Message ID | 20210510165839.2692974-9-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 08/22] arch/m68k/kernel/sys_m68k: Use vma_lookup() in sys_cacheflush() Thread-Topic: [PATCH 08/22] arch/m68k/kernel/sys_m68k: Use vma_lookup() in sys_cacheflush() Thread-Index: AQHXRb3BcZoKDdv1cEy5AdB7DOWGIg== Date: Mon, 10 May 2021 16:58:52 +0000 Message-ID: <20210510165839.2692974-9-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: 3ad3770c-9b33-4209-14dc-08d913d4e3d7 x-ms-traffictypediagnostic: CO1PR10MB4769: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: <CO1PR10MB47695B3C36170A2E58F2208EFD549@CO1PR10MB4769.namprd10.prod.outlook.com> x-ms-oob-tlc-oobclassifiers: OLM:4941; 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mm: Add vma_lookup()
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On Mon, May 10, 2021 at 7:04 PM Liam Howlett <liam.howlett@oracle.com> wrote: > 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> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Gr{oetje,eeting}s, Geert
diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c index f55bdcb8e4f1..bd0274c7592e 100644 --- a/arch/m68k/kernel/sys_m68k.c +++ b/arch/m68k/kernel/sys_m68k.c @@ -402,8 +402,8 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) * to this process. */ mmap_read_lock(current->mm); - vma = find_vma(current->mm, addr); - if (!vma || addr < vma->vm_start || addr + len > vma->vm_end) + vma = vma_lookup(current->mm, addr); + if (!vma || addr + len > vma->vm_end) goto out_unlock; }
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> --- arch/m68k/kernel/sys_m68k.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)