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The ethernet support now calls directly into the ipv6 core code, which fails if IPV6 is a loadable module but mlx5 is built-in: drivers/net/ethernet/mellanox/mlx5/core/en_tc.o: In function `mlx5e_create_encap_header_ipv6': en_tc.c:(.text.mlx5e_create_encap_header_ipv6+0x110): undefined reference to `ip6_route_output_flags' This adds a dependency to ensure that MLX5_CORE_EN can only be built if we are able link the kernel successfully. The downside is that the ethernet option can be hidden. Alternatively we could make MLX5_CORE depend on "IPV6 || !IPV6", which would force MLX5_CORE to be a module when IPV6 is, including in configurations where we don't use the ethernet support at all. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.