From: Liam R. Howlett Date: Mon, 24 Jul 2023 18:31:46 +0000 (-0400) Subject: mm: remove prev check from do_vmi_align_munmap() X-Git-Tag: v6.6.7~1970^2~292 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=445a2ea0ef0e0e69812218b2c896a23443466625;p=platform%2Fkernel%2Flinux-starfive.git 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 Cc: Peng Zhang Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton --- diff --git a/mm/mmap.c b/mm/mmap.c index 5212a0b..5fbc7d7 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