diff options
Diffstat (limited to 'kernel/kthread.c')
| -rw-r--r-- | kernel/kthread.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index 1d9e2fdfd67a..1c8964feeb01 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -1241,13 +1241,16 @@ void kthread_use_mm(struct mm_struct *mm) WARN_ON_ONCE(tsk->mm); task_lock(tsk); + /* Hold off tlb flush IPIs while switching mm's */ + local_irq_disable(); active_mm = tsk->active_mm; if (active_mm != mm) { mmgrab(mm); tsk->active_mm = mm; } tsk->mm = mm; - switch_mm(active_mm, mm, tsk); + switch_mm_irqs_off(active_mm, mm, tsk); + local_irq_enable(); task_unlock(tsk); #ifdef finish_arch_post_lock_switch finish_arch_post_lock_switch(); @@ -1276,9 +1279,11 @@ void kthread_unuse_mm(struct mm_struct *mm) task_lock(tsk); sync_mm_rss(mm); + local_irq_disable(); tsk->mm = NULL; /* active_mm is still 'mm' */ enter_lazy_tlb(mm, tsk); + local_irq_enable(); task_unlock(tsk); } EXPORT_SYMBOL_GPL(kthread_unuse_mm); |