[LIB] reed_solomon: Clean up trailing white spaces

include/linux/rslib.h

@@ -1,15 +1,15 @@
-/* 
+/*
  * include/linux/rslib.h
  *
  * Overview:
  *   Generic Reed Solomon encoder / decoder library
- *   
+ *
  * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
  *
  * RS code lifted from reed solomon library written by Phil Karn
  * Copyright 2002 Phil Karn, KA9Q
  *
- * $Id: rslib.h,v 1.3 2004/10/05 22:08:22 gleixner Exp $
+ * $Id: rslib.h,v 1.4 2005/11/07 11:14:52 gleixner Exp $
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -21,20 +21,20 @@
 
 #include <linux/list.h>
 
-/** 
+/**
  * struct rs_control - rs control structure
- * 
+ *
  * @mm:		Bits per symbol
  * @nn:		Symbols per block (= (1<<mm)-1)
  * @alpha_to:	log lookup table
  * @index_of:	Antilog lookup table
- * @genpoly:	Generator polynomial 
+ * @genpoly:	Generator polynomial
  * @nroots:	Number of generator roots = number of parity symbols
  * @fcr:	First consecutive root, index form
- * @prim:	Primitive element, index form 
- * @iprim:	prim-th root of 1, index form 
- * @gfpoly:	The primitive generator polynominal 
- * @users:	Users of this structure 
+ * @prim:	Primitive element, index form
+ * @iprim:	prim-th root of 1, index form
+ * @gfpoly:	The primitive generator polynominal
+ * @users:	Users of this structure
  * @list:	List entry for the rs control list
 */
 struct rs_control {
@@ -58,7 +58,7 @@ int encode_rs8(struct rs_control *rs, uint8_t *data, int len, uint16_t *par,
 	       uint16_t invmsk);
 #endif
 #ifdef CONFIG_REED_SOLOMON_DEC8
-int decode_rs8(struct rs_control *rs, uint8_t *data, uint16_t *par, int len, 
+int decode_rs8(struct rs_control *rs, uint8_t *data, uint16_t *par, int len,
 		uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk,
 	       uint16_t *corr);
 #endif
@@ -75,7 +75,7 @@ int decode_rs16(struct rs_control *rs, uint16_t *data, uint16_t *par, int len,
 #endif
 
 /* Create or get a matching rs control structure */
-struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim, 
+struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
 			   int nroots);
 
 /* Release a rs control structure */
@@ -87,9 +87,9 @@ void free_rs(struct rs_control *rs);
  *  @x:		the value to reduce
  *
  *  where
- *  rs->mm = number of bits per symbol	
+ *  rs->mm = number of bits per symbol
  *  rs->nn = (2^rs->mm) - 1
- *  
+ *
  *  Simple arithmetic modulo would return a wrong result for values
  *  >= 3 * rs->nn
 */

lib/reed_solomon/Makefile

@@ -1,5 +1,5 @@
 #
-# This is a modified version of reed solomon lib, 
+# This is a modified version of reed solomon lib,
 #
 
 obj-$(CONFIG_REED_SOLOMON) += reed_solomon.o

lib/reed_solomon/decode_rs.c

@@ -1,22 +1,22 @@
-/* 
+/*
  * lib/reed_solomon/decode_rs.c
  *
  * Overview:
  *   Generic Reed Solomon encoder / decoder library
- *   
+ *
  * Copyright 2002, Phil Karn, KA9Q
  * May be used under the terms of the GNU General Public License (GPL)
  *
  * Adaption to the kernel by Thomas Gleixner (tglx@linutronix.de)
  *
- * $Id: decode_rs.c,v 1.6 2004/10/22 15:41:47 gleixner Exp $
+ * $Id: decode_rs.c,v 1.7 2005/11/07 11:14:59 gleixner Exp $
  *
  */
 
-/* Generic data width independent code which is included by the 
+/* Generic data width independent code which is included by the
  * wrappers.
  */
-{ 
+{
 	int deg_lambda, el, deg_omega;
 	int i, j, r, k, pad;
 	int nn = rs->nn;
@@ -41,9 +41,9 @@
 	pad = nn - nroots - len;
 	if (pad < 0 || pad >= nn)
 		return -ERANGE;
-		
+
 	/* Does the caller provide the syndrome ? */
-	if (s != NULL) 
+	if (s != NULL)
 		goto decode;
 
