diff options
| -rw-r--r-- | include/linux/rslib.h | 28 | ||||
| -rw-r--r-- | lib/reed_solomon/reed_solomon.c | 43 |
2 files changed, 48 insertions, 23 deletions
diff --git a/include/linux/rslib.h b/include/linux/rslib.h index 746580c1939c..2aae7ef987eb 100644 --- a/include/linux/rslib.h +++ b/include/linux/rslib.h @@ -20,6 +20,8 @@ #define _RSLIB_H_ #include <linux/list.h> +#include <linux/types.h> /* for gfp_t */ +#include <linux/gfp.h> /* for GFP_KERNEL */ /** * struct rs_control - rs control structure @@ -77,10 +79,30 @@ 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, - int nroots); +struct rs_control *init_rs_gfp(int symsize, int gfpoly, int fcr, int prim, + int nroots, gfp_t gfp); + +/** + * init_rs - Create a RS control struct and initialize it + * @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 + * in index form + * @prim: primitive element to generate polynomial roots + * @nroots: RS code generator polynomial degree (number of roots) + * + * Allocations use GFP_KERNEL. + */ +static inline struct rs_control *init_rs(int symsize, int gfpoly, int fcr, + int prim, int nroots) +{ + return init_rs_gfp(symsize, gfpoly, fcr, prim, nroots, GFP_KERNEL); +} + struct rs_control *init_rs_non_canonical(int symsize, int (*func)(int), - int fcr, int prim, int nroots); + int fcr, int prim, int nroots); /* Release a rs control structure */ void free_rs(struct rs_control *rs); diff --git a/lib/reed_solomon/reed_solomon.c b/lib/reed_solomon/reed_solomon.c index 06d04cfa9339..f8ae1f7b3558 100644 --- a/lib/reed_solomon/reed_solomon.c +++ b/lib/reed_solomon/reed_solomon.c @@ -59,19 +59,20 @@ static DEFINE_MUTEX(rslistlock); * @fcr: first root of RS code generator polynomial, index form * @prim: primitive element to generate polynomial roots * @nroots: RS code generator polynomial degree (number of roots) + * @gfp: GFP_ flags for allocations * * 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 (*gffunc)(int), - int fcr, int prim, int nroots) + int fcr, int prim, int nroots, gfp_t gfp) { struct rs_control *rs; int i, j, sr, root, iprim; /* Allocate the control structure */ - rs = kmalloc(sizeof (struct rs_control), GFP_KERNEL); - if (rs == NULL) + rs = kmalloc(sizeof(*rs), gfp); + if (!rs) return NULL; INIT_LIST_HEAD(&rs->list); @@ -85,15 +86,15 @@ static struct rs_control *rs_init(int symsize, int gfpoly, int (*gffunc)(int), rs->gffunc = gffunc; /* Allocate the arrays */ - rs->alpha_to = kmalloc(sizeof(uint16_t) * (rs->nn + 1), GFP_KERNEL); + rs->alpha_to = kmalloc(sizeof(uint16_t) * (rs->nn + 1), gfp); if (rs->alpha_to == NULL) goto errrs; - rs->index_of = kmalloc(sizeof(uint16_t) * (rs->nn + 1), GFP_KERNEL); + rs->index_of = kmalloc(sizeof(uint16_t) * (rs->nn + 1), gfp); if (rs->index_of == NULL) goto erralp; - rs->genpoly = kmalloc(sizeof(uint16_t) * (rs->nroots + 1), GFP_KERNEL); + rs->genpoly = kmalloc(sizeof(uint16_t) * (rs->nroots + 1), gfp); if(rs->genpoly == NULL) goto erridx; @@ -181,6 +182,7 @@ void free_rs(struct rs_control *rs) } mutex_unlock(&rslistlock); } +EXPORT_SYMBOL_GPL(free_rs); /** * init_rs_internal - Find a matching or allocate a new rs control structure @@ -195,13 +197,14 @@ void free_rs(struct rs_control *rs) * in index form * @prim: primitive element to generate polynomial roots * @nroots: RS code generator polynomial degree (number of roots) + * @gfp: GFP_ flags for allocations */ static struct rs_control *init_rs_internal(int symsize, int gfpoly, - int (*gffunc)(int), int fcr, - int prim, int nroots) + int (*gffunc)(int), int fcr, + int prim, int nroots, gfp_t gfp) { - struct list_head *tmp; - struct rs_control *rs; + struct list_head *tmp; + struct rs_control *rs; /* Sanity checks */ if (symsize < 1) @@ -236,7 +239,7 @@ static struct rs_control *init_rs_internal(int symsize, int gfpoly, } /* Create a new one */ - rs = rs_init(symsize, gfpoly, gffunc, fcr, prim, nroots); + rs = rs_init(symsize, gfpoly, gffunc, fcr, prim, nroots, gfp); if (rs) { rs->users = 1; list_add(&rs->list, &rslist); @@ -247,7 +250,7 @@ out: } /** - * init_rs - Find a matching or allocate a new rs control structure + * init_rs_gfp - 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 @@ -256,12 +259,14 @@ out: * in index form * @prim: primitive element to generate polynomial roots * @nroots: RS code generator polynomial degree (number of roots) + * @gfp: GFP_ flags for allocations */ -struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim, - int nroots) +struct rs_control *init_rs_gfp(int symsize, int gfpoly, int fcr, int prim, + int nroots, gfp_t gfp) { - return init_rs_internal(symsize, gfpoly, NULL, fcr, prim, nroots); + return init_rs_internal(symsize, gfpoly, NULL, fcr, prim, nroots, gfp); } +EXPORT_SYMBOL_GPL(init_rs_gfp); /** * init_rs_non_canonical - Find a matching or allocate a new rs control @@ -279,8 +284,10 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim, struct rs_control *init_rs_non_canonical(int symsize, int (*gffunc)(int), int fcr, int prim, int nroots) { - return init_rs_internal(symsize, 0, gffunc, fcr, prim, nroots); + return init_rs_internal(symsize, 0, gffunc, fcr, prim, nroots, + GFP_KERNEL); } +EXPORT_SYMBOL_GPL(init_rs_non_canonical); #ifdef CONFIG_REED_SOLOMON_ENC8 /** @@ -374,10 +381,6 @@ int decode_rs16(struct rs_control *rs, uint16_t *data, uint16_t *par, int len, EXPORT_SYMBOL_GPL(decode_rs16); #endif -EXPORT_SYMBOL_GPL(init_rs); -EXPORT_SYMBOL_GPL(init_rs_non_canonical); -EXPORT_SYMBOL_GPL(free_rs); - MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Reed Solomon encoder/decoder"); MODULE_AUTHOR("Phil Karn, Thomas Gleixner"); |