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dm ioctl: use nonseekable_open

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The dm control device does not implement read/write, so it has no use for
seeking.  Using no_llseek prevents falling back to default_llseek, which
requires the BKL.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Arnd Bergmann 2010-08-12 04:13:57 +01:00 committed by Alasdair G Kergon
parent 3f77316de0
commit 402ab352c2
1 changed files with 1 additions and 0 deletions
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drivers/md/dm-ioctl.c
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@ -1602,6 +1602,7 @@ static long dm_compat_ctl_ioctl(struct file *file, uint command, ulong u)
#endif
static const struct file_operations _ctl_fops = {
.open = nonseekable_open,
.unlocked_ioctl = dm_ctl_ioctl,
.compat_ioctl = dm_compat_ctl_ioctl,
.owner = THIS_MODULE,