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[2003:cb:c705:6d00:5870:9639:1c17:8162]) by smtp.gmail.com with ESMTPSA id j16-20020adfff90000000b002c55efa9cbesm1321826wrr.39.2023.02.13.07.48.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Feb 2023 07:48:44 -0800 (PST) Message-ID: <463118d9-8db2-7d21-ead5-cb35c10cf3e2@redhat.com> Date: Mon, 13 Feb 2023 16:48:43 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.6.0 Subject: Re: [PATCH v2 2/4] splice: Provide pipe_head_buf() helper To: David Howells , Jens Axboe , Al Viro , Christoph Hellwig Cc: Matthew Wilcox , Jan Kara , Jeff Layton , Jason Gunthorpe , Logan Gunthorpe , Hillf Danton , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Christoph Hellwig , John Hubbard References: <20230213153301.2338806-1-dhowells@redhat.com> <20230213153301.2338806-3-dhowells@redhat.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20230213153301.2338806-3-dhowells@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 795154000B X-Stat-Signature: 5b6j8cix6yjf6nqazzwchc7gtrwa36zz X-HE-Tag: 1676303328-189562 X-HE-Meta: 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 687GQ1VQ 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 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 13.02.23 16:32, David Howells wrote: > Provide a helper, pipe_head_buf(), to get the current head buffer from a > pipe. Implement this as a wrapper around a more general function, > pipe_buf(), that gets a specified buffer. > > Requested-by: Christoph Hellwig > Signed-off-by: David Howells > Reviewed-by: Christoph Hellwig > cc: Jens Axboe > cc: Al Viro > cc: John Hubbard > cc: David Hildenbrand > cc: Matthew Wilcox > cc: linux-block@vger.kernel.org > cc: linux-fsdevel@vger.kernel.org > cc: linux-mm@kvack.org > --- Reviewed-by: David Hildenbrand -- Thanks, David / dhildenb