Title: [6183] trunk/mm/nommu.c: Fix bug [#4948], the trail page is not be protected cause shm not work with MPU.
- Revision
- 6183
- Author
- gyang
- Date
- 2009-03-17 03:40:45 -0500 (Tue, 17 Mar 2009)
Log Message
Fix bug [#4948], the trail page is not be protected cause shm not work with MPU.
Modified Paths
Diff
Modified: trunk/mm/nommu.c (6182 => 6183)
--- trunk/mm/nommu.c 2009-03-17 06:06:39 UTC (rev 6182)
+++ trunk/mm/nommu.c 2009-03-17 08:40:45 UTC (rev 6183)
@@ -430,12 +430,12 @@
long len = vma->vm_end - vma->vm_start;
#ifdef CONFIG_MPU
- while (len > 0) {
- len -= PAGE_SIZE;
- protect_page(mm, vma->vm_start + len, 0);
+ long start = vma->vm_start;
+ while (start < vma->vm_end) {
+ protect_page(mm, start, vma->vm_flags);
+ start += PAGE_SIZE;
}
update_protections(mm);
- len = vma->vm_end - vma->vm_start;
#endif
if (vma->vm_flags & VM_SPLIT_PAGES)
@@ -460,10 +460,10 @@
struct vm_area_struct *vma = vml->vma;
#ifdef CONFIG_MPU
- long len = vma->vm_end - vma->vm_start;
- while (len > 0) {
- len -= PAGE_SIZE;
- protect_page(mm, vma->vm_start + len, vma->vm_flags);
+ long start = vma->vm_start;
+ while (start < vma->vm_end) {
+ protect_page(mm, start, vma->vm_flags);
+ start += PAGE_SIZE;
}
update_protections(mm);
#endif
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