md/md-bitmap: add 'file_pages' into struct md_bitmap_stats

There are no functional changes, avoid dereferencing bitmap directly to
prepare inventing a new bitmap.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240826074452.1490072-8-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
This commit is contained in:
Yu Kuai 2024-08-26 15:44:17 +08:00 • committed by Song Liu
commit 10bc2ac105
3 changed files with 17 additions and 8 deletions