[PATCH 0/2] Fix compound_head() race

[Kirill A. Shutemov]

Here's my attempt on fixing recently discovered race in compound_head().
It should make compound_head() reliable in all contexts.

The patchset is against Linus' tree. Let me know if it need to be rebased
onto different baseline.

It's expected to have conflicts with my page-flags patchset and probably
should be applied before it.

Kirill A. Shutemov (2):
  zsmalloc: use page->private instead of page->first_page
  mm: make compound_head() robust

 Documentation/vm/split_page_table_lock |  4 +-
 arch/xtensa/configs/iss_defconfig      |  1 -
 include/linux/mm.h                     | 53 ++--------------------
 include/linux/mm_types.h               | 15 ++++---
 include/linux/page-flags.h             | 80 ++++++++--------------------------
 mm/Kconfig                             | 12 -----
 mm/debug.c                             |  7 ---
 mm/hugetlb.c                           |  8 +---
 mm/internal.h                          |  4 +-
 mm/memory-failure.c                    |  7 ---
 mm/page_alloc.c                        | 36 +++++++--------
 mm/swap.c                              |  4 +-
 mm/zsmalloc.c                          | 11 +++--
 13 files changed, 61 insertions(+), 181 deletions(-)

-- 
2.5.0

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