Merge branch 'pm-devfreq'

[cascardo/linux.git] / Documentation / filesystems / porting

diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index f24d1b8..0f88e60 100644 (file)
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -504,3 +504,20 @@ in your dentry operations instead.
 [mandatory]
        __fd_install() & fd_install() can now sleep. Callers should not
        hold a spinlock or other resources that do not allow a schedule.
+--
+[mandatory]
+       any symlink that might use page_follow_link_light/page_put_link() must
+       have inode_nohighmem(inode) called before anything might start playing with
+       its pagecache.
+--
+[mandatory]
+       ->follow_link() is replaced with ->get_link(); same API, except that
+               * ->get_link() gets inode as a separate argument
+               * ->get_link() may be called in RCU mode - in that case NULL
+                 dentry is passed
+--
+[mandatory]
+       ->get_link() gets struct delayed_call *done now, and should do
+       set_delayed_call() where it used to set *cookie.
+       ->put_link() is gone - just give the destructor to set_delayed_call()
+       in ->get_link().