On Wed, Jan 13, 2021 at 06:41:27PM +0100, Piotr Figiel wrote: > +static int proc_pid_rseq(struct seq_file *m, struct pid_namespace *ns, > + struct pid *pid, struct task_struct *task) > +{ > + int res = lock_trace(task); > + > + if (res) > + return res; > + seq_printf(m, "0x%llx 0x%x\n", (uint64_t)task->rseq, task->rseq_sig); may I suggest "%tx", (uintptr_t) // or %lx Mandatory 64-bit is too much on 32-bit. Or even "%tx %08x" ?