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SubjectRe: RCU: undefined reference to irq_work_queue
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On 3/17/22 10:36, Paul E. McKenney wrote:
> On Thu, Mar 17, 2022 at 04:45:11PM +0000, Hyeonggon Yoo wrote:
>> On Thu, Mar 17, 2022 at 09:20:33AM -0700, Paul E. McKenney wrote:
>>> On Thu, Mar 17, 2022 at 03:24:42PM +0000, Hyeonggon Yoo wrote:
>>>> On Thu, Mar 17, 2022 at 07:00:00AM -0700, Paul E. McKenney wrote:
>>>>> On Thu, Mar 17, 2022 at 11:32:53AM +0000, Hyeonggon Yoo wrote:
>>>>>> Hello RCU folks,
>>>>>>

> ------------------------------------------------------------------------
>
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 678a80713b21..66c5b5543511 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -38,6 +38,7 @@ config KPROBES
> depends on MODULES
> depends on HAVE_KPROBES
> select KALLSYMS
> + select TASKS_RCU if PREEMPTION
> help
> Kprobes allows you to trap at almost any kernel address and
> execute a callback function. register_kprobe() establishes
> diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig
> index f559870fbf8b..4f665ae0cf55 100644
> --- a/kernel/rcu/Kconfig
> +++ b/kernel/rcu/Kconfig
> @@ -78,7 +78,8 @@ config TASKS_RCU_GENERIC
> task-based RCU implementations. Not for manual selection.
>
> config TASKS_RCU
> - def_bool PREEMPTION
> + def_bool 0

preferably
def_bool n

but the 0 probably works... :)

> + select IRQ_WORK
> help
> This option enables a task-based RCU implementation that uses
> only voluntary context switch (not preemption!), idle, and
> diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> index 752ed89a293b..a7aaf150b704 100644
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -127,6 +127,7 @@ config TRACING
> select BINARY_PRINTF
> select EVENT_TRACING
> select TRACE_CLOCK
> + select TASKS_RCU if PREEMPTION
>
> config GENERIC_TRACER
> bool

--
~Randy

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