From 1d3acd02779ece687368b48a0ec2c4933649a948 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Mon, 30 Nov 2020 21:30:04 -0500 Subject: [PATCH] mm/mmap: Change do_brk_munmap() to use do_mas_align_munmap() do_brk_munmap() has already aligned the address and has a maple tree state to be used. Use the new do_mas_align_munmap() to avoid unnecessary alignment and error checks. Signed-off-by: Liam R. Howlett --- mm/mmap.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index 84673dafc2c7..ca7049e46ecb 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2967,12 +2967,16 @@ static int do_brk_munmap(struct ma_state *mas, struct vm_area_struct *vma, struct mm_struct *mm = vma->vm_mm; struct vm_area_struct unmap; unsigned long unmap_pages; - int ret = 1; + int ret; arch_unmap(mm, newbrk, oldbrk); - if (likely(vma->vm_start >= newbrk)) { // remove entire mapping(s) - ret = do_mas_munmap(mas, mm, newbrk, oldbrk-newbrk, uf, true); + if (likely((vma->vm_end < oldbrk) || + ((vma->vm_start == newbrk) && (vma->vm_end == oldbrk)))) { + // remove entire mapping(s) + mas->last = oldbrk - 1; + ret = do_mas_align_munmap(mas, vma, mm, newbrk, oldbrk, uf, + true); goto munmap_full_vma; } -- 2.50.1