fixup_red_left
void *fixup_red_left(struct kmem_cache *s, void *p);
result = fixup_red_left(cache, result);
start = fixup_red_left(s, slab_address(slab));
start = fixup_red_left(s, start);
for (__p = fixup_red_left(__s, __addr); \
obj = fixup_red_left(s, obj);
objp = fixup_red_left(s, objp);