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Sun, 14 Dec 2014 21:27:30 -0800 (PST) From: Omar Sandoval To: Alexander Viro , Andrew Morton , Trond Myklebust , Christoph Hellwig , David Sterba , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Omar Sandoval Subject: [PATCH 4/8] iov_iter: add iov_iter_bvec and convert callers Date: Sun, 14 Dec 2014 21:26:58 -0800 Message-Id: <8cac277c6def1ea561028747f1065c9d0ca4ab77.1418618044.git.osandov@osandov.com> X-Mailer: git-send-email 2.1.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Omar Sandoval --- fs/splice.c | 7 ++----- include/linux/uio.h | 2 ++ mm/iov_iter.c | 12 ++++++++++++ mm/page_io.c | 14 +++++--------- 4 files changed, 21 insertions(+), 14 deletions(-) diff --git a/fs/splice.c b/fs/splice.c index 75c6058..7c7176f 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1006,11 +1006,8 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out, } /* ... iov_iter */ - from.type = ITER_BVEC | WRITE; - from.bvec = array; - from.nr_segs = n; - from.count = sd.total_len - left; - from.iov_offset = 0; + iov_iter_bvec(&from, ITER_BVEC | WRITE, array, n, + sd.total_len - left); /* ... and iocb */ init_sync_kiocb(&kiocb, out); diff --git a/include/linux/uio.h b/include/linux/uio.h index bd8569a..d1a34b4 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -90,6 +90,8 @@ void iov_iter_init(struct iov_iter *i, int direction, const struct iovec *iov, unsigned long nr_segs, size_t count); void iov_iter_kvec(struct iov_iter *i, int direction, const struct kvec *iov, unsigned long nr_segs, size_t count); +void iov_iter_bvec(struct iov_iter *i, int direction, const struct bio_vec *bv, + unsigned long nr_segs, size_t count); ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages, size_t maxsize, unsigned maxpages, size_t *start); ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages, diff --git a/mm/iov_iter.c b/mm/iov_iter.c index a1599ca..c975bc4 100644 --- a/mm/iov_iter.c +++ b/mm/iov_iter.c @@ -513,6 +513,18 @@ void iov_iter_kvec(struct iov_iter *i, int direction, } EXPORT_SYMBOL(iov_iter_kvec); +void iov_iter_bvec(struct iov_iter *i, int direction, const struct bio_vec *bv, + unsigned long nr_segs, size_t count) +{ + BUG_ON(!(direction & ITER_BVEC)); + i->type = direction; + i->bvec = bv; + i->nr_segs = nr_segs; + i->iov_offset = 0; + i->count = count; +} +EXPORT_SYMBOL(iov_iter_bvec); + unsigned long iov_iter_alignment(const struct iov_iter *i) { unsigned long res = 0; diff --git a/mm/page_io.c b/mm/page_io.c index c229f88..4741248 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -265,18 +265,14 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc, struct file *swap_file = sis->swap_file; struct inode *inode = file_inode(swap_file); struct address_space *mapping = swap_file->f_mapping; + struct iov_iter from; struct bio_vec bv = { .bv_page = page, - .bv_len = PAGE_SIZE, - .bv_offset = 0 + .bv_len = PAGE_SIZE, + .bv_offset = 0, }; - struct iov_iter from = { - .type = ITER_BVEC | WRITE, - .count = PAGE_SIZE, - .iov_offset = 0, - .nr_segs = 1, - }; - from.bvec = &bv; /* older gcc versions are broken */ + + iov_iter_bvec(&from, ITER_BVEC | WRITE, &bv, 1, PAGE_SIZE); init_sync_kiocb(&kiocb, swap_file); kiocb.ki_pos = page_file_offset(page);