ocfs2: remove unused ocfs2_orphan_scan_exit() declaration

ocfs2_orphan_scan_exit() is declared but not implemented.  Also perform a
minor cleanup in ocfs2_link_credits()

Link: http://lkml.kernel.org/r/71604351584F6A4EBAE558C676F37CA4014FC208AC@H3CMLB12-EX.srv.huawei-3com.com
Signed-off-by: guozhonghua <guozhonghua@h3c.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/journal.h

@@ -144,7 +144,6 @@ static inline void ocfs2_ci_set_new(struct ocfs2_super *osb,
 void ocfs2_orphan_scan_init(struct ocfs2_super *osb);
 void ocfs2_orphan_scan_start(struct ocfs2_super *osb);
 void ocfs2_orphan_scan_stop(struct ocfs2_super *osb);
-void ocfs2_orphan_scan_exit(struct ocfs2_super *osb);
 
 void ocfs2_complete_recovery(struct work_struct *work);
 void ocfs2_wait_for_recovery(struct ocfs2_super *osb);
@@ -441,7 +440,7 @@ static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir,
  * previous dirblock update in the free list */
 static inline int ocfs2_link_credits(struct super_block *sb)
 {
-	return 2*OCFS2_INODE_UPDATE_CREDITS + 4 +
+	return 2 * OCFS2_INODE_UPDATE_CREDITS + 4 +
 	       ocfs2_quota_trans_credits(sb);
 }