sanitize vfs_fsync calling conventions

Now that the last user passing a NULL file pointer is gone we can remove
the redundant dentry argument and associated hacks inside vfs_fsynmc_range.

The next step will be removig the dentry argument from ->fsync, but given
the luck with the last round of method prototype changes I'd rather
defer this until after the main merge window.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index dada03f..7e26caa 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -158,7 +158,7 @@
 	mutex_unlock(&dir->d_inode->i_mutex);
 	if (status == 0) {
 		clp->cl_firststate = 1;
-		vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
+		vfs_fsync(rec_file, 0);
 	}
 	nfs4_reset_creds(original_cred);
 	dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status);
@@ -288,7 +288,7 @@
 	status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1);
 	nfs4_reset_creds(original_cred);
 	if (status == 0)
-		vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
+		vfs_fsync(rec_file, 0);
 	mnt_drop_write(rec_file->f_path.mnt);
 out:
 	if (status)
@@ -325,7 +325,7 @@
 		goto out;
 	status = nfsd4_list_rec_dir(rec_file->f_path.dentry, purge_old);
 	if (status == 0)
-		vfs_fsync(rec_file, rec_file->f_path.dentry, 0);
+		vfs_fsync(rec_file, 0);
 	mnt_drop_write(rec_file->f_path.mnt);
 out:
 	if (status)