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authorNicolai Stange <nicstange@gmail.com>2016-03-22 13:12:39 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2016-04-05 20:35:48 +0800
commitd755290689646fa66cc4830ca55569f2c9863666 (patch)
tree1f53b405afdfe27b0b5549fb5283b0f5b162b64a /lib/mpi/mpicoder.c
parentcece762f6f3cb1c1687f467e98faef21b0096600 (diff)
downloadlinux-stericsson-d755290689646fa66cc4830ca55569f2c9863666.tar.gz
lib/mpi: mpi_write_sgl(): replace open coded endian conversion
Currently, the endian conversion from CPU order to BE is open coded in mpi_write_sgl(). Replace this by the centrally provided cpu_to_be*() macros. Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'lib/mpi/mpicoder.c')
-rw-r--r--lib/mpi/mpicoder.c27
1 files changed, 11 insertions, 16 deletions
diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index b05d3902d363..623439e4bad5 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -20,6 +20,7 @@
#include <linux/bitops.h>
#include <linux/count_zeros.h>
+#include <linux/byteorder/generic.h>
#include "mpi-internal.h"
#define MAX_EXTERN_MPI_BITS 16384
@@ -359,7 +360,13 @@ int mpi_write_to_sgl(MPI a, struct scatterlist *sgl, unsigned *nbytes,
int *sign)
{
u8 *p, *p2;
- mpi_limb_t alimb, alimb2;
+#if BYTES_PER_MPI_LIMB == 4
+ __be32 alimb;
+#elif BYTES_PER_MPI_LIMB == 8
+ __be64 alimb;
+#else
+#error please implement for this limb size.
+#endif
unsigned int n = mpi_get_size(a);
int i, x, y = 0, lzeros, buf_len;
@@ -383,22 +390,10 @@ int mpi_write_to_sgl(MPI a, struct scatterlist *sgl, unsigned *nbytes,
for (i = a->nlimbs - 1 - lzeros / BYTES_PER_MPI_LIMB,
lzeros %= BYTES_PER_MPI_LIMB;
i >= 0; i--) {
- alimb = a->d[i];
- p = (u8 *)&alimb2;
#if BYTES_PER_MPI_LIMB == 4
- *p++ = alimb >> 24;
- *p++ = alimb >> 16;
- *p++ = alimb >> 8;
- *p++ = alimb;
+ alimb = cpu_to_be32(a->d[i]);
#elif BYTES_PER_MPI_LIMB == 8
- *p++ = alimb >> 56;
- *p++ = alimb >> 48;
- *p++ = alimb >> 40;
- *p++ = alimb >> 32;
- *p++ = alimb >> 24;
- *p++ = alimb >> 16;
- *p++ = alimb >> 8;
- *p++ = alimb;
+ alimb = cpu_to_be64(a->d[i]);
#else
#error please implement for this limb size.
#endif
@@ -407,7 +402,7 @@ int mpi_write_to_sgl(MPI a, struct scatterlist *sgl, unsigned *nbytes,
lzeros = 0;
}
- p = p - sizeof(alimb) + y;
+ p = (u8 *)&alimb + y;
for (x = 0; x < sizeof(alimb) - y; x++) {
if (!buf_len) {