nommu: get_user_pages(): pin last page on non-page-aligned start
The noMMU version of get_user_pages() fails to pin the last page when the
start address isn't page-aligned. The patch fixes this in a way that
makes find_extend_vma() congruent to its MMU cousin.
Signed-off-by: Steven J. Magnani <[email protected]>
Acked-by: Paul Mundt <[email protected]>
Cc: David Howells <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
diff --git a/mm/nommu.c b/mm/nommu.c
index 55727a7..b9b5cceb 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -146,7 +146,7 @@
(VM_MAYREAD | VM_MAYWRITE) : (VM_READ | VM_WRITE);
for (i = 0; i < nr_pages; i++) {
- vma = find_vma(mm, start);
+ vma = find_extend_vma(mm, start);
if (!vma)
goto finish_or_fault;
@@ -764,7 +764,7 @@
*/
struct vm_area_struct *find_extend_vma(struct mm_struct *mm, unsigned long addr)
{
- return find_vma(mm, addr);
+ return find_vma(mm, addr & PAGE_MASK);
}
/*
