linux-kernel - Re: [PATCH] ARM:net: an issue for k which is u32, never

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Message-ID: <513E7067.5020809@asianux.com>
Date:	Tue, 12 Mar 2013 08:01:43 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Mircea Gherzan <mgherzan@...il.com>
CC:	Russell King - ARM Linux <linux@....linux.org.uk>,
	nschichan@...ebox.fr, daniel.borkmann@....ee.ethz.ch,
	David Miller <davem@...emloft.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org >> linux-kernel@...r.kernel.org" 
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM:net: an issue for k which is u32, never < 0

于 2013年03月12日 00:54, Mircea Gherzan 写道:
> 2013/3/10 Chen Gang <gang.chen@...anux.com>:
>> >
>> >   k is u32 which never < 0, need type cast, or cause issue.
>> >
>> > Signed-off-by: Chen Gang <gang.chen@...anux.com>
>> > ---
>> >  arch/arm/net/bpf_jit_32.c |    2 +-
>> >  1 files changed, 1 insertions(+), 1 deletions(-)
>> >
>> > diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
>> > index 6828ef6..a0bd8a7 100644
>> > --- a/arch/arm/net/bpf_jit_32.c
>> > +++ b/arch/arm/net/bpf_jit_32.c
>> > @@ -576,7 +576,7 @@ load_ind:
>> >                         /* x = ((*(frame + k)) & 0xf) << 2; */
>> >                         ctx->seen |= SEEN_X | SEEN_DATA | SEEN_CALL;
>> >                         /* the interpreter should deal with the negative K */
>> > -                       if (k < 0)
>> > +                       if ((int)k < 0)
>> >                                 return -1;
>> >                         /* offset in r1: we might have to take the slow path */
>> >                         emit_mov_i(r_off, k, ctx);
>> > --
>> > 1.7.7.6
> Acked-by: Mircea Gherzan <mgherzan@...il.com>
> 
> 

  thank you very much.

  :-)

-- 
Chen Gang

Asianux Corporation
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