rtc: fix coh901331 startup crash

[pandora-kernel.git] / mm / mlock.c

diff --git a/mm/mlock.c b/mm/mlock.c
index c3924c7..6b55e3e 100644 (file)
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -135,13 +135,6 @@ void munlock_vma_page(struct page *page)
        }
 }
 
-static inline int stack_guard_page(struct vm_area_struct *vma, unsigned long addr)
-{
-       return (vma->vm_flags & VM_GROWSDOWN) &&
-               (vma->vm_start == addr) &&
-               !vma_stack_continue(vma->vm_prev, addr);
-}
-
 /**
  * __mlock_vma_pages_range() -  mlock a range of pages in the vma.
  * @vma:   target vma
@@ -188,12 +181,6 @@ static long __mlock_vma_pages_range(struct vm_area_struct *vma,
        if (vma->vm_flags & VM_LOCKED)
                gup_flags |= FOLL_MLOCK;
 
-       /* We don't try to access the guard page of a stack vma */
-       if (stack_guard_page(vma, start)) {
-               addr += PAGE_SIZE;
-               nr_pages--;
-       }
-
        return __get_user_pages(current, mm, addr, nr_pages, gup_flags,
                                NULL, NULL, nonblocking);
 }
@@ -237,7 +224,7 @@ long mlock_vma_pages_range(struct vm_area_struct *vma,
 
        if (!((vma->vm_flags & (VM_DONTEXPAND | VM_RESERVED)) ||
                        is_vm_hugetlb_page(vma) ||
-                       vma == get_gate_vma(current))) {
+                       vma == get_gate_vma(current->mm))) {
 
                __mlock_vma_pages_range(vma, start, end, NULL);
 
@@ -332,7 +319,7 @@ static int mlock_fixup(struct vm_area_struct *vma, struct vm_area_struct **prev,
        int lock = newflags & VM_LOCKED;
 
        if (newflags == vma->vm_flags || (vma->vm_flags & VM_SPECIAL) ||
-           is_vm_hugetlb_page(vma) || vma == get_gate_vma(current))
+           is_vm_hugetlb_page(vma) || vma == get_gate_vma(current->mm))
                goto out;       /* don't set VM_LOCKED,  don't count */
 
        pgoff = vma->vm_pgoff + ((start - vma->vm_start) >> PAGE_SHIFT);