From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Tue, 1 Dec 2020 02:30:04 +0000 (-0500)
Subject: mm/mmap: Change do_brk_munmap() to use do_mas_align_munmap()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=79a1964efc05f900d3262a403d462232ba35a758;p=users%2Fjedix%2Flinux-maple.git

mm/mmap: Change do_brk_munmap() to use do_mas_align_munmap()

do_brk_munmap() already has aligned addresses.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---

diff --git a/mm/mmap.c b/mm/mmap.c
index 5878c7d06088..25e3cf0327ff 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2991,15 +2991,12 @@ 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)
-		mas_set(mas, newbrk);
-		if (vma->vm_start != newbrk)
-			mas_reset(mas); // cause a re-walk for the first overlap.
-		ret = do_mas_munmap(mas, mm, newbrk, oldbrk-newbrk, uf, true);
+		ret = do_mas_align_munmap(mas, vma, mm, newbrk, oldbrk, uf, true);
 		goto munmap_full_vma;
 	}