new helpers: no_seek_end_llseek{,_size}()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 25 deletions

diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 2a3bbdf7eb94..cffa0a0d7de2 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -661,32 +661,8 @@ static unsigned int usb_device_poll(struct file *file,
         return 0;
 }
 
-static loff_t usb_device_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;
-}
-
 const struct file_operations usbfs_devices_fops = {
-        .llseek =       usb_device_lseek,
+        .llseek =       no_seek_end_llseek,
         .read =         usb_device_read,
         .poll =         usb_device_poll,
 };