Message ID | 20190724042518.14363-3-jhubbard@nvidia.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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[216.228.112.21]) by smtp.gmail.com with ESMTPSA id a15sm34153364pgw.3.2019.07.23.21.25.22 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 23 Jul 2019 21:25:23 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk>, Anna Schumaker <anna.schumaker@netapp.com>, "David S . Miller" <davem@davemloft.net>, Dominique Martinet <asmadeus@codewreck.org>, Eric Van Hensbergen <ericvh@gmail.com>, Jason Gunthorpe <jgg@ziepe.ca>, Jason Wang <jasowang@redhat.com>, Jens Axboe <axboe@kernel.dk>, Latchesar Ionkov <lucho@ionkov.net>, "Michael S . Tsirkin" <mst@redhat.com>, Miklos Szeredi <miklos@szeredi.hu>, Trond Myklebust <trond.myklebust@hammerspace.com>, Christoph Hellwig <hch@lst.de>, Matthew Wilcox <willy@infradead.org>, linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>, ceph-devel@vger.kernel.org, kvm@vger.kernel.org, linux-block@vger.kernel.org, linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, samba-technical@lists.samba.org, v9fs-developer@lists.sourceforge.net, virtualization@lists.linux-foundation.org, =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>, John Hubbard <jhubbard@nvidia.com>, Jan Kara <jack@suse.cz>, Dan Williams <dan.j.williams@intel.com>, Johannes Thumshirn <jthumshirn@suse.de>, Ming Lei <ming.lei@redhat.com>, Dave Chinner <david@fromorbit.com> Subject: [PATCH 02/12] iov_iter: add helper to test if an iter would use GUP v2 Date: Tue, 23 Jul 2019 21:25:08 -0700 Message-Id: <20190724042518.14363-3-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190724042518.14363-1-jhubbard@nvidia.com> References: <20190724042518.14363-1-jhubbard@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit 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: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
block/bio, fs: convert put_page() to put_user_page*()
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expand
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diff --git a/include/linux/uio.h b/include/linux/uio.h index ab5f523bc0df..2a179af8e5a7 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -86,6 +86,17 @@ static inline unsigned char iov_iter_rw(const struct iov_iter *i) return i->type & (READ | WRITE); } +/** + * iov_iter_get_pages_use_gup - report if iov_iter_get_pages(i) uses GUP + * @i: iterator + * Return: true if a call to iov_iter_get_pages*() with the iter provided in + * the argument would result in the use of get_user_pages*() + */ +static inline bool iov_iter_get_pages_use_gup(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_IOVEC; +} + /* * Total number of bytes covered by an iovec. *