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SubjectRe: [rcu:rcu/next 25/36] include/linux/irqflags.h:79:3: error: implicit declaration of function 'arch_irqs_disabled_flags'
On Wed, Jun 15, 2016 at 09:05:37AM +0200, Richard Weinberger wrote:
> Paul,
>
> Am 15.06.2016 um 00:54 schrieb Paul E. McKenney:
> > On Mon, Jun 06, 2016 at 02:04:03AM +0800, kbuild test robot wrote:
> >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
> >> head: 13ee0de9cd2444b57ce30c4f1607b49b90aa0c38
> >> commit: f251ac814fc5787765009e60d54a2bd4277350c8 [25/36] rcu: Make call_rcu_tasks() tolerate first call with irqs disabled
> >> config: um-allmodconfig (attached as .config)
> >> compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
> >> reproduce:
> >> git checkout f251ac814fc5787765009e60d54a2bd4277350c8
> >> # save the attached .config to linux build tree
> >> make ARCH=um
> >
> > My kneejerk reaction would be to make CONFIG_TASKS_RCU depend on
> > !UML or something similar.
> >
> > Another approach would be create a arch_irqs_disabled_flags() for UML.
> >
> > Any preferences?
>
> Patches for arch_irqs_disabled_flags() support are already on LKML:
> https://lkml.org/lkml/2016/6/12/162
>
> My plan was to merge them in the v4.8 merge window.
> So having CONFIG_TASKS_RCU depend on !UML for now should be fine.
> We can remove the dependency in v4.8 again.

Sounds very good, thank you!

Thanx, Paul

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