There is a lot of unnecessary duplication of content of the seccomp material in prctl(2) and seccomp(2). Trevor Woerner also noted that there is an error in prctl(2), where it says that the filters "are run in order until the first non-allow result is seen", which contradicts the correct statement in seccomp(2) that *all* filters are executed. So, rewrite the seccomp material in prctl(2) to strip out most of the content duplicated in seccomp(2), and replace the removed text with statements deferring to to seccomp(2). Reported-by: Trevor Woerner <twoerner@gmail.com> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>