On Tue, Dec 21, 2021 at 06:08:45PM +0100, Arnd Bergmann wrote: > > -__SYSCALL(__NR_ptrace, sys_ptrace) > > +__SC_COMP(__NR_ptrace, sys_ptrace, compat_sys_ptrace) > > > > Right. We could merge sys_ptrace and compat_sys_ptrace() by adding > a in_compat_syscall() check, but either way works. I think merging them would be very useful, including merging compat_arch_ptrace into arch_ptrace. But we can leave that for later.