From c08c6e1f54c85fc299cf9f88cf330d6dd28a9a1d Mon Sep 17 00:00:00 2001 From: "Steven J. Magnani" Date: Fri, 5 Mar 2010 13:42:24 -0800 Subject: [PATCH] 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 Acked-by: Paul Mundt Cc: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/nommu.c | 4 ++-- 1 file 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); } /* -- 2.41.0