From 445a2ea0ef0e0e69812218b2c896a23443466625 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" <Liam.Howlett@oracle.com> Date: Mon, 24 Jul 2023 14:31:46 -0400 Subject: [PATCH] mm: remove prev check from do_vmi_align_munmap() 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. Link: https://lkml.kernel.org/r/20230724183157.3939892-5-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Peng Zhang <zhangpeng.00@bytedance.com> Cc: Suren Baghdasaryan <surenb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- mm/mmap.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index 5212a0b66b8f1..5fbc7d71d60c6 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2459,8 +2459,6 @@ 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 -- GitLab