nilfs2: move NILFS_SUPER_MAGIC to linux/magic.h

move NILFS_SUPER_MAGIC macro to linux/magic.h from linux/nilfs2_fs.h
in the same manner as other filesystem magic number defined in the file.
Signed-off-by: NJiro SEKIBA <jir@unicus.jp>
Signed-off-by: NRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

include/linux/magic.h

@@ -23,6 +23,7 @@
 #define XENFS_SUPER_MAGIC	0xabba1974
 #define EXT4_SUPER_MAGIC	0xEF53
 #define BTRFS_SUPER_MAGIC	0x9123683E
+#define NILFS_SUPER_MAGIC	0x3434
 #define HPFS_SUPER_MAGIC	0xf995e849
 #define ISOFS_SUPER_MAGIC	0x9660
 #define JFFS2_SUPER_MAGIC	0x72b6

include/linux/nilfs2_fs.h

@@ -40,6 +40,7 @@
 
 #include <linux/types.h>
 #include <linux/ioctl.h>
+#include <linux/magic.h>
 
 
 #define NILFS_INODE_BMAP_SIZE	7
@@ -242,7 +243,6 @@ struct nilfs_super_block {
 #define NILFS_USER_INO		11	/* Fisrt user's file inode number */
 
 #define NILFS_SB_OFFSET_BYTES	1024	/* byte offset of nilfs superblock */
-#define NILFS_SUPER_MAGIC	0x3434	/* NILFS filesystem  magic number */
 
 #define NILFS_SEG_MIN_BLOCKS	16	/* Minimum number of blocks in
 					   a full segment */