netdev - Re: [PATCH bpf-next v7 04/10] bpf: remove never-hit branches in verifier adjust_scalar_min_max

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Message-ID: <20180427232416.mw7uwx6s6jiyhfd3@ast-mbp>
Date:   Fri, 27 Apr 2018 16:24:17 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Yonghong Song <yhs@...com>
Cc:     ast@...com, daniel@...earbox.net, netdev@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH bpf-next v7 04/10] bpf: remove never-hit branches in
 verifier adjust_scalar_min_max_vals

On Wed, Apr 25, 2018 at 12:29:04PM -0700, Yonghong Song wrote:
> In verifier function adjust_scalar_min_max_vals,
> when src_known is false and the opcode is BPF_LSH/BPF_RSH,
> early return will happen in the function. So remove
> the branch in handling BPF_LSH/BPF_RSH when src_known is false.
> 
> Signed-off-by: Yonghong Song <yhs@...com>

Acked-by: Alexei Starovoitov <ast@...nel.org>