[PATCH 05/14] mm: Remove prev check from do_vmi_align_munmap()

From: Liam R. Howlett
Date: Wed May 31 2023 - 22:17:01 EST

If the prev does not exist, the vma iterator will be set to MAS_NONE,
which will be treated as a MAS_START when the mas_next or mas_find is
used. In this case, the next caller will be the vma iterator, which
uses mas_find() under the hood and will now do what the user expects.

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

diff --git a/mm/mmap.c b/mm/mmap.c
index 8e5563668b18..fd3f505b40cc 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2402,8 +2402,6 @@ do_vmi_align_munmap(struct vma_iterator *vmi, struct vm_area_struct *vma,

prev = vma_prev(vmi);
- if (unlikely((!prev)))
- vma_iter_set(vmi, start);

* Detach a range of VMAs from the mm. Using next as a temp variable as