/*
- * lib/reed_solomon/rslib.c
+ * lib/reed_solomon/reed_solomon.c
*
* Overview:
* Generic Reed Solomon encoder / decoder library
#include <linux/module.h>
#include <linux/rslib.h>
#include <linux/slab.h>
+#include <linux/mutex.h>
#include <asm/semaphore.h>
/* This list holds all currently allocated rs control structures */
static LIST_HEAD (rslist);
/* Protection for the list */
-static DECLARE_MUTEX(rslistlock);
+static DEFINE_MUTEX(rslistlock);
/**
* rs_init - Initialize a Reed-Solomon codec
- *
* @symsize: symbol size, bits (1-8)
* @gfpoly: Field generator polynomial coefficients
* @fcr: first root of RS code generator polynomial, index form
* @nroots: RS code generator polynomial degree (number of roots)
*
* Allocate a control structure and the polynom arrays for faster
- * en/decoding. Fill the arrays according to the given parameters
+ * en/decoding. Fill the arrays according to the given parameters.
*/
static struct rs_control *rs_init(int symsize, int gfpoly, int fcr,
int prim, int nroots)
/**
- * free_rs - Free the rs control structure, if its not longer used
- *
+ * free_rs - Free the rs control structure, if it is no longer used
* @rs: the control structure which is not longer used by the
* caller
*/
void free_rs(struct rs_control *rs)
{
- down(&rslistlock);
+ mutex_lock(&rslistlock);
rs->users--;
if(!rs->users) {
list_del(&rs->list);
kfree(rs->genpoly);
kfree(rs);
}
- up(&rslistlock);
+ mutex_unlock(&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
if (nroots < 0 || nroots >= (1<<symsize))
return NULL;
- down(&rslistlock);
+ mutex_lock(&rslistlock);
/* Walk through the list and look for a matching entry */
list_for_each(tmp, &rslist) {
list_add(&rs->list, &rslist);
}
out:
- up(&rslistlock);
+ mutex_unlock(&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
#ifdef CONFIG_REED_SOLOMON_DEC8
/**
* decode_rs8 - Decode codeword (8bit data width)
- *
* @rs: the rs control structure
* @data: data field of a given type
* @par: received parity data field
#ifdef CONFIG_REED_SOLOMON_ENC16
/**
* encode_rs16 - Calculate the parity for data values (16bit data width)
- *
* @rs: the rs control structure
* @data: data field of a given type
* @len: data length
#ifdef CONFIG_REED_SOLOMON_DEC16
/**
* decode_rs16 - Decode codeword (16bit data width)
- *
* @rs: the rs control structure
* @data: data field of a given type
* @par: received parity data field