vserver 2.0 rc7

[linux-2.6.git] / include / linux / dcache.h

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 2da7686..50be290 100644 (file)
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -162,17 +162,16 @@ extern spinlock_t dcache_lock;
  * d_drop - drop a dentry
  * @dentry: dentry to drop
  *
- * d_drop() unhashes the entry from the parent
- * dentry hashes, so that it won't be found through
- * a VFS lookup any more. Note that this is different
- * from deleting the dentry - d_delete will try to
- * mark the dentry negative if possible, giving a
- * successful _negative_ lookup, while d_drop will
+ * d_drop() unhashes the entry from the parent dentry hashes, so that it won't
+ * be found through a VFS lookup any more. Note that this is different from
+ * deleting the dentry - d_delete will try to mark the dentry negative if
+ * possible, giving a successful _negative_ lookup, while d_drop will
  * just make the cache lookup fail.
  *
- * d_drop() is used mainly for stuff that wants
- * to invalidate a dentry for some reason (NFS
- * timeouts or autofs deletes).
+ * d_drop() is used mainly for stuff that wants to invalidate a dentry for some
+ * reason (NFS timeouts or autofs deletes).
+ *
+ * __d_drop requires dentry->d_lock.
  */
 
 static inline void __d_drop(struct dentry *dentry)
@@ -186,7 +185,9 @@ static inline void __d_drop(struct dentry *dentry)
 static inline void d_drop(struct dentry *dentry)
 {
        spin_lock(&dcache_lock);
+       spin_lock(&dentry->d_lock);
        __d_drop(dentry);
+       spin_unlock(&dentry->d_lock);
        spin_unlock(&dcache_lock);
 }