diff options
Diffstat (limited to 'include/pt-sgi.h')
-rw-r--r-- | include/pt-sgi.h | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/include/pt-sgi.h b/include/pt-sgi.h index 547b37a87..5d6b68f13 100644 --- a/include/pt-sgi.h +++ b/include/pt-sgi.h @@ -93,15 +93,20 @@ struct sgi_disklabel { static inline uint32_t sgi_pt_checksum(struct sgi_disklabel *label) { - int i; - uint32_t *ptr = (uint32_t *) label; + int count; uint32_t sum = 0; + unsigned char *ptr = (unsigned char *) label; - i = sizeof(*label) / sizeof(*ptr); + count = sizeof(*label) / sizeof(uint32_t); + ptr += sizeof(uint32_t) * (count - 1); - while (i) { - i--; - sum -= be32_to_cpu(ptr[i]); + while (count--) { + uint32_t val; + + memcpy(&val, ptr, sizeof(uint32_t)); + sum -= be32_to_cpu(val); + + ptr -= sizeof(uint32_t); } return sum; |