 	/* form the syndromes; i.e., evaluate data(x) at roots of
@@ -54,11 +54,11 @@
 	for (j = 1; j < len; j++) {
 		for (i = 0; i < nroots; i++) {
 			if (syn[i] == 0) {
-				syn[i] = (((uint16_t) data[j]) ^ 
+				syn[i] = (((uint16_t) data[j]) ^
 					  invmsk) & msk;
 			} else {
 				syn[i] = ((((uint16_t) data[j]) ^
-					   invmsk) & msk) ^ 
+					   invmsk) & msk) ^
 					alpha_to[rs_modnn(rs, index_of[syn[i]] +
 						       (fcr + i) * prim)];
 			}
@@ -70,7 +70,7 @@
 			if (syn[i] == 0) {
 				syn[i] = ((uint16_t) par[j]) & msk;
 			} else {
-				syn[i] = (((uint16_t) par[j]) & msk) ^ 
+				syn[i] = (((uint16_t) par[j]) & msk) ^
 					alpha_to[rs_modnn(rs, index_of[syn[i]] +
 						       (fcr+i)*prim)];
 			}
@@ -99,14 +99,14 @@
 
 	if (no_eras > 0) {
 		/* Init lambda to be the erasure locator polynomial */
-		lambda[1] = alpha_to[rs_modnn(rs, 
+		lambda[1] = alpha_to[rs_modnn(rs,
 					      prim * (nn - 1 - eras_pos[0]))];
 		for (i = 1; i < no_eras; i++) {
 			u = rs_modnn(rs, prim * (nn - 1 - eras_pos[i]));
 			for (j = i + 1; j > 0; j--) {
 				tmp = index_of[lambda[j - 1]];
 				if (tmp != nn) {
-					lambda[j] ^= 
+					lambda[j] ^=
 						alpha_to[rs_modnn(rs, u + tmp)];
 				}
 			}
@@ -127,8 +127,8 @@
 		discr_r = 0;
 		for (i = 0; i < r; i++) {
 			if ((lambda[i] != 0) && (s[r - i - 1] != nn)) {
-				discr_r ^= 
-					alpha_to[rs_modnn(rs, 
+				discr_r ^=
+					alpha_to[rs_modnn(rs,
 							  index_of[lambda[i]] +
 							  s[r - i - 1])];
 			}
@@ -143,7 +143,7 @@
 			t[0] = lambda[0];
 			for (i = 0; i < nroots; i++) {
 				if (b[i] != nn) {
-					t[i + 1] = lambda[i + 1] ^ 
+					t[i + 1] = lambda[i + 1] ^
 						alpha_to[rs_modnn(rs, discr_r +
 								  b[i])];
 				} else
@@ -229,7 +229,7 @@
 		num1 = 0;
 		for (i = deg_omega; i >= 0; i--) {
 			if (omega[i] != nn)
-				num1 ^= alpha_to[rs_modnn(rs, omega[i] + 
+				num1 ^= alpha_to[rs_modnn(rs, omega[i] +
 							i * root[j])];
 		}
 		num2 = alpha_to[rs_modnn(rs, root[j] * (fcr - 1) + nn)];
@@ -239,13 +239,13 @@
 		 * lambda_pr of lambda[i] */
 		for (i = min(deg_lambda, nroots - 1) & ~1; i >= 0; i -= 2) {
 			if (lambda[i + 1] != nn) {
-				den ^= alpha_to[rs_modnn(rs, lambda[i + 1] + 
+				den ^= alpha_to[rs_modnn(rs, lambda[i + 1] +
 						       i * root[j])];
 			}
 		}
 		/* Apply error to data */
 		if (num1 != 0 && loc[j] >= pad) {
-			uint16_t cor = alpha_to[rs_modnn(rs,index_of[num1] + 
+			uint16_t cor = alpha_to[rs_modnn(rs,index_of[num1] +
 						       index_of[num2] +
 						       nn - index_of[den])];
 			/* Store the error correction pattern, if a

lib/reed_solomon/encode_rs.c

@@ -1,19 +1,19 @@
-/* 
+/*
  * lib/reed_solomon/encode_rs.c
  *
  * Overview:
  *   Generic Reed Solomon encoder / decoder library
- *   
+ *
  * Copyright 2002, Phil Karn, KA9Q
  * May be used under the terms of the GNU General Public License (GPL)
  *
  * Adaption to the kernel by Thomas Gleixner (tglx@linutronix.de)
  *
- * $Id: encode_rs.c,v 1.4 2004/10/22 15:41:47 gleixner Exp $
+ * $Id: encode_rs.c,v 1.5 2005/11/07 11:14:59 gleixner Exp $
  *
  */
 
