linux-kernel - Re: [PATCH v2 net-next 3/3] ARM: net: bpf_jit_32: support BPF_S_ANC_SECCOMP_LD

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Message-ID: <CAKU6vyathpp4Ky_kcTu_WFenLEdo9Mai4TUE=EWYo9=UuQUMcg@mail.gmail.com>
Date:	Sat, 27 Apr 2013 14:32:19 -0400
From:	Xi Wang <xi.wang@...il.com>
To:	Daniel Borkmann <dborkman@...hat.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Will Drewry <wad@...omium.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Russell King <linux@....linux.org.uk>,
	David Laight <david.laight@...lab.com>,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nicolas Schichan <nschichan@...ebox.fr>
Subject: Re: [PATCH v2 net-next 3/3] ARM: net: bpf_jit_32: support
 BPF_S_ANC_SECCOMP_LD_W instruction

On Sat, Apr 27, 2013 at 2:27 AM, Daniel Borkmann <dborkman@...hat.com> wrote:
> Arent't you doing here a similar thing in terms of getting arch as Eric
> criticized (Nicolas' implementation does not use that part btw.)? Also,
> even if it would be possible here, now your 2 JIT implementations differ
> in behaviour. I think this is unintended.

Eric's comment was about x86, where the audit arch could change on the
fly.  For ARM, the audit arch doesn't change---syscall_get_arch()
always returns AUDIT_ARCH_ARM.

> Besides all that, I think I also pointed you to a patch that already made
> it in for ARM, not sure why you keep posting the ARM JIT implementation?

That's why I asked in the other post if you wanted me to rebase
against linux-next or net-next.  The ARM part 3/3 is not needed if
rebased against linux-next with Nicolas's patches.

- xi
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