README: bump minimal required kernel version

We generally try to support 2y old kernels, which allows us bump the
minimal required version to 3.11 now.

Also, clarify that support for the unified cgroup hierarchy requires 4.2
or newer.

diff --git a/README b/README
index d84bf8ea69e05ef3d115656c2eb815ef541449e9..27cc9a01681829af75365e8c06272be4ffbe7dc9 100644 (file)
--- a/README
+++ b/README
@@ -36,8 +36,8 @@ LICENSE:
         - except src/udev/* which is (currently still) GPLv2, GPLv2+
 
 REQUIREMENTS:
-        Linux kernel >= 3.7
-        Linux kernel >= 3.8 for Smack support
+        Linux kernel >= 3.11
+        Linux kernel >= 4.2 for unified cgroup hierarchy support
 
         Kernel Config Options:
           CONFIG_DEVTMPFS