datapath: Add support for 4.0 kernel.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>

Author: joestringer

.travis.yml

@@ -10,6 +10,7 @@ env:
   - TESTSUITE=1 KERNEL=3.18.1
   - TESTSUITE=1 OPTS="--enable-shared"
   - BUILD_ENV="-m32" OPTS="--disable-ssl"
+  - KERNEL=4.0.2
   - KERNEL=3.17.7 DPDK=1
   - KERNEL=3.17.7 DPDK=1 OPTS="--enable-shared"
   - KERNEL=3.17.7

.travis/build.sh

@@ -9,7 +9,9 @@ EXTRA_OPTS=""
 
 function install_kernel()
 {
-    if [[ "$1" =~ ^3.* ]]; then
+    if [[ "$1" =~ ^4.* ]]; then
+        PREFIX="v4.x"
+    elif [[ "$1" =~ ^3.* ]]; then
         PREFIX="v3.x"
     else
         PREFIX="v2.6/longterm/v2.6.32"

FAQ.md

@@ -156,7 +156,7 @@ A: The following table lists the Linux kernel versions against which the
 |    2.0.x     | 2.6.32 to 3.10
 |    2.1.x     | 2.6.32 to 3.11
 |    2.3.x     | 2.6.32 to 3.14
-|    2.4.x     | 2.6.32 to 3.19
+|    2.4.x     | 2.6.32 to 4.0
 
    Open vSwitch userspace should also work with the Linux kernel module
    built into Linux 3.3 and later.

NEWS

@@ -65,7 +65,7 @@ Post-v2.3.0
    - Added support for DPDK Tunneling. VXLAN, GRE, and Geneve are supported
      protocols. This is generic tunneling mechanism for userspace datapath.
    - Support for multicast snooping (IGMPv1 and IGMPv2)
-   - Support for Linux kernels up to 3.19.x
+   - Support for Linux kernels up to 4.0.x
    - The documentation now use the term 'destination' to mean one of syslog,
      console or file for vlog logging instead of the previously used term
      'facility'.

acinclude.m4

@@ -133,12 +133,14 @@ AC_DEFUN([OVS_CHECK_LINUX], [
     fi
     AC_MSG_RESULT([$kversion])
 
-    if test "$version" -ge 3; then
-       if test "$version" = 3 && test "$patchlevel" -le 19; then
-          : # Linux 3.x
+    if test "$version" -ge 4; then
+       if test "$version" = 4 && test "$patchlevel" -le 0; then
+          : # Linux 4.x
        else
-         AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 3.19.x is not supported (please refer to the FAQ for advice)])
+          AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.0.x is not supported (please refer to the FAQ for advice)])
        fi
+    elif test "$version" = 3; then
+       : # Linux 3.x
     else
        if test "$version" -le 1 || test "$patchlevel" -le 5 || test "$sublevel" -le 31; then
          AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 2.6.32 or later is required])