[PATCH] prune_one_dentry() tweaks

- Add description of d_lock handling to comments over prune_one_dentry().

- It has three callsites - uninline it, saving 200 bytes of text.

Cc: Jan Blunck <jblunck@suse.de>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Olaf Hering <olh@suse.de>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

fs/dcache.c

@@ -359,12 +359,13 @@ void d_prune_aliases(struct inode *inode)
 }
 
 /*
- * Throw away a dentry - free the inode, dput the parent.
- * This requires that the LRU list has already been
- * removed.
+ * Throw away a dentry - free the inode, dput the parent.  This requires that
+ * the LRU list has already been removed.
+ *
  * Called with dcache_lock, drops it and then regains.
+ * Called with dentry->d_lock held, drops it.
  */
-static inline void prune_one_dentry(struct dentry * dentry)
+static void prune_one_dentry(struct dentry * dentry)
 {
 	struct dentry * parent;