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| author |   Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2017-12-15 14:23:10 -0500 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-01-10 08:50:31 +0100 |
| commit | 541676078b52f365f53d46ee5517d305cd1b6350 (patch) | |
| tree | 603c8e044cdef67985f9eea138d6544f2e35437f /kernel | |
| parent | sched/isolation: Make CONFIG_CPU_ISOLATION=y depend on SMP or COMPILE_TEST (diff) | |
| download | linux-dev-541676078b52f365f53d46ee5517d305cd1b6350.tar.xz linux-dev-541676078b52f365f53d46ee5517d305cd1b6350.zip | |
membarrier: Disable preemption when calling smp_call_function_many()
smp_call_function_many() requires disabling preemption around the call.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: <stable@vger.kernel.org> # v4.14+
Cc: Andrea Parri <parri.andrea@gmail.com>
Cc: Andrew Hunter <ahh@google.com>
Cc: Avi Kivity <avi@scylladb.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Dave Watson <davejwatson@fb.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maged Michael <maged.michael@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171215192310.25293-1-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/membarrier.c | 2 |
1 files changed, 2 insertions, 0 deletions
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(); |