[patch 0/5] Various mm improvements.

While working on 1K/2K page tables for s390 I noticed room for
improvement in regard to some common mm code:
 - unnecessary tlb flushing in unmap_vmas
 - ptep_establish has fallen into disuse
 - ptep_test_and_clear_dirty / ptep_clear_flush_dirty are not used either
 - the definitions of mm_struct and vm_area_struct should be moved to
   mm_types.h
 - page_mkclean_one is giving false positives

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.

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• Follow-Ups:
  • [patch 4/5] move mm_struct and vm_area_struct.
    • From: Martin Schwidefsky <[email protected]>
  • [patch 5/5] Optimize page_mkclean_one
    • From: Martin Schwidefsky <[email protected]>
  • [patch 3/5] remove ptep_test_and_clear_dirty and ptep_clear_flush_dirty.
    • From: Martin Schwidefsky <[email protected]>
  • [patch 1/5] avoid tlb gather restarts.
    • From: Martin Schwidefsky <[email protected]>
  • [patch 2/5] remove ptep_establish.
    • From: Martin Schwidefsky <[email protected]>

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