From: Artem Bityutskiy <dedekind1@gmail.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Jan Kara <jack@suse.cz>,
linux-kernel@vger.kernel.org, David Howells <dhowells@redhat.com>,
Alexander Shishkin <virtuoso@slind.org>,
linux-mtd@lists.infradead.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH v3] mtd: Do not corrupt backing device of device node inode
Date: Wed, 05 May 2010 17:17:19 +0300 [thread overview]
Message-ID: <1273069039.3702.188.camel@localhost> (raw)
In-Reply-To: <1273047688-20947-1-git-send-email-kirill@shutemov.name>
On Wed, 2010-05-05 at 11:21 +0300, Kirill A. Shutemov wrote:
> We cannot modify file->f_mapping->backing_dev_info, because it will corrupt
> backing device of device node inode, since file->f_mapping is equal to
> inode->i_mapping (see __dentry_open() in fs/open.c).
>
> Let's introduce separate inode for MTD device with appropriate backing
> device.
>
> Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
> Acked-by: Jan Kara <jack@suse.cz>
I get the following build error:
[dedekind@eru l2-mtd-2.6]$ make -j8
O=/home/dedekind/tmp/l2-mtd-2.6-x86_64/
GEN /home/dedekind/tmp/l2-mtd-2.6-x86_64/Makefile
CHK include/linux/version.h
CHK include/generated/utsrelease.h
Using /home/dedekind/git/l2-mtd-2.6 as source for kernel
CALL /home/dedekind/git/l2-mtd-2.6/scripts/checksyscalls.sh
CHK include/generated/compile.h
CHK include/linux/version.h
make[3]: `scripts/unifdef' is up to date.
Building modules, stage 2.
Kernel: arch/x86/boot/bzImage is ready (#2)
MODPOST 146 modules
ERROR: "__iget" [drivers/mtd/mtdchar.ko] undefined!
ERROR: "inode_lock" [drivers/mtd/mtdchar.ko] undefined!
make[2]: *** [__modpost] Error 1
make[1]: *** [modules] Error 2
make: *** [sub-make] Error 2
__iget and inode_lock are not exported...
--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
next prev parent reply other threads:[~2010-05-05 14:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-05 8:21 [PATCH v3] mtd: Do not corrupt backing device of device node inode Kirill A. Shutemov
2010-05-05 14:17 ` Artem Bityutskiy [this message]
2010-05-05 14:27 ` Jan Kara
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