mm/mmap: Zero maple tree area in a single set when detatching

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>

diff --git a/mm/mmap.c b/mm/mmap.c
index d176e0405111cf56f70682d72daa661ae466e83e..4444324151d046ebe30b2dccf4c168c8360a3d92 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2520,8 +2520,8 @@ detach_vmas_to_be_unmapped(struct mm_struct *mm, struct vm_area_struct *vma,
 
        insertion_point = (prev ? &prev->vm_next : &mm->mmap);
        vma->vm_prev = NULL;
+       vma_mt_szero(mm, vma->vm_start, end);
        do {
-               vma_mt_erase(mm, vma);
                mm->map_count--;
                tail_vma = vma;
                vma = vma->vm_next;