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authorStefan Bader <stefan.bader@canonical.com>2010-08-31 15:52:27 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2010-09-09 09:05:06 -0700
commit39aa3cb3e8250db9188a6f1e3fb62ffa1a717678 (patch)
tree266640c10436e9bda9bc283fbe5db22761a7cc7c /include
parent26a94e81ded0fcdc0bf96b5fea7343311f1a220b (diff)
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mm: Move vma_stack_continue into mm.h
So it can be used by all that need to check for that. Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e6b1210772c..74949fbef8c 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -864,6 +864,12 @@ int set_page_dirty(struct page *page);
int set_page_dirty_lock(struct page *page);
int clear_page_dirty_for_io(struct page *page);
+/* Is the vma a continuation of the stack vma above it? */
+static inline int vma_stack_continue(struct vm_area_struct *vma, unsigned long addr)
+{
+ return vma && (vma->vm_end == addr) && (vma->vm_flags & VM_GROWSDOWN);
+}
+
extern unsigned long move_page_tables(struct vm_area_struct *vma,
unsigned long old_addr, struct vm_area_struct *new_vma,
unsigned long new_addr, unsigned long len);