[PATCH 1/5] mm: introduce vma_is_stack() and vma_is_heap()

[Kefeng Wang]

Introduce the two helpers for general use.

Signed-off-by: Kefeng Wang <wangkefeng.wang at huawei.com>
---
 include/linux/mm.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1462cf15badf..0bbeb31ac750 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -926,6 +926,18 @@ static inline bool vma_is_anonymous(struct vm_area_struct *vma)
 	return !vma->vm_ops;
 }
 
+static inline bool vma_is_heap(struct vm_area_struct *vma)
+{
+       return vma->vm_start <= vma->vm_mm->brk &&
+		vma->vm_end >= vma->vm_mm->start_brk;
+}
+
+static inline bool vma_is_stack(struct vm_area_struct *vma)
+{
+       return vma->vm_start <= vma->vm_mm->start_stack &&
+	       vma->vm_end >= vma->vm_mm->start_stack;
+}
+
 static inline bool vma_is_temporary_stack(struct vm_area_struct *vma)
 {
 	int maybe_stack = vma->vm_flags & (VM_GROWSDOWN | VM_GROWSUP);
-- 
2.41.0