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Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.10.1 Subject: Re: [PATCH v5 RESEND 06/17] mm/ioremap: add slab availability checking in ioremap_prot Content-Language: en-US To: Baoquan He , CC: , , , , , , , , , , References: <20230515090848.833045-1-bhe@redhat.com> <20230515090848.833045-7-bhe@redhat.com> From: Kefeng Wang In-Reply-To: <20230515090848.833045-7-bhe@redhat.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.177.243] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected X-Stat-Signature: 5cxny8hhqymnuckmdkdxbdmffhj5rfoh X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: F35B81C0006 X-HE-Tag: 1684375051-853924 X-HE-Meta: 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 vuP+8mNR BAIUNnfFrEgorHUDI8ays5HR02vMhKivJlAS7pY95H9h+Zk6+jKVQCu5kraGXwkMvKwNMn27ISta/oJgbk1VSKgTMSRioNLhF42AHfM39iUYC2ntUiuhI+VT1vfl6/3rGcHRwBmCqBcZFrNqsOev3EqWqWidFED7VmICd13C6ICBEr6YlbU7Hu8W1H3y8nLd6R5soZQMs8YuGSeS0FI4OKh/dUdxcR3NNZnP8cJF9TMKBWiy8doN9Nda7Na/x+GkxUAmdkjQD3UmtaorFhMFwlMHtVh+Q+NcWyHTtBdDfurE4mq3K3bWEv8ieLA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2023/5/15 17:08, Baoquan He wrote: > Several architectures has done checking if slab if available in > ioremap_prot(). In fact it should be done in generic ioremap_prot() > since on any architecutre, slab allocator must be available before > get_vm_area_caller() and vunmap() are used. > > Add the checking into generic_ioremap_prot(). > > Suggested-by: Christophe Leroy > Signed-off-by: Baoquan He > --- > mm/ioremap.c | 4 ++++ > 1 file changed, 4 insertions(+) > Reviewed-by: Kefeng Wang