Andreas Schwab wrote:
>> David Miller (3):
>>       lockdep: fix combinatorial explosion in lock subgraph traversal
> 
> lockdep_count_forward_deps is only defined if CONFIG_PROVE_LOCKING but
> used unconditionally in lockdep_proc.c.
> 
> kernel/built-in.o: In function `.lockdep_stats_show':
> lockdep_proc.c:(.text+0x3fea8): undefined reference to `.lockdep_count_forward_deps'
> kernel/built-in.o: In function `.l_show': 
> lockdep_proc.c:(.text+0x401f0): undefined reference to `.lockdep_count_forward_deps'
> lockdep_proc.c:(.text+0x40210): undefined reference to `.lockdep_count_backward_deps'

I have so far been unable to build -rc3 because of this same error.
Just tried again with current git HEAD. Failing config attached.

Cheers,
FJP