fast-import: fix unalinged allocation and access

The specialized pool allocator fast-import uses aligned objects on the
size of a pointer, which was not sufficient at least on Sparc.  Instead,
make the alignment for objects of type unitmax_t.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/fast-import.c b/fast-import.c
index 98c2bd535957a45e5ef189875859d4788d937e7e..4646c056f32818549635b6ecc6b1088dc08ff469 100644 (file)
--- a/fast-import.c
+++ b/fast-import.c
@@ -196,7 +196,7 @@ struct mem_pool
        struct mem_pool *next_pool;
        char *next_free;
        char *end;
-       char space[FLEX_ARRAY]; /* more */
+       uintmax_t space[FLEX_ARRAY]; /* more */
 };
 
 struct atom_str
@@ -534,15 +534,15 @@ static void *pool_alloc(size_t len)
                total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
                p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc);
                p->next_pool = mem_pool;
-               p->next_free = p->space;
+               p->next_free = (char *) p->space;
                p->end = p->next_free + mem_pool_alloc;
                mem_pool = p;
        }
 
        r = p->next_free;
-       /* round out to a pointer alignment */
-       if (len & (sizeof(void*) - 1))
-               len += sizeof(void*) - (len & (sizeof(void*) - 1));
+       /* round out to a 'uintmax_t' alignment */
+       if (len & (sizeof(uintmax_t) - 1))
+               len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
        p->next_free += len;
        return r;
 }