no-op error in dmesg

Pritam Bankar pritambankar1988 at
Mon Jun 18 14:34:09 EDT 2012

I have one structure called foo. Address of object of foo(say objfoo) is 
passed to ioctl call

status = ioctl(fd, arg, &objfoo);

But during manipulation I am not getting ioctl error 5 (input/output error).
I am more confused about error in dmesg which is
*foo: no-op *

What does no-op indicate? If it is no-operation, how can we relate this 
to foo structure?

-------------- next part --------------
An HTML attachment was scrubbed...

More information about the Kernelnewbies mailing list