The patch titled
nommu: get_user_pages(): pin last page on non-page-aligned start
has been added to the -mm tree. Its filename is
nommu-get_user_pages-pin-last-page-on-non-page-aligned-start.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: nommu: get_user_pages(): pin last page on non-page-aligned start
From: "Steven J. Magnani" <steve@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Acked-by: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/nommu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/nommu.c~nommu-get_user_pages-pin-last-page-on-non-page-aligned-start mm/nommu.c
--- a/mm/nommu.c~nommu-get_user_pages-pin-last-page-on-non-page-aligned-start
+++ a/mm/nommu.c
@@ -146,7 +146,7 @@ int __get_user_pages(struct task_struct
(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);
}
/*
_
Patches currently in -mm which might be from steve@xxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
nommu-get_user_pages-pin-last-page-on-non-page-aligned-start.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
