On Fri, Jan 15, 2021 at 12:51:03PM -0800, Luck, Tony wrote: > static void kill_me_now(struct callback_head *ch) > { > + p->mce_count = 0; > force_sig(SIGBUS); > } Brown paper bag time ... I just pasted that line from kill_me_maybe() and I thought I did a re-compile ... but obviously not since it gives error: ‘p’ undeclared (first use in this function) Option a) (just like kill_me_maybe) struct task_struct *p = container_of(cb, struct task_struct, mce_kill_me); Option b) (simpler ... not sure why PeterZ did the container_of thing current->mce_count = 0; -Tony