md/bitmap: use DIV_ROUND_UP instead of open-code
Also take the opportunity to simplify CHUNK_BLOCK_RATIO. Signed-off-by: NeilBrown <neilb@suse.de>
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@ -1694,9 +1694,8 @@ int bitmap_create(struct mddev *mddev)
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bitmap->counts.chunkshift = (ffz(~mddev->bitmap_info.chunksize)
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- BITMAP_BLOCK_SHIFT);
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chunks = (blocks + (1 << bitmap->counts.chunkshift) - 1) >>
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bitmap->counts.chunkshift;
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pages = (chunks + PAGE_COUNTER_RATIO - 1) / PAGE_COUNTER_RATIO;
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chunks = DIV_ROUND_UP_SECTOR_T(blocks, 1 << bitmap->counts.chunkshift);
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pages = DIV_ROUND_UP(chunks, PAGE_COUNTER_RATIO);
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BUG_ON(!pages);
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