Message ID | 20210510165839.2692974-16-Liam.Howlett@Oracle.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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McKenney" <paulmck@kernel.org>, Matthew Wilcox <willy@infradead.org>, Laurent Dufour <ldufour@linux.ibm.com>, David Rientjes <rientjes@google.com>, Axel Rasmussen <axelrasmussen@google.com>, Suren Baghdasaryan <surenb@google.com>, Vlastimil Babka <vbabka@suse.cz>, Rik van Riel <riel@surriel.com>, Peter Zijlstra <peterz@infradead.org>, 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> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.30.2 x-originating-ip: [23.233.25.87] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 7f288ebf-7ca9-48e7-d58e-08d913d4e5f4 x-ms-traffictypediagnostic: MWHPR10MB1437: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: <MWHPR10MB14376143B37A87BD76F34D03FD549@MWHPR10MB1437.namprd10.prod.outlook.com> x-ms-oob-tlc-oobclassifiers: OLM:4714; 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mm: Add vma_lookup()
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expand
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diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.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; - vma = find_vma(current->mm, vaddr); - if (vma && vma->vm_start <= vaddr && vma->vm_ops == &gru_vm_ops) + vma = vma_lookup(current->mm, vaddr); + if (vma && vma->vm_ops == &gru_vm_ops) return vma; return NULL; }
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(-)