From: Frederic Weisbecker on
From: Arnd Bergmann <arnd(a)>

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(a)>
Cc: Alasdair G Kergon <agk(a)>
[drop useless llseek = no_llseek]
Signed-off-by: Frederic Weisbecker <fweisbec(a)>
drivers/md/dm-ioctl.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index d7500e1..78b28eb 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1593,6 +1593,7 @@ static long dm_compat_ctl_ioctl(struct file *file, uint command, ulong u)

static const struct file_operations _ctl_fops = {
+ .open = nonseekable_open,
.unlocked_ioctl = dm_ctl_ioctl,
.compat_ioctl = dm_compat_ctl_ioctl,
.owner = THIS_MODULE,

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)
More majordomo info at
Please read the FAQ at