[PATCH 17/41] mm/mmap: move VMA locking before anon_vma_lock_write call

[Suren Baghdasaryan]

Move VMA flag modification (which now implies VMA locking) before
anon_vma_lock_write to match the locking order of page fault handler.

Signed-off-by: Suren Baghdasaryan <sur...@google.com>
---
 mm/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index fa994ae903d9..53d885e70a54 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2953,13 +2953,13 @@ static int do_brk_flags(struct ma_state *mas, struct 
vm_area_struct *vma,
                if (mas_preallocate(mas, vma, GFP_KERNEL))
                        goto unacct_fail;
 
+               set_vm_flags(vma, VM_SOFTDIRTY);
                vma_adjust_trans_huge(vma, vma->vm_start, addr + len, 0);
                if (vma->anon_vma) {
                        anon_vma_lock_write(vma->anon_vma);
                        anon_vma_interval_tree_pre_update_vma(vma);
                }
                vma->vm_end = addr + len;
-               set_vm_flags(vma, VM_SOFTDIRTY);
                mas_store_prealloc(mas, vma);
 
                if (vma->anon_vma) {
-- 
2.39.0