From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932690AbbFEVWH (ORCPT ); Fri, 5 Jun 2015 17:22:07 -0400 Received: from mga14.intel.com ([192.55.52.115]:42590 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752585AbbFEVWA (ORCPT ); Fri, 5 Jun 2015 17:22:00 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,560,1427785200"; d="scan'208";a="503440612" Subject: [PATCH v4 3/9] dax: drop size parameter to ->direct_access() From: Dan Williams To: linux-kernel@vger.kernel.org Cc: axboe@kernel.dk, boaz@plexistor.com, david@fromorbit.com, linux-arch@vger.kernel.org, arnd@arndb.de, ross.zwisler@linux.intel.com, linux-nvdimm@ml01.01.org, benh@kernel.crashing.org, linux-fsdevel@vger.kernel.org, heiko.carstens@de.ibm.com, hch@lst.de, tj@kernel.org, paulus@samba.org, hpa@zytor.com, schwidefsky@de.ibm.com, willy@linux.intel.com, akpm@linux-foundation.org, torvalds@linux-foundation.org, mingo@kernel.org Date: Fri, 05 Jun 2015 17:19:18 -0400 Message-ID: <20150605211918.20751.21557.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <20150605205052.20751.77149.stgit@dwillia2-desk3.amr.corp.intel.com> References: <20150605205052.20751.77149.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-8-g92dd MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org None of the implementations currently use it. The common bdev_direct_access() entry point handles all the size checks before calling ->direct_access(). Signed-off-by: Dan Williams --- arch/powerpc/sysdev/axonram.c | 2 +- drivers/block/brd.c | 6 +----- drivers/block/pmem.c | 2 +- drivers/s390/block/dcssblk.c | 4 ++-- fs/block_dev.c | 2 +- include/linux/blkdev.h | 2 +- 6 files changed, 7 insertions(+), 11 deletions(-) diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c index ee90db17b097..e8657d3bc588 100644 --- a/arch/powerpc/sysdev/axonram.c +++ b/arch/powerpc/sysdev/axonram.c @@ -141,7 +141,7 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio) */ static long axon_ram_direct_access(struct block_device *device, sector_t sector, - void **kaddr, unsigned long *pfn, long size) + void **kaddr, unsigned long *pfn) { struct axon_ram_bank *bank = device->bd_disk->private_data; loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT; diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 64ab4951e9d6..41528857c70d 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -371,7 +371,7 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector, #ifdef CONFIG_BLK_DEV_RAM_DAX static long brd_direct_access(struct block_device *bdev, sector_t sector, - void **kaddr, unsigned long *pfn, long size) + void **kaddr, unsigned long *pfn) { struct brd_device *brd = bdev->bd_disk->private_data; struct page *page; @@ -384,10 +384,6 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector, *kaddr = page_address(page); *pfn = page_to_pfn(page); - /* - * TODO: If size > PAGE_SIZE, we could look to see if the next page in - * the file happens to be mapped to the next page of physical RAM. - */ return PAGE_SIZE; } #else diff --git a/drivers/block/pmem.c b/drivers/block/pmem.c index eabf4a8d0085..1f5b5a6288c0 100644 --- a/drivers/block/pmem.c +++ b/drivers/block/pmem.c @@ -98,7 +98,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, } static long pmem_direct_access(struct block_device *bdev, sector_t sector, - void **kaddr, unsigned long *pfn, long size) + void **kaddr, unsigned long *pfn) { struct pmem_device *pmem = bdev->bd_disk->private_data; size_t offset = sector << 9; diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index da212813f2d5..2f1734ba0e22 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -29,7 +29,7 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode); static void dcssblk_release(struct gendisk *disk, fmode_t mode); static void dcssblk_make_request(struct request_queue *q, struct bio *bio); static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum, - void **kaddr, unsigned long *pfn, long size); + void **kaddr, unsigned long *pfn); static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0"; @@ -879,7 +879,7 @@ fail: static long dcssblk_direct_access (struct block_device *bdev, sector_t secnum, - void **kaddr, unsigned long *pfn, long size) + void **kaddr, unsigned long *pfn) { struct dcssblk_dev_info *dev_info; unsigned long offset, dev_sz; diff --git a/fs/block_dev.c b/fs/block_dev.c index f04c873a7365..19750f058495 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -453,7 +453,7 @@ long bdev_direct_access(struct block_device *bdev, sector_t sector, sector += get_start_sect(bdev); if (sector % (PAGE_SIZE / 512)) return -EINVAL; - avail = ops->direct_access(bdev, sector, addr, pfn, size); + avail = ops->direct_access(bdev, sector, addr, pfn); if (!avail) return -ERANGE; return min(avail, size); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 31cd832cebb7..535b82f790a6 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1553,7 +1553,7 @@ struct block_device_operations { int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); long (*direct_access)(struct block_device *, sector_t, - void **, unsigned long *pfn, long size); + void **, unsigned long *pfn); unsigned int (*check_events) (struct gendisk *disk, unsigned int clearing); /* ->media_changed() is DEPRECATED, use ->check_events() instead */