From patchwork Tue Nov 24 13:27:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11928893 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3778FC8258E for ; Tue, 24 Nov 2020 13:30:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A1B1A204EC for ; Tue, 24 Nov 2020 13:30:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="KADdJG2R" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A1B1A204EC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 74F2F6B0120; Tue, 24 Nov 2020 08:29:28 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 6D7E96B0122; Tue, 24 Nov 2020 08:29:28 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 52ECC6B0123; Tue, 24 Nov 2020 08:29:28 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0158.hostedemail.com [216.40.44.158]) by kanga.kvack.org (Postfix) with ESMTP id 344206B0120 for ; Tue, 24 Nov 2020 08:29:28 -0500 (EST) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 03D461EF1 for ; Tue, 24 Nov 2020 13:29:28 +0000 (UTC) X-FDA: 77519393616.01.queen85_1014e7a2736e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin01.hostedemail.com (Postfix) with ESMTP id D27131004A0AF for ; Tue, 24 Nov 2020 13:29:27 +0000 (UTC) X-HE-Tag: queen85_1014e7a2736e X-Filterd-Recvd-Size: 8789 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf34.hostedemail.com (Postfix) with ESMTP for ; Tue, 24 Nov 2020 13:29:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=oY/Kzr07zSpX+zHQFFeLth/QBlUbzbRy+7rMoha2aW8=; b=KADdJG2RhR4/EqqmDR2o46+ook CJr/KoBRvzXuaGAzArmj0uFbtLWWacUi3GUHPNtW5gX+xXv2xhbfbJGb7ALMkupFI53CzOTk86848 7nWfv4SWiWKmQYpt7ubrEpnqNpH/Gv4MXURNq6jxRjnMI+yadTr91z4UnJ3e/Ux9cofnNl7pzL3aV uEFPy1OOl7jAKXLcYeRLyijWGjLTq1guL80iDVCbay23g7rQhuwy5LOm2l6sdF2RN9/jvwR+0hra6 HdSBQuMgnQPSPASpJLUUiANBaVoaraWMU/rc01jMlFng4Fsq8t435FuUVFfM1FddcNMS4tYgD39ll jo+Vc6wg==; Received: from [2001:4bb8:180:5443:c70:4a89:bc61:3] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1khYNb-0006jz-99; Tue, 24 Nov 2020 13:29:11 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Tejun Heo , Josef Bacik , Konrad Rzeszutek Wilk , Coly Li , Mike Snitzer , Greg Kroah-Hartman , Jan Kara , Johannes Thumshirn , dm-devel@redhat.com, Richard Weinberger , Jan Kara , linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 45/45] block: stop using bdget_disk for partition 0 Date: Tue, 24 Nov 2020 14:27:51 +0100 Message-Id: <20201124132751.3747337-46-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201124132751.3747337-1-hch@lst.de> References: <20201124132751.3747337-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html 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: We can just dereference the point in struct gendisk instead. Also remove the now unused export. Signed-off-by: Christoph Hellwig Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jan Kara --- block/genhd.c | 1 - drivers/block/nbd.c | 4 +--- drivers/block/xen-blkfront.c | 20 +++++--------------- drivers/block/zram/zram_drv.c | 18 +++--------------- drivers/md/dm.c | 16 ++-------------- drivers/s390/block/dasd_ioctl.c | 5 ++--- 6 files changed, 13 insertions(+), 51 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index e1f67b9951f0ec..9a3ad1895888c6 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -912,7 +912,6 @@ struct block_device *bdget_disk(struct gendisk *disk, int partno) return bdev; } -EXPORT_SYMBOL(bdget_disk); /* * print a full list of all partitions - intended for places where the root diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 014683968ce174..92f84ed0ba9eb6 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -1488,12 +1488,10 @@ static int nbd_open(struct block_device *bdev, fmode_t mode) static void nbd_release(struct gendisk *disk, fmode_t mode) { struct nbd_device *nbd = disk->private_data; - struct block_device *bdev = bdget_disk(disk, 0); if (test_bit(NBD_RT_DISCONNECT_ON_CLOSE, &nbd->config->runtime_flags) && - bdev->bd_openers == 0) + disk->part0->bd_openers == 0) nbd_disconnect_and_put(nbd); - bdput(bdev); nbd_config_put(nbd); nbd_put(nbd); diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 79521e33d30ed5..188e0b47534bcf 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -2153,7 +2153,7 @@ static void