From 6ddbfbc7e3efd4e53097af597eea7e9296020239 Mon Sep 17 00:00:00 2001
From: "Michael I. Bushnell" <mib@gnu.org>
Date: Fri, 12 Apr 1996 19:56:41 +0000
Subject: (diskfs_enter_lookup_cache): Never cache . or ..

---
 libdiskfs/name-cache.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libdiskfs/name-cache.c b/libdiskfs/name-cache.c
index daf54bed..a4270fe9 100644
--- a/libdiskfs/name-cache.c
+++ b/libdiskfs/name-cache.c
@@ -169,6 +169,13 @@ diskfs_enter_lookup_cache (struct node *dir, struct node *np, char *name)
   if (name_len > CACHE_NAME_LEN - 1)
     return;
 
+  /* Never cache . or ..; it's too much trouble to get the locking
+     order right.  */
+  if (name[0] == '.' 
+      && (name[1] == '\0'
+	  || (name[1] == '.' && name[2] == '\0')))
+    return;
+
   spin_lock (&cache_lock);
 
   if (lru_cache == 0)
-- 
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