new helpers: no_seek_end_llseek{,_size}()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 38ae877c..dbc3e14 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -157,30 +157,6 @@
ps->dev->state != USB_STATE_NOTATTACHED);
}
-static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
-{
- loff_t ret;
-
- mutex_lock(&file_inode(file)->i_mutex);
-
- switch (orig) {
- case 0:
- file->f_pos = offset;
- ret = file->f_pos;
- break;
- case 1:
- file->f_pos += offset;
- ret = file->f_pos;
- break;
- case 2:
- default:
- ret = -EINVAL;
- }
-
- mutex_unlock(&file_inode(file)->i_mutex);
- return ret;
-}
-
static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
loff_t *ppos)
{
@@ -2366,7 +2342,7 @@
const struct file_operations usbdev_file_operations = {
.owner = THIS_MODULE,
- .llseek = usbdev_lseek,
+ .llseek = no_seek_end_llseek,
.read = usbdev_read,
.poll = usbdev_poll,
.unlocked_ioctl = usbdev_ioctl,