linux-kernel - Re: [PATCH tip/core/rcu 08/12] rcu: Disable TASKS

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Date:	Wed, 15 Jun 2016 23:47:42 +0200
From:	Richard Weinberger <richard@....at>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
	bobby.prani@...il.com, Jeff Dike <jdike@...toit.com>
Subject: Re: [PATCH tip/core/rcu 08/12] rcu: Disable TASKS_RCU for usermode
 Linux

Am 15.06.2016 um 23:46 schrieb Paul E. McKenney:
> Usermode Linux currently does not implement arch_irqs_disabled_flags(),
> which results in a build failure in TASKS_RCU.  Therefore, this commit
> disables the TASKS_RCU Kconfig option in usermode Linux builds.  The
> usermode Linux maintainers expect to merge arch_irqs_disabled_flags()
> into 4.8, at which point this commit may be reverted.
> 
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> Cc: Richard Weinberger <richard@....at>
> Cc: Jeff Dike <jdike@...toit.com>
> ---
>  init/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/init/Kconfig b/init/Kconfig
> index f755a602d4a1..a068265fbcaf 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -517,6 +517,7 @@ config SRCU
>  config TASKS_RCU
>  	bool
>  	default n
> +	depends on !UML
>  	select SRCU
>  	help
>  	  This option enables a task-based RCU implementation that uses

Acked-by: Richard Weinberger <richard@....at>

Thanks,
//richard