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authorJohannes Berg2022-10-18 12:49:49 +0200
committerRichard Weinberger2023-02-01 22:11:27 +0100
commit3271e27bba90f676fa530592ba8ec9fe51938abf (patch)
tree0e2af14e3838983e056f33518d8fd4ab28a5bd6e /arch
parente0820368d0101452a9a35c903a549b7f32a6edff (diff)
um: protect VMA iteration
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/um/kernel/tlb.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index ad449173a1a1..fa43bcd9ba0b 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -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);
}