Branch b1_4

Comment what med_open_lock is locking.

diff --git a/lustre/include/linux/lustre_export.h b/lustre/include/linux/lustre_export.h
index 0b75d4c..012f3c8 100644 (file)
--- a/lustre/include/linux/lustre_export.h
+++ b/lustre/include/linux/lustre_export.h
@@ -12,7 +12,7 @@ struct mds_client_data;
 
 struct mds_export_data {
         struct list_head        med_open_head;
-        spinlock_t              med_open_lock;
+        spinlock_t              med_open_lock; /* lock med_open_head, mfd_list*/
         struct mds_client_data *med_mcd;
         loff_t                  med_lr_off;
         int                     med_lr_idx;