netdev - Re: [PATCH bpf v2] selftests/bpf: Fix xdp_synproxy compilation failure in 32-bit arch

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Message-ID: <83637fd7-5daf-bce9-80e4-85383fafd4c9@meta.com>
Date:   Thu, 10 Nov 2022 23:29:55 -0800
From:   Yonghong Song <yhs@...a.com>
To:     Yang Jihong <yangjihong1@...wei.com>, ast@...nel.org,
        daniel@...earbox.net, davem@...emloft.net, kuba@...nel.org,
        hawk@...nel.org, john.fastabend@...il.com, andrii@...nel.org,
        martin.lau@...ux.dev, song@...nel.org, yhs@...com,
        kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com,
        jolsa@...nel.org, mykolal@...com, shuah@...nel.org,
        tariqt@...dia.com, maximmi@...dia.com, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf v2] selftests/bpf: Fix xdp_synproxy compilation
 failure in 32-bit arch



On 11/10/22 7:08 PM, Yang Jihong wrote:
> xdp_synproxy fails to be compiled in the 32-bit arch, log is as follows:
> 
>    xdp_synproxy.c: In function 'parse_options':
>    xdp_synproxy.c:175:36: error: left shift count >= width of type [-Werror=shift-count-overflow]
>      175 |                 *tcpipopts = (mss6 << 32) | (ttl << 24) | (wscale << 16) | mss4;
>          |                                    ^~
>    xdp_synproxy.c: In function 'syncookie_open_bpf_maps':
>    xdp_synproxy.c:289:28: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
>      289 |                 .map_ids = (__u64)map_ids,
>          |                            ^
> 
> Fix it.
> 
> Fixes: fb5cd0ce70d4 ("selftests/bpf: Add selftests for raw syncookie helpers")
> Signed-off-by: Yang Jihong <yangjihong1@...wei.com>

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