Re: linux-next: build failure after merge of the rcu tree

Paul E. McKenney
2020-04-05T03:10:36Z

On Sun, Apr 05, 2020 at 11:49:59AM +1000, Stephen Rothwell wrote:
> Hi all,
>
> After merging the rcu tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
>
> kernel/trace/ftrace.c: In function 'ftrace_shutdown':
> kernel/trace/ftrace.c:2924:3: error: implicit declaration of function 'synchronize_rcu_tasks_rude'; did you mean 'synchronize_rcu_tasks'? [-Werror=implicit-function-declaration]
> 2924 | synchronize_rcu_tasks_rude();
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~
> | synchronize_rcu_tasks
>
> Caused by commit
>
> 59377f3e06b8 ("ftrace: Use synchronize_rcu_tasks_rude() instead of ftrace_sync()")
>
> synchronize_rcu_tasks_rude() is only declared when
> CONFIG_TASKS_RCU_GENERIC is defined.
>
> I have reverted that commit for today.
>
> Just asking: are all the commits currently in the rcu tree actually
> intended for v5.7?

My bad! I have moved rcu/next to where it need to be for the duration
of the merge window. Please accept my apologies for the hassle.

Thanx, Paul