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um: protect VMA iteration

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Due to changes in the iteration, there are now lockdep
checks indicating that we're missing locking here. Add
the missing locking where it's needed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Johannes Berg 2022-10-18 12:49:49 +02:00 committed by Richard Weinberger
parent e0820368d0
commit 3271e27bba
1 changed files with 2 additions and 0 deletions
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2
arch/um/kernel/tlb.c
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@ -597,6 +597,8 @@ void force_flush_all(void)
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, mm, 0);
mmap_read_lock(mm);
for_each_vma(vmi, vma)
fix_range(mm, vma->vm_start, vma->vm_end, 1);
mmap_read_unlock(mm);
}