add dts config

hc

2023-12-06 08f87f769b595151be1afeff53e144f543faa614

 kernel/drivers/md/dm-switch.c
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@@ -53,7 +53,7 @@
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 	/*
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 	 * Array of dm devices to switch between.
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 	 */
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-	struct switch_path path_list[0];
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+	struct switch_path path_list[];
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 };
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 static struct switch_ctx *alloc_switch_ctx(struct dm_target *ti, unsigned nr_paths,
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@@ -61,8 +61,7 @@
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 {
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 	struct switch_ctx *sctx;
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-	sctx = kzalloc(sizeof(struct switch_ctx) + nr_paths * sizeof(struct switch_path),
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-		       GFP_KERNEL);
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+	sctx = kzalloc(struct_size(sctx, path_list, nr_paths), GFP_KERNEL);
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 	if (!sctx)
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 		return NULL;
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