--- mm/mlock.c

+++ mm/mlock.c

@@ -138,13 +138,6 @@ 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

@@ -177,12 +170,6 @@ static long __mlock_vma_pages_range(stru

if (vma->vm_flags & VM_WRITE)

gup_flags |= FOLL_WRITE;

- /* We don't try to access the guard page of a stack vma */

- if (stack_guard_page(vma, start)) {

- addr += PAGE_SIZE;

- nr_pages--;

- }

-

while (nr_pages > 0) {

int i;