#define BITMAP_NWORDS(_n) \
(((_n) + BITMAP_WORD_BITS - 1) / BITMAP_WORD_BITS)
+#define BITMAP_WORD_0 (0)
+#define BITMAP_WORD_1 ((bitmap_word)-1UL)
+
/*
* We wrap each word in a structure for type checking.
*/
-typedef struct {
+typedef struct bitmap {
bitmap_word w;
} bitmap;