linux-kernel - Re: [PATCH net] ARM: net: make BPF_LD | BPF_IND instruction trigger r

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Message-Id: <20151005.070155.1958954047126197017.davem@davemloft.net>
Date:	Mon, 05 Oct 2015 07:01:55 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	nschichan@...ebox.fr
Cc:	linux@....linux.org.uk, mgherzan@...il.com, daniel@...earbox.net,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH net] ARM: net: make BPF_LD | BPF_IND instruction
 trigger r_X initialisation to 0.

From: Nicolas Schichan <nschichan@...ebox.fr>
Date: Fri,  2 Oct 2015 15:39:12 +0200

> Without this patch, if the only instructions using r_X are of the
> BPF_LD | BPF_IND type, r_X would not be reset to 0, using whatever
> value was there when entering the jited code. With this patch, r_X
> will be correctly marked as used so it will be reset to 0 in the
> prologue code.
> 
> This fix also makes the test "LD_IND byte default X" pass in the
> test_bpf module when the ARM JIT is enabled.
> 
> Signed-off-by: Nicolas Schichan <nschichan@...ebox.fr>

Applied.
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