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-rw-r--r--mm/mmu_context.c9
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);
}
/*