-/* Generic data width independent code which is included by the 
+/* Generic data width independent code which is included by the
  * wrappers.
  * int encode_rsX (struct rs_control *rs, uintX_t *data, int len, uintY_t *par)
  */
@@ -35,16 +35,16 @@
 	for (i = 0; i < len; i++) {
 		fb = index_of[((((uint16_t) data[i])^invmsk) & msk) ^ par[0]];
 		/* feedback term is non-zero */
-		if (fb != nn) {	
+		if (fb != nn) {
 			for (j = 1; j < nroots; j++) {
-				par[j] ^= alpha_to[rs_modnn(rs, fb + 
+				par[j] ^= alpha_to[rs_modnn(rs, fb +
 							 genpoly[nroots - j])];
 			}
 		}
 		/* Shift */
 		memmove(&par[0], &par[1], sizeof(uint16_t) * (nroots - 1));
 		if (fb != nn) {
-			par[nroots - 1] = alpha_to[rs_modnn(rs, 
+			par[nroots - 1] = alpha_to[rs_modnn(rs,
 							    fb + genpoly[0])];
 		} else {
 			par[nroots - 1] = 0;

lib/reed_solomon/reed_solomon.c

@@ -1,22 +1,22 @@
-/* 
+/*
  * lib/reed_solomon/rslib.c
  *
  * Overview:
  *   Generic Reed Solomon encoder / decoder library
- *   
+ *
  * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
  *
  * Reed Solomon code lifted from reed solomon library written by Phil Karn
  * Copyright 2002 Phil Karn, KA9Q
  *
- * $Id: rslib.c,v 1.5 2004/10/22 15:41:47 gleixner Exp $
+ * $Id: rslib.c,v 1.7 2005/11/07 11:14:59 gleixner Exp $
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * Description:
- *	
+ *
  * The generic Reed Solomon library provides runtime configurable
  * encoding / decoding of RS codes.
  * Each user must call init_rs to get a pointer to a rs_control
@@ -25,11 +25,11 @@
  * If a structure is generated then the polynomial arrays for
  * fast encoding / decoding are built. This can take some time so
  * make sure not to call this function from a time critical path.
- * Usually a module / driver should initialize the necessary 
+ * Usually a module / driver should initialize the necessary
  * rs_control structure on module / driver init and release it
  * on exit.
- * The encoding puts the calculated syndrome into a given syndrome 
- * buffer. 
+ * The encoding puts the calculated syndrome into a given syndrome
+ * buffer.
  * The decoding is a two step process. The first step calculates
  * the syndrome over the received (data + syndrome) and calls the
  * second stage, which does the decoding / error correction itself.
@@ -51,7 +51,7 @@ static LIST_HEAD (rslist);
 /* Protection for the list */
 static DECLARE_MUTEX(rslistlock);
 
-/** 
+/**
  * rs_init - Initialize a Reed-Solomon codec
  *
  * @symsize:	symbol size, bits (1-8)
@@ -63,7 +63,7 @@ static DECLARE_MUTEX(rslistlock);
  * Allocate a control structure and the polynom arrays for faster
  * en/decoding. Fill the arrays according to the given parameters
  */
-static struct rs_control *rs_init(int symsize, int gfpoly, int fcr, 
+static struct rs_control *rs_init(int symsize, int gfpoly, int fcr,
 				   int prim, int nroots)
 {
 	struct rs_control *rs;
@@ -124,15 +124,15 @@ static struct rs_control *rs_init(int symsize, int gfpoly, int fcr,
 		/* Multiply rs->genpoly[] by  @**(root + x) */
 		for (j = i; j > 0; j--) {
 			if (rs->genpoly[j] != 0) {
-				rs->genpoly[j] = rs->genpoly[j -1] ^ 
-					rs->alpha_to[rs_modnn(rs, 
+				rs->genpoly[j] = rs->genpoly[j -1] ^
+					rs->alpha_to[rs_modnn(rs,
 					rs->index_of[rs->genpoly[j]] + root)];
 			} else
 				rs->genpoly[j] = rs->genpoly[j - 1];
 		}
 		/* rs->genpoly[0] can never be zero */
-		rs->genpoly[0] = 
-			rs->alpha_to[rs_modnn(rs, 
+		rs->genpoly[0] =
+			rs->alpha_to[rs_modnn(rs,
 				rs->index_of[rs->genpoly[0]] + root)];
 	}
 	/* convert rs->genpoly[] to index form for quicker encoding */
@@ -153,7 +153,7 @@ errrs:
 }
 
 
-/** 
+/**
  *  free_rs - Free the rs control structure, if its not longer used
  *
  *  @rs:	the control structure which is not longer used by the
@@ -173,19 +173,19 @@ void free_rs(struct rs_control *rs)
 	up(&rslistlock);
 }
 
