datapath: Update kernel support to 3.2.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Bug #7772

diff --git a/datapath/brcompat.c b/datapath/brcompat.c
index 718e489..bd223c7 100644 (file)
--- a/datapath/brcompat.c
+++ b/datapath/brcompat.c
@@ -8,6 +8,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/uaccess.h>
 #include <linux/completion.h>

diff --git a/datapath/datapath.c b/datapath/datapath.c
index d2815e5..9a22aab 100644 (file)
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -53,8 +53,8 @@
 #include "vport-internal_dev.h"
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \
-    LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)
-#error Kernels before 2.6.18 or after 3.1 are not supported by this version of Open vSwitch.
+    LINUX_VERSION_CODE > KERNEL_VERSION(3,2,0)
+#error Kernels before 2.6.18 or after 3.2 are not supported by this version of Open vSwitch.
 #endif
 
 int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);

diff --git a/datapath/linux/compat/include/linux/skbuff.h b/datapath/linux/compat/include/linux/skbuff.h
index ccf4717..456d744 100644 (file)
--- a/datapath/linux/compat/include/linux/skbuff.h
+++ b/datapath/linux/compat/include/linux/skbuff.h
@@ -232,4 +232,11 @@ static inline bool skb_warn_if_lro(const struct sk_buff *skb)
 #define consume_skb kfree_skb
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)
+static inline struct page *skb_frag_page(const skb_frag_t *frag)
+{
+       return frag->page;
+}
+#endif
+
 #endif

diff --git a/datapath/tunnel.c b/datapath/tunnel.c
index 024861f..19056b9 100644 (file)
--- a/datapath/tunnel.c
+++ b/datapath/tunnel.c
@@ -1045,7 +1045,7 @@ static bool need_linearize(const struct sk_buff *skb)
         * change them from underneath us and we can skip the linearization.
         */
        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
-               if (unlikely(page_count(skb_shinfo(skb)->frags[i].page) > 1))
+               if (unlikely(page_count(skb_frag_page(&skb_shinfo(skb)->frags[i])) > 1))
                        return true;
 
        return false;