Add vma_is_stack() and vma_is_heap() helper and use them to
simplify code.

Kefeng Wang (5):
  mm: introduce vma_is_stack() and vma_is_heap()
  mm: use vma_is_stack() and vma_is_heap()
  drm/amdkfd: use vma_is_stack() and vma_is_heap()
  selinux: use vma_is_stack() and vma_is_heap()
  perf/core: use vma_is_stack() and vma_is_heap()

 drivers/gpu/drm/amd/amdkfd/kfd_svm.c |  5 +----
 fs/proc/task_mmu.c                   | 24 ++++--------------------
 fs/proc/task_nommu.c                 | 15 +--------------
 include/linux/mm.h                   | 12 ++++++++++++
 kernel/events/core.c                 | 22 +++++++---------------
 security/selinux/hooks.c             |  7 ++-----
 6 files changed, 27 insertions(+), 58 deletions(-)

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2.41.0