Thanks for the patch.

On Tue, Mar 26, 2019 at 8:55 AM Christian Brauner [off-list ref] wrote:

The pidctl() syscalls builds on, extends, and improves translate_pid() [4].
I quote Konstantins original patchset first that has already been acked and
picked up by Eric before and whose functionality is preserved in this
syscall:

We still haven't had a much-needed conversation about splitting this
system call into smaller logical operations. It's important that we
address this point before this patch is merged and becomes permanent
kernel ABI.