1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index ac93d874578a..cf93bb80aff7 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -759,7 +759,7 @@ static int bitmap_storage_alloc(struct bitmap_storage *store,
                 bytes += sizeof(bitmap_super_t);
 
         num_pages = DIV_ROUND_UP(bytes, PAGE_SIZE);
-        offset = slot_number * (num_pages - 1);
+        offset = slot_number * num_pages;
 
         store->filemap = kmalloc(sizeof(struct page *)
                                  * num_pages, GFP_KERNEL);