add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

 kernel/drivers/md/raid5.h
..
..
@@ -637,6 +637,7 @@
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 	int			recovery_disabled;
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 	/* per cpu variables */
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 	struct raid5_percpu {
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+		spinlock_t	lock;		/* Protection for -RT */
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 		struct page	*spare_page; /* Used when checking P/Q in raid6 */
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 		struct flex_array *scribble;   /* space for constructing buffer
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 					      * lists and performing address