Moving the Linux Kernel to Modern C(lwn.net)

   void fun(int x)
   {
     struct foo = { x };       // not allowed in C89
     int bar[3] = { 0, x };    // ditto
   }

    struct list_head {
       struct list_head *next, *prev;
    };

    struct foo {
       int fooness;
       struct list_head list;
    };

    struct foo *iterator;

    list_for_each_entry(iterator, &foo_list, list) {
        do_something_with(iterator);
    }

    #define list_for_each_entry(pos, head, member)              \
        for (pos = list_entry((head)->next, typeof(*pos), member);  \
            &pos->member != (head);    \
            pos = list_entry(pos->member.next, typeof(*pos), member))

    #define list_entry(ptr, type, member) \
         container_of(ptr, type, member)

    #define container_of(ptr, type, member) ({          \
         const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
         (type *)( (char *)__mptr - offsetof(type,member) );})

    for(int i = 0; i < 10; i++) {
        // ...
    }

    {
        int i;
        for(i = 0; i < 10; i++) {
            // ...
        }
    }