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The
- raw1394 (/dev/raw1394),
- video1394 (/dev/video1394/*),
- dv1394 (/dev/dv1394/*)
character device file ABIs do not make any use of lseek(), pread(), or
pwrite(). Therefore use nonseekable_open() and, redundantly, set
file_operations.llseek to no_llseek to remove any doubt whether the BKL-
grabbing default_llseek handler is used.
Although all this is legacy code which should be left in peace until it
is eventually removed (as it is superseded by firewire-core's
<linux/firewire-cdev.h> ABI), this change seems still worth doing to
further minimize the presence of BKL usage in the kernel.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
7cfe21aae1