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Mon, 11 Dec 2023 14:07:48 +0000 Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4Spk8g54R6z4f3l2J for ; Mon, 11 Dec 2023 22:07:31 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 26CE91A0220 for ; Mon, 11 Dec 2023 22:07:34 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP1 (Coremail) with SMTP id cCh0CgDn6xGTF3dlDYFxDQ--.28013S14; Mon, 11 Dec 2023 22:07:33 +0800 (CST) From: Yu Kuai To: axboe@kernel.dk, roger.pau@citrix.com, colyli@suse.de, kent.overstreet@gmail.com, joern@lazybastard.org, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, sth@linux.ibm.com, hoeppner@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, jejb@linux.ibm.com, martin.petersen@oracle.com, clm@fb.com, josef@toxicpanda.com, dsterba@suse.com, viro@zeniv.linux.org.uk, brauner@kernel.org, nico@fluxnic.net, xiang@kernel.org, chao@kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, agruenba@redhat.com, jack@suse.com, konishi.ryusuke@gmail.com, willy@infradead.org, akpm@linux-foundation.org, p.raghav@samsung.com, hare@suse.de Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-bcachefs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, gfs2@lists.linux.dev, linux-nilfs@vger.kernel.org, yukuai3@huawei.com, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH RFC v2 for-6.8/block 10/18] cramfs: use bdev apis in cramfs_blkdev_read() Date: Mon, 11 Dec 2023 22:05:44 +0800 Message-Id: <20231211140552.973290-11-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231211140552.973290-1-yukuai1@huaweicloud.com> References: <20231211140552.973290-1-yukuai1@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: cCh0CgDn6xGTF3dlDYFxDQ--.28013S14 X-Coremail-Antispam: 1UD129KBjvJXoW7Ww17ur1fXryfAFyrJF4fKrg_yoW8tF4UpF 1akanIkr4q9ryI9ayfXr1DZF15Ga4kXF4DCFWxu3y3Z3W5Jrna9r10kry0qFW8GrZFqryv 9r4jkryfur15Ka7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPF14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr1j6r xdM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2 IY04v7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAF wI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWrXVW8Jr1lIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Cr1j6rxdMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JV WxJwCI42IY6I8E87Iv6xkF7I0E14v26F4UJVW0obIYCTnIWIevJa73UjIFyTuYvjfUOBTY UUUUU X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231211_140744_188801_A59440C3 X-CRM114-Status: GOOD ( 12.97 ) X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "desiato.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: From: Yu Kuai On the one hand covert to use folio while reading bdev inode, on the other hand prevent to access bd_inode directly. Also do some cleanup that there is no need for two for loop, and remove local array pages. Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [45.249.212.56 listed in wl.mailspike.net] 0.0 SPF_NONE SPF: sender does not publish an SPF Record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Yu Kuai On the one hand covert to use folio while reading bdev inode, on the other hand prevent to access bd_inode directly. Also do some cleanup that there is no need for two for loop, and remove local array pages. Signed-off-by: Yu Kuai --- fs/cramfs/inode.c | 36 +++++++++++++----------------------- 1 file changed, 13 insertions(+), 23 deletions(-) diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index 60dbfa0f8805..fad95d683d97 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -183,9 +183,6 @@ static int next_buffer; static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset, unsigned int len) { - struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; - struct file_ra_state ra = {}; - struct page *pages[BLKS_PER_BUF]; unsigned i, blocknr, buffer; unsigned long devsize; char *data; @@ -214,37 +211,30 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset, devsize = bdev_nr_bytes(sb->s_bdev) >> PAGE_SHIFT; /* Ok, read in BLKS_PER_BUF pages completely first. */ - file_ra_state_init(&ra, mapping); - page_cache_sync_readahead(mapping, &ra, NULL, blocknr, BLKS_PER_BUF); - - for (i = 0; i < BLKS_PER_BUF; i++) { - struct page *page = NULL; - - if (blocknr + i < devsize) { - page = read_mapping_page(mapping, blocknr + i, NULL); - /* synchronous error? */ - if (IS_ERR(page)) - page = NULL; - } - pages[i] = page; - } + bdev_sync_readahead(sb->s_bdev, NULL, NULL, blocknr, BLKS_PER_BUF); buffer = next_buffer; next_buffer = NEXT_BUFFER(buffer); buffer_blocknr[buffer] = blocknr; buffer_dev[buffer] = sb; - data = read_buffers[buffer]; + for (i = 0; i < BLKS_PER_BUF; i++) { - struct page *page = pages[i]; + struct folio *folio = NULL; + + if (blocknr + i < devsize) + folio = bdev_read_folio(sb->s_bdev, + (blocknr + i) << PAGE_SHIFT); - if (page) { - memcpy_from_page(data, page, 0, PAGE_SIZE); - put_page(page); - } else + if (IS_ERR_OR_NULL(folio)) { memset(data, 0, PAGE_SIZE); + } else { + memcpy_from_folio(data, folio, 0, PAGE_SIZE); + folio_put(folio); + } data += PAGE_SIZE; } + return read_buffers[buffer] + offset; }