-/** 
+/**
  * init_rs - Find a matching or allocate a new rs control structure
  *
  *  @symsize:	the symbol size (number of bits)
  *  @gfpoly:	the extended Galois field generator polynomial coefficients,
  *		with the 0th coefficient in the low order bit. The polynomial
  *		must be primitive;
- *  @fcr:  	the first consecutive root of the rs code generator polynomial 
+ *  @fcr:  	the first consecutive root of the rs code generator polynomial
  *		in index form
  *  @prim:	primitive element to generate polynomial roots
  *  @nroots:	RS code generator polynomial degree (number of roots)
  */
-struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim, 
+struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
 			   int nroots)
 {
 	struct list_head	*tmp;
@@ -198,9 +198,9 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
     		return NULL;
 	if (prim <= 0 || prim >= (1<<symsize))
     		return NULL;
-	if (nroots < 0 || nroots >= (1<<symsize) || nroots > 8)
+	if (nroots < 0 || nroots >= (1<<symsize))
 		return NULL;
-	
+
 	down(&rslistlock);
 
 	/* Walk through the list and look for a matching entry */
@@ -211,9 +211,9 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
 		if (gfpoly != rs->gfpoly)
 			continue;
 		if (fcr != rs->fcr)
-			continue;	
+			continue;
 		if (prim != rs->prim)
-			continue;	
+			continue;
 		if (nroots != rs->nroots)
 			continue;
 		/* We have a matching one already */
@@ -227,18 +227,18 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
 		rs->users = 1;
 		list_add(&rs->list, &rslist);
 	}
-out:	
+out:
 	up(&rslistlock);
 	return rs;
 }
 
 #ifdef CONFIG_REED_SOLOMON_ENC8
-/** 
+/**
  *  encode_rs8 - Calculate the parity for data values (8bit data width)
  *
  *  @rs:	the rs control structure
  *  @data:	data field of a given type
- *  @len:	data length 
+ *  @len:	data length
  *  @par:	parity data, must be initialized by caller (usually all 0)
  *  @invmsk:	invert data mask (will be xored on data)
  *
@@ -246,7 +246,7 @@ out:
  *  symbol size > 8. The calling code must take care of encoding of the
  *  syndrome result for storage itself.
  */
-int encode_rs8(struct rs_control *rs, uint8_t *data, int len, uint16_t *par, 
+int encode_rs8(struct rs_control *rs, uint8_t *data, int len, uint16_t *par,
 	       uint16_t invmsk)
 {
 #include "encode_rs.c"
@@ -255,7 +255,7 @@ EXPORT_SYMBOL_GPL(encode_rs8);
 #endif
 
 #ifdef CONFIG_REED_SOLOMON_DEC8
-/** 
+/**
  *  decode_rs8 - Decode codeword (8bit data width)
  *
  *  @rs:	the rs control structure
@@ -273,7 +273,7 @@ EXPORT_SYMBOL_GPL(encode_rs8);
  *  syndrome result and the received parity before calling this code.
  */
 int decode_rs8(struct rs_control *rs, uint8_t *data, uint16_t *par, int len,
-	       uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk, 
+	       uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk,
 	       uint16_t *corr)
 {
 #include "decode_rs.c"
@@ -287,13 +287,13 @@ EXPORT_SYMBOL_GPL(decode_rs8);
  *
  *  @rs:	the rs control structure
  *  @data:	data field of a given type
- *  @len:	data length 
+ *  @len:	data length
  *  @par:	parity data, must be initialized by caller (usually all 0)
  *  @invmsk:	invert data mask (will be xored on data, not on parity!)
  *
  *  Each field in the data array contains up to symbol size bits of valid data.
  */
-int encode_rs16(struct rs_control *rs, uint16_t *data, int len, uint16_t *par, 
+int encode_rs16(struct rs_control *rs, uint16_t *data, int len, uint16_t *par,
 	uint16_t invmsk)
 {
 #include "encode_rs.c"
@@ -302,7 +302,7 @@ EXPORT_SYMBOL_GPL(encode_rs16);
 #endif
 
 #ifdef CONFIG_REED_SOLOMON_DEC16
-/** 
+/**
  *  decode_rs16 - Decode codeword (16bit data width)
  *
  *  @rs:	the rs control structure
@@ -312,13 +312,13 @@ EXPORT_SYMBOL_GPL(encode_rs16);
  *  @s:		syndrome data field (if NULL, syndrome is calculated)
  *  @no_eras:	number of erasures
  *  @eras_pos:	position of erasures, can be NULL
- *  @invmsk:	invert data mask (will be xored on data, not on parity!) 
+ *  @invmsk:	invert data mask (will be xored on data, not on parity!)
  *  @corr:	buffer to store correction bitmask on eras_pos
  *
  *  Each field in the data array contains up to symbol size bits of valid data.
  */
 int decode_rs16(struct rs_control *rs, uint16_t *data, uint16_t *par, int len,
-		uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk, 
+		uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk,
 		uint16_t *corr)
 {
 #include "decode_rs.c"