procfs: make proc_get_link to use dentry instead of inode

Prepare the ground for the next "map_files" patch which needs a name of a
link file to analyse.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vasiliy Kulikov <segoon@openwall.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 6d9e575..85c5073 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -253,7 +253,7 @@
 extern const struct proc_ns_operations ipcns_operations;
 
 union proc_op {
-	int (*proc_get_link)(struct inode *, struct path *);
+	int (*proc_get_link)(struct dentry *, struct path *);
 	int (*proc_read)(struct task_struct *task, char *page);
 	int (*proc_show)(struct seq_file *m,
 		struct pid_namespace *ns, struct pid *pid,