Revert "Forgot to add net/ipv4/tcp_zero_copy.c from put_page_callback patch"

This reverts commit ebab7a97621b880e936e2812af96ecdda0de47b9.

diff --git a/net/ipv4/tcp_zero_copy.c b/net/ipv4/tcp_zero_copy.c
deleted file mode 100644 (file)
index 9cd990c..0000000
--- a/net/ipv4/tcp_zero_copy.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- *     Support routines for TCP zero copy transmit
- *
- *     Created by Vladislav Bolkhovitin
- *
- *     This program is free software; you can redistribute it and/or
- *      modify it under the terms of the GNU General Public License
- *      version 2 as published by the Free Software Foundation.
- */
-
-#include <linux/skbuff.h>
-
-net_get_page_callback_t net_get_page_callback __read_mostly;
-EXPORT_SYMBOL(net_get_page_callback);
-
-net_put_page_callback_t net_put_page_callback __read_mostly;
-EXPORT_SYMBOL(net_put_page_callback);
-
-/*
- * Caller of this function must ensure that at the moment when it's called
- * there are no pages in the system with net_priv field set to non-zero
- * value. Hence, this function, as well as net_get_page() and net_put_page(),
- * don't need any protection.
- */
-int net_set_get_put_page_callbacks(
-       net_get_page_callback_t get_callback,
-       net_put_page_callback_t put_callback)
-{
-       int res = 0;
-
-       if ((net_get_page_callback != NULL) && (get_callback != NULL) &&
-           (net_get_page_callback != get_callback)) {
-               res = -EBUSY;
-               goto out;
-       }
-
-       if ((net_put_page_callback != NULL) && (put_callback != NULL) &&
-           (net_put_page_callback != put_callback)) {
-               res = -EBUSY;
-               goto out;
-       }
-
-       net_get_page_callback = get_callback;
-       net_put_page_callback = put_callback;
-
-out:
-       return res;
-}
-EXPORT_SYMBOL(net_set_get_put_page_callbacks);