add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/md/raid0.h
..
..
@@ -6,6 +6,7 @@
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 	sector_t zone_end;	/* Start of the next zone (in sectors) */
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 	sector_t dev_start;	/* Zone offset in real dev (in sectors) */
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 	int	 nb_dev;	/* # of devices attached to the zone */
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+	int	 disk_shift;	/* start disk for the original layout */
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 };
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 /* Linux 3.14 (20d0189b101) made an unintended change to