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SubjectRe: [PATCH v3] mtd: Do not corrupt backing device of device node inode
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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)

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