4.14.36-grsec-201804240730

  LD      vmlinux.o
  MODPOST vmlinux.o
WARNING: modpost: Found 1661 writable function pointers.
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
  LD      vmlinux
kernel/fork.o: In function `__mmdrop':
(.text+0x6f6): undefined reference to `hmm_mm_destroy'
Makefile:1026: recipe for target 'vmlinux' failed
make[1]: *** [vmlinux] Error 1