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diff --git a/drivers/char/ftape/lowlevel/ftape-ecc.h b/drivers/char/ftape/lowlevel/ftape-ecc.h
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+#ifndef _FTAPE_ECC_H_
+#define _FTAPE_ECC_H_
+
+/*
+ * Copyright (C) 1993 Ning and David Mosberger.
+ * Original:
+ * Copyright (C) 1993 Bas Laarhoven.
+ * Copyright (C) 1992 David L. Brown, Jr.
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING. If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
+ USA.
+
+ *
+ * $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/ftape-ecc.h,v $
+ * $Revision: 1.2 $
+ * $Date: 1997/10/05 19:18:11 $
+ *
+ * This file contains the definitions for the
+ * Reed-Solomon error correction code
+ * for the QIC-40/80 tape streamer device driver.
+ */
+
+#include "../lowlevel/ftape-bsm.h"
+
+#define BAD_CLEAR(entry) ((entry)=0)
+#define BAD_SET(entry,sector) ((entry)|=(1<<(sector)))
+#define BAD_CHECK(entry,sector) ((entry)&(1<<(sector)))
+
+/*
+ * Return values for ecc_correct_data:
+ */
+enum {
+ ECC_OK, /* Data was correct. */
+ ECC_CORRECTED, /* Correctable error in data. */
+ ECC_FAILED, /* Could not correct data. */
+};
+
+/*
+ * Representation of an in memory segment. MARKED_BAD lists the
+ * sectors that were marked bad during formatting. If the N-th sector
+ * in a segment is marked bad, bit 1<<N will be set in MARKED_BAD.
+ * The sectors should be read in from the disk and packed, as if the
+ * bad sectors were not there, and the segment just contained fewer
+ * sectors. READ_SECTORS is a bitmap of errors encountered while
+ * reading the data. These offsets are relative to the packed data.
+ * BLOCKS is a count of the sectors not marked bad. This is just to
+ * prevent having to count the zero bits in MARKED_BAD each time this
+ * is needed. DATA is the actual sector packed data from (or to) the
+ * tape.
+ */
+ struct memory_segment {
+ SectorMap marked_bad;
+ SectorMap read_bad;
+ int blocks;
+ __u8 *data;
+ SectorMap corrected;
+ };
+
+/*
+ * ecc.c defined global variables:
+ */
+#ifdef TEST
+extern int ftape_ecc_tracing;
+#endif
+
+/*
+ * ecc.c defined global functions:
+ */
+extern int ftape_ecc_correct_data(struct memory_segment *data);
+extern int ftape_ecc_set_segment_parity(struct memory_segment *data);
+
+#endif /* _FTAPE_ECC_H_ */