstr->name, &l);
+	/*if (hpfs_chk_name((char *)qstr->name,&l))*/
+		/*return -ENAMETOOLONG;*/
+		/*return -ENOENT;*/
+	x:
+
+	hash = init_name_hash();
+	for (i = 0; i < l; i++)
+		hash = partial_name_hash(hpfs_upcase(hpfs_sb(dentry->d_sb)->sb_cp_table,qstr->name[i]), hash);
+	qstr->hash = end_name_hash(hash);
+
+	return 0;
+}
+
+static int hpfs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b)
+{
+	unsigned al=a->len;
+	unsigned bl=b->len;
+	hpfs_adjust_length((char *)a->name, &al);
+	/*hpfs_adjust_length((char *)b->name, &bl);*/
+	/* 'a' is the qstr of an already existing dentry, so the name
+	 * must be valid. 'b' must be validated first.
+	 */
+
+	if (hpfs_chk_name((char *)b->name, &bl)) return 1;
+	if (hpfs_compare_names(dentry->d_sb, (char *)a->name, al, (char *)b->name, bl, 0)) return 1;
+	return 0;
+}
+
+static struct dentry_operations hpfs_dentry_operations = {
+	.d_hash		= hpfs_hash_dentry,
+	.d_compare	= hpfs_compare_dentry,
+};
+
+void hpfs_set_dentry_operations(struct dentry *dentry)
+{
+	dentry->d_op = &hpfs_dentry_operations;
+}