add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/nilfs2/segbuf.c
..
..
@@ -101,6 +101,12 @@
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 	if (unlikely(!bh))
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 		return -ENOMEM;
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+	lock_buffer(bh);
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+	if (!buffer_uptodate(bh)) {
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+		memset(bh->b_data, 0, bh->b_size);
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+		set_buffer_uptodate(bh);
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+	}
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+	unlock_buffer(bh);
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 	nilfs_segbuf_add_segsum_buffer(segbuf, bh);
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 	return 0;
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 }