From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Thu, 8 Apr 2021 20:20:21 +0000 (-0400)
Subject: lib/test_hmm: Use vma_lookup() in dmirror_migrate()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=7644a46b611ca4a27e96c23b04bd4d457f72c8eb;p=users%2Fjedix%2Flinux-maple.git

lib/test_hmm: Use vma_lookup() in dmirror_migrate()

vma_lookup() will only return the vma which contains the address and
will not return the next vma.  This allows the code to easier to
understand.

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

diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index 80a78877bd93..15f2e2db77bc 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -686,9 +686,8 @@ static int dmirror_migrate(struct dmirror *dmirror,
 
 	mmap_read_lock(mm);
 	for (addr = start; addr < end; addr = next) {
-		vma = find_vma(mm, addr);
-		if (!vma || addr < vma->vm_start ||
-		    !(vma->vm_flags & VM_READ)) {
+		vma = vma_lookup(mm, addr);
+		if (!vma || !(vma->vm_flags & VM_READ)) {
 			ret = -EINVAL;
 			goto out;
 		}