linux-kernel - Re: [PATCH bpf] selftests/bpf: Fix casting error when cross-compiling test

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Date:   Tue, 8 Nov 2022 06:45:56 -0800
From:   Yonghong Song <yhs@...a.com>
To:     Pu Lehui <pulehui@...weicloud.com>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Eduard Zingerman <eddyz87@...il.com>,
        Pu Lehui <pulehui@...wei.com>
Subject: Re: [PATCH bpf] selftests/bpf: Fix casting error when cross-compiling
 test_verifier for 32-bit platforms



On 11/8/22 4:19 AM, Pu Lehui wrote:
> From: Pu Lehui <pulehui@...wei.com>
> 
> When cross-compiling test_verifier for 32-bit platforms, the casting error is shown below:
> 
> test_verifier.c:1263:27: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
>   1263 |  info.xlated_prog_insns = (__u64)*buf;
>        |                           ^
> cc1: all warnings being treated as errors
> 
> Fix it by adding zero-extension for it.
> 
> Fixes: 933ff53191eb ("selftests/bpf: specify expected instructions in test_verifier tests")
> Signed-off-by: Pu Lehui <pulehui@...wei.com>

Acked-by: Yonghong Song <yhs@...com>