linux-kernel - Re: [paulmck-rcu:fastexp.2022.04.01a] BUILD REGRESSION d9f3e7d671416fdf5b61f094765754269b652db0

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Date:   Mon, 04 Apr 2022 13:40:41 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
To:     paulmck@...nel.org, kernel test robot <lkp@...el.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [paulmck-rcu:fastexp.2022.04.01a] BUILD REGRESSION
 d9f3e7d671416fdf5b61f094765754269b652db0

"Paul E. McKenney" <paulmck@...nel.org> writes:

> On Sat, Apr 02, 2022 at 11:43:01PM +0800, kernel test robot wrote:
>> tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git fastexp.2022.04.01a
>> branch HEAD: d9f3e7d671416fdf5b61f094765754269b652db0  EXP rcu: Move expedited grace period (GP) work to RT kthread_worker
>> 
>> Error/Warning reports:
>> 
>> https://lore.kernel.org/lkml/202204021454.WDwBbwVL-lkp@intel.com
>> 
>> Error/Warning: (recently discovered and may have been fixed)
>> 
>> arch/powerpc/include/asm/book3s/64/pgtable-64k.h:60:1: error: no return statement in function returning non-void
>
> Adding Aneesh on CC.  My kneejerk reaction would be to add a
> "return 0" to this function, but there might be a reason why it
> looks like this:

yes, that should work. Do you want me to send a patch for this? Or will
it get folded with other changes?

>
> 	/*
> 	 * This should never get called
> 	 */
> 	static inline int get_hugepd_cache_index(int index)
> 	{
> 		BUG();
> 	}
>
> Working on the other problem with RCU's Kconfig options.
>

-aneesh