ceph: cleanup async writeback, truncation, invalidate helpers

Grab inode ref in helper.  Make work functions static, with consistent
naming.

Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 3930fb6..b2adfcc 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -573,18 +573,6 @@
 	return (struct ceph_client *)sb->s_fs_info;
 }
 
-static inline int ceph_queue_writeback(struct inode *inode)
-{
-	return queue_work(ceph_inode_to_client(inode)->wb_wq,
-		   &ceph_inode(inode)->i_wb_work);
-}
-
-static inline int ceph_queue_page_invalidation(struct inode *inode)
-{
-	return queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
-		   &ceph_inode(inode)->i_pg_inv_work);
-}
-
 
 /*
  * we keep buffered readdir results attached to file->private_data
@@ -772,10 +760,11 @@
 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
 
 extern int ceph_inode_set_size(struct inode *inode, loff_t size);
-extern void ceph_inode_writeback(struct work_struct *work);
-extern void ceph_vmtruncate_work(struct work_struct *work);
 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
-extern void __ceph_queue_vmtruncate(struct inode *inode);
+extern void ceph_queue_vmtruncate(struct inode *inode);
+
+extern void ceph_queue_invalidate(struct inode *inode);
+extern void ceph_queue_writeback(struct inode *inode);
 
 extern int ceph_do_getattr(struct inode *inode, int mask);
 extern int ceph_permission(struct inode *inode, int mask);