diff options
| -rw-r--r-- | include/linux/raid/pq.h | 1 | ||||
| -rw-r--r-- | lib/raid6/mktables.c | 20 |
2 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/raid/pq.h b/include/linux/raid/pq.h index 4d57bbaaa1bf..30f945329818 100644 --- a/include/linux/raid/pq.h +++ b/include/linux/raid/pq.h @@ -142,6 +142,7 @@ int raid6_select_algo(void); extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256))); extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256))); extern const u8 raid6_gfexp[256] __attribute__((aligned(256))); +extern const u8 raid6_gflog[256] __attribute__((aligned(256))); extern const u8 raid6_gfinv[256] __attribute__((aligned(256))); extern const u8 raid6_gfexi[256] __attribute__((aligned(256))); diff --git a/lib/raid6/mktables.c b/lib/raid6/mktables.c index 39787db588b0..e824d088f72c 100644 --- a/lib/raid6/mktables.c +++ b/lib/raid6/mktables.c @@ -125,6 +125,26 @@ int main(int argc, char *argv[]) printf("EXPORT_SYMBOL(raid6_gfexp);\n"); printf("#endif\n"); + /* Compute log-of-2 table */ + printf("\nconst u8 __attribute__((aligned(256)))\n" + "raid6_gflog[256] =\n" "{\n"); + for (i = 0; i < 256; i += 8) { + printf("\t"); + for (j = 0; j < 8; j++) { + v = 255; + for (k = 0; k < 256; k++) + if (exptbl[k] == (i + j)) { + v = k; + break; + } + printf("0x%02x,%c", v, (j == 7) ? '\n' : ' '); + } + } + printf("};\n"); + printf("#ifdef __KERNEL__\n"); + printf("EXPORT_SYMBOL(raid6_gflog);\n"); + printf("#endif\n"); + /* Compute inverse table x^-1 == x^254 */ printf("\nconst u8 __attribute__((aligned(256)))\n" "raid6_gfinv[256] =\n" "{\n"); |