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authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-12 10:23:59 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-12 10:23:59 -0800
commit67549d46d42eed58731028bebe304bc8cbd7af01 (patch)
treea0f5f7664ae96d3f0ce693f46987a820539dcae5
parent02776b9b5399183f273fa898fef64b1e977a5f85 (diff)
parent541676078b52f365f53d46ee5517d305cd1b6350 (diff)
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar: "A Kconfig fix, a build fix and a membarrier bug fix" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: membarrier: Disable preemption when calling smp_call_function_many() sched/isolation: Make CONFIG_CPU_ISOLATION=y depend on SMP or COMPILE_TEST ia64, sched/cputime: Fix build error if CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y
-rw-r--r--arch/ia64/kernel/time.c2
-rw-r--r--init/Kconfig1
-rw-r--r--kernel/sched/membarrier.c2
3 files changed, 4 insertions, 1 deletions
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index c6ecb97151a2..9025699049ca 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -88,7 +88,7 @@ void vtime_flush(struct task_struct *tsk)
}
if (ti->softirq_time) {
- delta = cycle_to_nsec(ti->softirq_time));
+ delta = cycle_to_nsec(ti->softirq_time);
account_system_index_time(tsk, delta, CPUTIME_SOFTIRQ);
}
diff --git a/init/Kconfig b/init/Kconfig
index 19a6b845d834..a9a2e2c86671 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -461,6 +461,7 @@ endmenu # "CPU/Task time and stats accounting"
config CPU_ISOLATION
bool "CPU isolation"
+ depends on SMP || COMPILE_TEST
default y
help
Make sure that CPUs running critical tasks are not disturbed by
diff --git a/kernel/sched/membarrier.c b/kernel/sched/membarrier.c
index dd7908743dab..9bcbacba82a8 100644
--- a/kernel/sched/membarrier.c
+++ b/kernel/sched/membarrier.c
@@ -89,7 +89,9 @@ static int membarrier_private_expedited(void)
rcu_read_unlock();
}
if (!fallback) {
+ preempt_disable();
smp_call_function_many(tmpmask, ipi_mb, NULL, 1);
+ preempt_enable();
free_cpumask_var(tmpmask);
}
cpus_read_unlock();