blkfront_closing(struct blkfront_info *info) } if (info->gd) - bdev = bdget_disk(info->gd, 0); + bdev = bdgrab(info->gd->part0); mutex_unlock(&info->mutex); @@ -2518,7 +2518,7 @@ static int blkfront_remove(struct xenbus_device *xbdev) disk = info->gd; if (disk) - bdev = bdget_disk(disk, 0); + bdev = bdgrab(disk->part0); info->xbdev = NULL; mutex_unlock(&info->mutex); @@ -2595,19 +2595,11 @@ static int blkif_open(struct block_device *bdev, fmode_t mode) static void blkif_release(struct gendisk *disk, fmode_t mode) { struct blkfront_info *info = disk->private_data; - struct block_device *bdev; struct xenbus_device *xbdev; mutex_lock(&blkfront_mutex); - - bdev = bdget_disk(disk, 0); - - if (!bdev) { - WARN(1, "Block device %s yanked out from us!\n", disk->disk_name); + if (disk->part0->bd_openers) goto out_mutex; - } - if (bdev->bd_openers) - goto out; /* * Check if we have been instructed to close. We will have @@ -2619,7 +2611,7 @@ static void blkif_release(struct gendisk *disk, fmode_t mode) if (xbdev && xbdev->state == XenbusStateClosing) { /* pending switch to state closed */ - dev_info(disk_to_dev(bdev->bd_disk), "releasing disk\n"); + dev_info(disk_to_dev(disk), "releasing disk\n"); xlvbd_release_gendisk(info); xenbus_frontend_closed(info->xbdev); } @@ -2628,14 +2620,12 @@ static void blkif_release(struct gendisk *disk, fmode_t mode) if (!xbdev) { /* sudden device removal */ - dev_info(disk_to_dev(bdev->bd_disk), "releasing disk\n"); + dev_info(disk_to_dev(disk), "releasing disk\n"); xlvbd_release_gendisk(info); disk->private_data = NULL; free_info(info); } -out: - bdput(bdev); out_mutex: mutex_unlock(&blkfront_mutex); } diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 01757f9578dcb8..56024905bd242c 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1748,7 +1748,7 @@ static ssize_t reset_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct zram *zram = dev_to_zram(dev); - struct block_device *bdev; + struct block_device *bdev = zram->disk->part0; unsigned short do_reset; int ret = 0; @@ -1758,17 +1758,12 @@ static ssize_t reset_store(struct device *dev, if (!do_reset) return -EINVAL; - bdev = bdget_disk(zram->disk, 0); - if (!bdev) - return -ENOMEM; - mutex_lock(&bdev->bd_mutex); if (bdev->bd_openers) ret = -EBUSY; else zram_reset_device(zram); mutex_unlock(&bdev->bd_mutex); - bdput(bdev); return ret ? ret : len; } @@ -1933,15 +1928,8 @@ static int zram_add(void) static int zram_remove(struct zram *zram) { - struct block_device *bdev = bdget_disk(zram->disk, 0); - - if (bdev) { - if (bdev->bd_openers) { - bdput(bdev); - return -EBUSY; - } - bdput(bdev); - } + if (zram->disk->part0->bd_openers) + return -EBUSY; del_gendisk(zram->disk); zram_debugfs_unregister(zram); diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 176adcff56b380..ed7e836efbcdbc 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2375,16 +2375,11 @@ struct dm_table *dm_swap_table(struct mapped_device *md, struct dm_table *table) */ static int lock_fs(struct mapped_device *md) { - struct block_device *bdev; int r; WARN_ON(test_bit(DMF_FROZEN, &md->flags)); - bdev = bdget_disk(md->disk, 0); - if (!bdev) - return -ENOMEM; - r = freeze_bdev(bdev); - bdput(bdev); + r = freeze_bdev(md->disk->part0); if (!r) set_bit(DMF_FROZEN, &md->flags); return r; @@ -2392,16 +2387,9 @@ static int lock_fs(struct mapped_device *md) static void unlock_fs(struct mapped_device *md) { - struct block_device *bdev; - if (!test_bit(DMF_FROZEN, &md->flags)) return; - - bdev = bdget_disk(md->disk, 0); - if (!bdev) - return; - thaw_bdev(bdev); - bdput(bdev); + thaw_bdev(md->disk->part0); clear_bit(DMF_FROZEN, &md->flags); } diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index 304eba1acf163c..9f642440894655 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -220,9 +220,8 @@ dasd_format(struct dasd_block *block, struct format_data_t *fdata) * enabling the device later. */ if (fdata->start_unit == 0) { - struct block_device *bdev = bdget_disk(block->gdp, 0); - bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); - bdput(bdev); + block->gdp->part0->bd_inode->i_blkbits = + blksize_bits(fdata->blksize); } rc = base->discipline->format_device(base, fdata, 1);