f1c1a9ee00e4 ("fork: Move memcg_charge_kernel_stack() into CONFIG_VMAP_STACK")
7865aba3ade4 ("fork: Don't assign the stack pointer in dup_task_struct()")
2bb0529c0bc0 ("fork, IA64: Provide alloc_thread_stack_node() for IA64")
546c42b2c5c1 ("fork: Duplicate task_struct before stack allocation")
be9a2277cafd ("fork: Redo ifdefs around task stack handling")