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authorSteven J. Magnani <steve@digidescorp.com>2010-03-05 13:42:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-06 11:26:27 -0800
commitc08c6e1f54c85fc299cf9f88cf330d6dd28a9a1d (patch)
treeb03659b467641e445b9f4a96423fd20ff806b7fb /mm
parentf047f4f3792344901e1ea18a180515d7d5349e02 (diff)
downloadconfigs-c08c6e1f54c85fc299cf9f88cf330d6dd28a9a1d.tar.gz
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 <steve@digidescorp.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/nommu.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index 55727a74af9..b9b5cceb1b6 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -146,7 +146,7 @@ int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
(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 @@ EXPORT_SYMBOL(find_vma);
*/
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);
}
/*