staging: lustre: llite: clarify some debug messages for statahead

Make some of the error reporting more clear for the statahead
thread startup and is_first_dirent() function.
Signed-off-by: wang di <di.wang@intel.com>
Reviewed-on: http://review.whamcloud.com/7043
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3531Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/llite/statahead.c

@@ -1075,9 +1075,9 @@ static int ll_statahead_thread(void *arg)
 
 		if (IS_ERR(page)) {
 			rc = PTR_ERR(page);
-			CDEBUG(D_READA, "error reading dir "DFID" at %llu/%llu: [rc %d] [parent %u]\n",
+			CDEBUG(D_READA, "error reading dir "DFID" at %llu/%llu: opendir_pid = %u: rc = %d\n",
 			       PFID(ll_inode2fid(dir)), pos, sai->sai_index,
-			       rc, plli->lli_opendir_pid);
+			       plli->lli_opendir_pid, rc);
 			goto out;
 		}
 
@@ -1364,9 +1364,10 @@ static int is_first_dirent(struct inode *dir, struct dentry *dentry)
 			struct ll_inode_info *lli = ll_i2info(dir);
 
 			rc = PTR_ERR(page);
-			CERROR("error reading dir "DFID" at %llu: [rc %d] [parent %u]\n",
+			CERROR("%s: error reading dir "DFID" at %llu: opendir_pid = %u : rc = %d\n",
+			       ll_get_fsname(dir->i_sb, NULL, 0),
 			       PFID(ll_inode2fid(dir)), pos,
-			       rc, lli->lli_opendir_pid);
+			       lli->lli_opendir_pid, rc);
 			break;
 		}