After recent change 'x' is only used when CONFIG_NETFILTER is set: net/ipv4/xfrm4_output.c: In function '__xfrm4_output': net/ipv4/xfrm4_output.c:19:21: warning: unused variable 'x' [-Wunused-variable] 19 | struct xfrm_state *x = skb_dst(skb)->xfrm; Expand the CONFIG_NETFILTER scope to avoid this. Fixes: 2ab6096db2f1 ("xfrm: remove output_finish indirection from xfrm_state_afinfo") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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.
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