SELinux: rename dentry_open to file_open

dentry_open takes a file, rename it to file_open

Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/open.c b/fs/open.c
index 5720854..5eccdce 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -681,7 +681,7 @@
 
 	f->f_op = fops_get(inode->i_fop);
 
-	error = security_dentry_open(f, cred);
+	error = security_file_open(f, cred);
 	if (error)
 		goto cleanup_all;