added <linux/fmc-sdb.h>

kernel/include/linux/fmc-sdb.h

+/*
+ * This file is separate from sdb.h, because I want that one to remain
+ * unchanged (as far as possible) from the official sdb distribution
+ *
+ * This file and associated functionality are a playground for me to
+ * understand stuff which will later be implemented in more generic places.
+ */
+#include <linux/sdb.h>
+
+/* This is the union of all currently defined types */
+union sdb_record {
+	struct sdb_interconnect ic;
+	struct sdb_device dev;
+	struct sdb_bridge bridge;
+	struct sdb_integration integr;
+	struct sdb_empty empty;
+};
+
+struct fmc_device;
+
+/* Every sdb table is turned into this structure */
+struct sdb_array {
+	int len;
+	int level;
+	struct fmc_device *fmc;		/* the device that hosts it */
+	struct sdb_array *parent;	/* NULL at root */
+	union sdb_record *record;	/* copies of the struct */
+	struct sdb_array **subtree;	/* only valid for bridge items */
+};
+
+extern int fmc_scan_sdb_tree(struct fmc_device *fmc, unsigned long address);
+extern void fmc_show_sdb_tree(struct fmc_device *fmc);
+extern unsigned long fmc_find_sdb_device(struct sdb_array *tree);