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From:   Liam Howlett <liam.howlett@oracle.com>
To:     "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>,
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        Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH 16/94] lib/test_hmm: Use vma_lookup() in dmirror_migrate()
Thread-Topic: [PATCH 16/94] lib/test_hmm: Use vma_lookup() in
 dmirror_migrate()
Thread-Index: AQHXPEQq8K5BkAo9t0u8GKSwaH+7Lw==
Date:   Wed, 28 Apr 2021 15:35:50 +0000
Message-ID: <20210428153542.2814175-17-Liam.Howlett@Oracle.com>
References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com>
In-Reply-To: <20210428153542.2814175-1-Liam.Howlett@Oracle.com>
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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>
---
 lib/test_hmm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

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,
=20
 	mmap_read_lock(mm);
 	for (addr =3D start; addr < end; addr =3D next) {
-		vma =3D find_vma(mm, addr);
-		if (!vma || addr < vma->vm_start ||
-		    !(vma->vm_flags & VM_READ)) {
+		vma =3D vma_lookup(mm, addr);
+		if (!vma || !(vma->vm_flags & VM_READ)) {
 			ret =3D -EINVAL;
 			goto out;
 		}
--=20
2.30.2