[PATCH 2/2] mm/mmap: Change detached vma locking scheme

[Liam R. Howlett]

Don't set the lock to the mm lock so that the detached VMA tree does not
complain about being unlocked when the mmap_lock is dropped prior to
freeing the tree.

Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
 mm/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 964a8aa59297..3bb5a4e1f4f1 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2426,7 +2426,7 @@ do_vmi_align_munmap(struct vma_iterator *vmi, struct =
vm_area_struct *vma,
 	unsigned long locked_vm =3D 0;
 	MA_STATE(mas_detach, &mt_detach, 0, 0);
 	mt_init_flags(&mt_detach, vmi->mas.tree->ma_flags & MT_FLAGS_LOCK_MASK);
-	mt_set_external_lock(&mt_detach, &mm->mmap_lock);
+	mt_detach.ma_external_lock =3D NULL;
=20
 	/*
 	 * If we need to split any vma, do it now to save pain later.
--=20
2.39.2


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