linux-kernel - [PATCH v13 29/70] mm/mmap: change do_brk_munmap() to use do_mas_align

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Date:   Mon, 22 Aug 2022 15:05:19 +0000
From:   Liam Howlett <liam.howlett@...cle.com>
To:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Liam Howlett <liam.howlett@...cle.com>
Subject: [PATCH v13 29/70] mm/mmap: change do_brk_munmap() to use
 do_mas_align_munmap()

From: "Liam R. Howlett" <Liam.Howlett@...cle.com>

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 <Liam.Howlett@...cle.com>
---
 mm/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 1c90a58b9cd8..64d12dd9d234 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3042,7 +3042,7 @@ static int do_brk_munmap(struct ma_state *mas, struct vm_area_struct *vma,
 	int ret;
 
 	arch_unmap(mm, newbrk, oldbrk);
-	ret = do_mas_munmap(mas, mm, newbrk, oldbrk-newbrk, uf, true);
+	ret = do_mas_align_munmap(mas, vma, mm, newbrk, oldbrk, uf, true);
 	validate_mm_mt(mm);
 	return ret;
 }
-- 
2.35.1