Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplu...

[mirror_ubuntu-artful-kernel.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 6466699b16cbca1a26c8792f9d484925a23df005..033094ba62dce349a03345a4efe3a15b9bbe328e 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1940,7 +1940,7 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
 
        /* Check the cache first. */
        /* (Cache hit rate is typically around 35%.) */
-       vma = mm->mmap_cache;
+       vma = ACCESS_ONCE(mm->mmap_cache);
        if (!(vma && vma->vm_end > addr && vma->vm_start <= addr)) {
                struct rb_node *rb_node;
 
@@ -2305,7 +2305,7 @@ static void unmap_region(struct mm_struct *mm,
        update_hiwater_rss(mm);
        unmap_vmas(&tlb, vma, start, end);
        free_pgtables(&tlb, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS,
-                                next ? next->vm_start : 0);
+                                next ? next->vm_start : USER_PGTABLES_CEILING);
        tlb_finish_mmu(&tlb, start, end);
 }
 
@@ -2685,7 +2685,7 @@ void exit_mmap(struct mm_struct *mm)
        /* Use -1 here to ensure all VMAs in the mm are unmapped */
        unmap_vmas(&tlb, vma, 0, -1);
 
-       free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0);
+       free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, USER_PGTABLES_CEILING);
        tlb_finish_mmu(&tlb, 0, -1);
 
        /*