ck-sources 4.0.2 and 4.0.3 fail to build (while 4.0.1 succeeded) with the following error: arch/x86/built-in.o: In function `pvclock_init_vsyscall': (.init.text+0x1210b): undefined reference to `register_task_migration_notifier' Makefile:937: recipe for target 'vmlinux' failed make: *** [vmlinux] Error 1 A patch can be found at http://ck.kolivas.org/patches/bfs/4.0/4.0/pending/bfs462-rtmn-fix.patch
You might want to try 4.0.4 as these versions were removed yesterday.
4.0.4 fails as well (exact same error).
Fixed in 4.0.4-r1 Thanks for reporting!