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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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        Michel Lespinasse <michel@lespinasse.org>,
        Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH 15/22] misc/sgi-gru/grufault: Use vma_lookup() in
 gru_find_vma()
Thread-Topic: [PATCH 15/22] misc/sgi-gru/grufault: Use vma_lookup() in
 gru_find_vma()
Thread-Index: AQHXRb3DbZrpe6RAZE6feBS7use0Lw==
Date:   Mon, 10 May 2021 16:58:56 +0000
Message-ID: <20210510165839.2692974-16-Liam.Howlett@Oracle.com>
References: <20210510165839.2692974-1-Liam.Howlett@Oracle.com>
In-Reply-To: <20210510165839.2692974-1-Liam.Howlett@Oracle.com>
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Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 drivers/misc/sgi-gru/grufault.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufaul=
t.c
index 723825524ea0..d7ef61e602ed 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -49,8 +49,8 @@ struct vm_area_struct *gru_find_vma(unsigned long vaddr)
 {
 	struct vm_area_struct *vma;
=20
-	vma =3D find_vma(current->mm, vaddr);
-	if (vma && vma->vm_start <=3D vaddr && vma->vm_ops =3D=3D &gru_vm_ops)
+	vma =3D vma_lookup(current->mm, vaddr);
+	if (vma && vma->vm_ops =3D=3D &gru_vm_ops)
 		return vma;
 	return NULL;
 }
--=20
2.30.2