Re: [rcu:fixes.2012.07.06a 12/19] undefined reference to `rcu_is_cpu_idle'

Dan Carpenter
2012-07-08T08:57:52Z

I don't know that the wfg@linux.intel.com email address works.

I added it it in the last thread an Fengguang said it only failed
because of a fluke. I insisted that it still wasn't working. But
I see now that Fengguang removed the working email address from
the list so my reply never got through.

Fengguang please leave your working email address on the CC list.

regards,
dan carpenter

On Sat, Jul 07, 2012 at 02:54:42PM -0700, Paul E. McKenney wrote:
> On Sun, Jul 08, 2012 at 01:18:03AM +0800, wfg@linux.intel.com wrote:
> > Hi Paul,
> >
> > Kernel build failed on
> >
> > tree: git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git fixes.2012.07.06a
> > head: cfca927972e31a5b3da49bf641c525732ff3c357
> > commit: 62fde6edf12b60fddb13a3f0a779c8be0bb7447e [12/19] rcu: Make __call_rcu() handle invocation from idle
> > config: x86_64-randconfig-tip4 (attached as .config)
> >
> >
> > kernel/built-in.o: In function `rcu_read_lock_bh_held': (.text+0x167d1): undefined reference to `rcu_is_cpu_idle'
> > kernel/built-in.o: In function `lockdep_rcu_suspicious': (.text+0x367e8): undefined reference to `rcu_is_cpu_idle'
> > kernel/built-in.o: In function `lockdep_rcu_suspicious': (.text+0x36815): undefined reference to `rcu_is_cpu_idle'
> > kernel/built-in.o: In function `css_get_next': (.text+0x40f5a): undefined reference to `rcu_is_cpu_idle'
> > drivers/built-in.o: In function `dst_link_failure': isdn_net.c:(.text+0x13950a): undefined reference to `rcu_is_cpu_idle'
> > net/built-in.o:sock.c:(.text+0x3cec): more undefined references to `rcu_is_cpu_idle' follow
> >
> > There are more similar errors in the other randconfigs.
>
> Hmmm... So you are building TINY_RCU without CONFIG_DEBUG_LOCK_ALLOC,
> but with some checking enabled. I -thought- I was testing that...
>
> But, wait. You do have CONFIG_DEBUG_LOCK_ALLOC defined. That really
> should cause rcu_is_cpu_idle() to be compiled into kernel/rcupdate.o.
> And your config builds on my system with no errors.
>
> Was there perhaps another problem, maybe running out of disk space?
>
> Thanx, Paul
>
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