diff options
Diffstat (limited to 'mm/mmu_context.c')
| -rw-r--r-- | mm/mmu_context.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/mmu_context.c b/mm/mmu_context.c index fd473b51c903..ded9081f4021 100644 --- a/mm/mmu_context.c +++ b/mm/mmu_context.c @@ -26,13 +26,16 @@ void use_mm(struct mm_struct *mm) task_lock(tsk); active_mm = tsk->active_mm; - atomic_inc(&mm->mm_count); + if (active_mm != mm) { + atomic_inc(&mm->mm_count); + tsk->active_mm = mm; + } tsk->mm = mm; - tsk->active_mm = mm; switch_mm(active_mm, mm, tsk); task_unlock(tsk); - mmdrop(active_mm); + if (active_mm != mm) + mmdrop(active_mm); } /* |