Need to make the first few files without -j, othewise it barfs.  This is
a regression over 2.6.8.1 (sorry, don't know when it crept into the -mm
tree).  .config attached in case it matters.

cd ~/devel/kernel/.28758-linux-2.6.8.1-mm1.updated/
make -j5
  CHK     include/linux/version.h
  SYMLINK include/asm -> include/asm-i386
  UPD     include/linux/version.h
  SPLIT   include/linux/autoconf.h -> include/config/*
make: *** No rule to make target `.tmp_kallsyms2.S', needed by
`.tmp_kallsyms2.o'.  Stop.
make: *** Waiting for unfinished jobs....
make: *** Waiting for unfinished jobs....
make: *** Waiting for unfinished jobs....

Compilation exited abnormally with code 2 at Wed Aug 18 09:54:47

-- 
Anyone who quotes me in their signature is an idiot -- Rusty Russell