if CONFIG_SYSFS is not enabled in config, we get the below compile error, All errors (new ones prefixed by >>): csky-linux-ld: net/netfilter/core.o: in function `netfilter_init': core.c:(.init.text+0x42): undefined reference to `netfilter_lwtunnel_init' >> csky-linux-ld: core.c:(.init.text+0x56): undefined reference to `netfilter_lwtunnel_fini' >> csky-linux-ld: core.c:(.init.text+0x70): undefined reference to `netfilter_lwtunnel_init' csky-linux-ld: core.c:(.init.text+0x78): undefined reference to `netfilter_lwtunnel_fini' Fixes: a2225e0250c5 ("netfilter: move the sysctl nf_hooks_lwtunnel into the netfilter core") Reported-by: Mirsad Todorovac <mtodorovac69@gmail.com> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202406210511.8vbByYj3-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202406210520.6HmrUaA2-lkp@intel.com/ Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.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 reStructuredText 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.
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