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[ Upstream commite4c9cf0ce8] 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:fb5cd0ce70("selftests/bpf: Add selftests for raw syncookie helpers") Signed-off-by: Yang Jihong <yangjihong1@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20221111030836.37632-1-yangjihong1@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.