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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yuri Norov Make sure that kick_all_cpus_sync() does not call CPUs that are running isolated tasks. Signed-off-by: Yuri Norov [abelits@marvell.com: use safe task_isolation_cpumask() implementation] Signed-off-by: Alex Belits --- kernel/smp.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/kernel/smp.c b/kernel/smp.c index 6a6849783948..ff0d95db33b3 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -803,9 +803,21 @@ static void do_nothing(void *unused) */ void kick_all_cpus_sync(void) { + struct cpumask mask; + /* Make sure the change is visible before we kick the cpus */ smp_mb(); - smp_call_function(do_nothing, NULL, 1); + + preempt_disable(); +#ifdef CONFIG_TASK_ISOLATION + cpumask_clear(&mask); + task_isolation_cpumask(&mask); + cpumask_complement(&mask, &mask); +#else + cpumask_setall(&mask); +#endif + smp_call_function_many(&mask, do_nothing, NULL, 1); + preempt_enable(); } EXPORT_SYMBOL_GPL(kick_all_cpus_sync); -- 2.26.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel