From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from hera.kernel.org ([140.211.167.34]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1PHE8C-00034P-KZ for linux-mtd@lists.infradead.org; Sat, 13 Nov 2010 11:18:52 +0000 Message-ID: <4CDE73EB.2090208@kernel.org> Date: Sat, 13 Nov 2010 12:18:03 +0100 From: Tejun Heo MIME-Version: 1.0 To: dedekind1@gmail.com Subject: Re: [PATCH UPDATED 1/5] mtd: fix bdev exclusive open bugs in block2mtd::add_device() References: <1288628129-12811-1-git-send-email-tj@kernel.org> <1288628129-12811-2-git-send-email-tj@kernel.org> <4CDE6FAA.9030605@kernel.org> <1289646865.2218.27.camel@localhost> In-Reply-To: <1289646865.2218.27.camel@localhost> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: jack@suse.cz, leochen@broadcom.com, neilb@suse.de, heiko.carstens@de.ibm.com, dm-devel@redhat.com, adilger.kernel@dilger.ca, konishi.ryusuke@lab.ntt.co.jp, shaggy@linux.vnet.ibm.com, drbd-dev@lists.linbit.com, joel.becker@oracle.com, hch@infradead.org, aelder@sgi.com, mfasheh@suse.com, joern@logfs.org, reiserfs-devel@vger.kernel.org, viro@zeniv.linux.org.uk, swhiteho@redhat.com, chris.mason@oracle.com, axboe@kernel.dk, tytso@mit.edu, petero2@telia.com, linux-kernel@vger.kernel.org, schwidefsky@de.ibm.com, linux-mtd@lists.infradead.org, akpm@linux-foundation.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hello, On 11/13/2010 12:14 PM, Artem Bityutskiy wrote: > On Sat, 2010-11-13 at 11:59 +0100, Tejun Heo wrote: >> There are two bdev exclusive open bugs. >> >> * open_bdev_exclusive() must not be called with NULL holder. Use dev >> as the holder. >> >> * open_by_devnum() doesn't open the bdev exclusively but >> block2mtd_free_device() always assumes it. Explicitly claim the >> bdev. >> >> The latter is rather clumsy but will be simplified with future >> blkdev_get/put() cleanups. >> >> - Updated to use local variable @mode to cache FMODE_* masks as >> suggested by Artem Bityutskiy. > > Do you want this patch to go in via Jens' tree with the rest of the > series, or as an independent patch via the mtd tree? It probably would be easier if this is routed through Jens' tree as it's necessary for later patches in the series, but this being a fix, this should be merged during this cycle rather than the next one. Jens, how do you want to proceed? Thank you. -- tejun