From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Huaisheng Ye Subject: [PATCH 5/5] dax/super: Do not request a pointer kaddr when not required Date: Tue, 24 Jul 2018 16:45:10 +0800 Message-Id: <20180724084510.6104-6-yehs2007@zoho.com> In-Reply-To: <20180724084510.6104-1-yehs2007@zoho.com> References: <20180724084510.6104-1-yehs2007@zoho.com> Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: linux-nvdimm@lists.01.org, dan.j.williams@intel.com Cc: ross.zwisler@linux.intel.com, willy@infradead.org, vishal.l.verma@intel.com, dave.jiang@intel.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, viro@zeniv.linux.org.uk, martin.petersen@oracle.com, axboe@kernel.dk, gregkh@linuxfoundation.org, bart.vanassche@wdc.com, jack@suse.cz, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, chengnt@lenovo.com, Huaisheng Ye List-ID: From: Huaisheng Ye Some functions within driver/dax don't need to get pointer kaddr from direct_access. In support of allowing memmap initialization to run in the background elide requests for pointer kaddr when not required. Signed-off-by: Huaisheng Ye --- drivers/dax/super.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 2b2332b..fad68d2 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -88,7 +88,6 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize) struct dax_device *dax_dev; pgoff_t pgoff; int err, id; - void *kaddr; pfn_t pfn; long len; @@ -113,7 +112,7 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize) } id = dax_read_lock(); - len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn); + len = dax_direct_access(dax_dev, pgoff, 1, NULL, &pfn); dax_read_unlock(id); put_dax(dax_dev); -- 1.8.3.1