Commits
Alexey Kuznetsov authored and Pavel Emelianov committed 712f0e9b128
[CPT] Fix possible deadlock in checkpointing of mm Learned it wrong once and did not relearn. anon_vma lock cannot be taken under page table lock. And it is taken and should be taken in reversed order, cpt_mm even has a special hack due to wrong understanding: look at chunk converting ugly spin_trylock to spin_lock. Difference of previous version: in one case (does not happen normally, but yet), page table lock could remain locked. Bug #82785