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authorStefan Bader <stefan.bader@canonical.com>2010-08-31 15:52:27 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-10-28 21:51:47 -0700
commit5daf133f0fb96925541cb5bf82317793a75c19f9 (patch)
tree08bd5fe4f19496b5888ab140e7181682d6744970 /include
parente4037861387fe89ac082e8cf092b6a7bada09cb5 (diff)
mm: Move vma_stack_continue into mm.h
commit 39aa3cb3e8250db9188a6f1e3fb62ffa1a717678 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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 c1f54d2c63d0..a724d896a38f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -863,6 +863,12 @@ 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);