On 6/6/19 6:36 PM, Matteo Croce wrote: > Some sysctl related code and data structures is never referenced > when CONFIG_SYSCTL is not set. > While this is usually harmless, it produces a build failure since sysctl > shared variables exists, due to missing sysctl_vals symbol: > > ld: net/mpls/af_mpls.o: in function `mpls_platform_labels': > af_mpls.c:(.text+0x162a): undefined reference to `sysctl_vals' > ld: net/mpls/af_mpls.o:(.rodata+0x830): undefined reference to > `sysctl_vals' > ld: net/mpls/af_mpls.o:(.rodata+0x838): undefined reference to > `sysctl_vals' > ld: net/mpls/af_mpls.o:(.rodata+0x870): undefined reference to > `sysctl_vals' > > Fix this by moving all sysctl related code under #ifdef CONFIG_SYSCTL > > Reported-by: Randy Dunlap <rdun...@infradead.org> > Signed-off-by: Matteo Croce <mcr...@redhat.com> > --- > > v1 -> v2: fix a crash on netns destroy > > net/mpls/af_mpls.c | 393 ++++++++++++++++++++++++--------------------- > 1 file changed, 207 insertions(+), 186 deletions(-) >
As I recall you need to set platform_labels for the mpls code to even work, so building mpls_router without sysctl is pointless.
