From: Nicolas Schichan <nschichan@freebox.fr>
Date: Wed, 6 May 2015 14:12:28 +0000 (+0200)
Subject: seccomp: simplify seccomp_prepare_filter and reuse bpf_prepare_filter
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~163^2~344^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d9e12f42e58da475379b9080708b94f2095904af;p=pandora-kernel.git

seccomp: simplify seccomp_prepare_filter and reuse bpf_prepare_filter

Remove the calls to bpf_check_classic(), bpf_convert_filter() and
bpf_migrate_runtime() and let bpf_prepare_filter() take care of that
instead.

seccomp_check_filter() is passed to bpf_prepare_filter() so that it
gets called from there, after bpf_check_classic().

We can now remove exposure of two internal classic BPF functions
previously used by seccomp. The export of bpf_check_classic() symbol,
previously known as sk_chk_filter(), was there since pre git times,
and no in-tree module was using it, therefore remove it.

Joint work with Daniel Borkmann.

Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Kees Cook <keescook@chromium.org>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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