x86_fsgsbase_read_task
extern unsigned long x86_fsgsbase_read_task(struct task_struct *task,
fsbase = x86_fsgsbase_read_task(task, task->thread.fsindex);
gsbase = x86_fsgsbase_read_task(task, task->thread.gsindex);
x86_fsgsbase_read_task(child, value);
x86_fsgsbase_read_task(child, value);