While building mpi.ko module with stable Linux v4.14.14 an error occured: >ERROR: "abort" [lib/mpi/mpi.ko] undefined! In upstream Linux 4.15 this issue is fixed: Commit 7c2c11b208be ("arch: define weak abort()") https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c2c11b208be09c156573fc0076b7b3646e05219 Commit dc8635b78cd8 ("kernel/exit.c: export abort() to modules") https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dc8635b78cd8669c37e230058d18c33af7451ab1 So lets add backport patches until these fixes are not applied in stable version. Signed-off-by: Evgeniy Didin <Evgeniy.Didin@synopsys.com> Cc: Alexey Brodkin <abrodkin@synopsys.com> CC: John Crispin <john@phrozen.org> CC: Hauke Mehrtens <hauke@hauke-m.de>