first_word = 0;
spin_lock_irq(&b->bm_lock);
}
-
/* last page (respectively only page, for first page == last page) */
last_word = MLPP(el >> LN2_BPL);
- bm_set_full_words_within_one_page(mdev->bitmap, last_page, first_word, last_word);
+
+ /* consider bitmap->bm_bits = 32768, bitmap->bm_number_of_pages = 1. (or multiples).
+ * ==> e = 32767, el = 32768, last_page = 2,
+ * and now last_word = 0.
+ * We do not want to touch last_page in this case,
+ * as we did not allocate it, it is not present in bitmap->bm_pages.
+ */
+ if (last_word)
+ bm_set_full_words_within_one_page(mdev->bitmap, last_page, first_word, last_word);
/* possibly trailing bits.
* example: (e & 63) == 63, el will be e+1.