From: Kees Cook <keescook@chromium.org>
Date: Fri, 27 Jun 2014 22:01:35 +0000 (-0700)
Subject: seccomp: allow mode setting across threads
X-Git-Tag: cleanup-for-v3.18~110^2~14^2~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3ba2530cc06eb4aee4f1f754f43d781e8a12ee09;p=pandora-kernel.git

seccomp: allow mode setting across threads

This changes the mode setting helper to allow threads to change the
seccomp mode from another thread. We must maintain barriers to keep
TIF_SECCOMP synchronized with the rest of the seccomp state.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Andy Lutomirski <luto@amacapital.net>
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