[MTD] mtdcore.c: share syms with mtd_blkdev.c

Fix the sparse warnings generated by the implicit
dependency of mtd_blkdevs.c and mtd_core.c for the
two symbols mtd_table and mtd_table_mutex. This is
done by adding an local header file mtdcore.h to
define these (including the warning about the
non-proliferation of these symbols).
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

drivers/mtd/mtd_blkdevs.c

@@ -23,10 +23,9 @@
 #include <linux/kthread.h>
 #include <asm/uaccess.h>
 
-static LIST_HEAD(blktrans_majors);
+#include "mtdcore.h"
 
-extern struct mutex mtd_table_mutex;
-extern struct mtd_info *mtd_table[];
+static LIST_HEAD(blktrans_majors);
 
 struct mtd_blkcore_priv {
 	struct task_struct *thread;

drivers/mtd/mtdcore.c

@@ -22,6 +22,8 @@
 
 #include <linux/mtd/mtd.h>
 
+#include "mtdcore.h"
+
 /* These are exported solely for the purpose of mtd_blkdevs.c. You
    should not use them for _anything_ else */
 DEFINE_MUTEX(mtd_table_mutex);

drivers/mtd/mtdcore.h

+/* linux/drivers/mtd/mtdcore.h
+ *
+ * Header file for driver private mtdcore exports
+ *
+ */
+
+/* These are exported solely for the purpose of mtd_blkdevs.c. You
+   should not use them for _anything_ else */
+
+extern struct mutex mtd_table_mutex;
+extern struct mtd_info *mtd_table[MAX_MTD_DEVICES];