From: Johannes Berg <johannes.b...@intel.com>
Looks like this is needed now, otherwise we get RCU
splats from lockdep. But I don't know anything about
this code ...
Signed-off-by: Johannes Berg <johannes.b...@intel.com>
---
arch/um/kernel/tlb.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index ad449173a1a1..3cc6b753e579 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -587,8 +587,10 @@ void flush_tlb_mm(struct mm_struct *mm)
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, mm, 0);
+ rcu_read_lock();
for_each_vma(vmi, vma)
fix_range(mm, vma->vm_start, vma->vm_end, 0);
+ rcu_read_unlock();
}
void force_flush_all(void)
@@ -597,6 +599,8 @@ void force_flush_all(void)
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, mm, 0);
+ rcu_read_lock();
for_each_vma(vmi, vma)
fix_range(mm, vma->vm_start, vma->vm_end, 1);
+ rcu_read_unlock();
}
--
2.37.3
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