On Fri, 4 April 2003 10:09:37 +0200, Jens Axboe wrote:
> On Fri, Apr 04 2003, Jörn Engel wrote:
> > > + error = copy_to_user(io, my_io, sizeof(*my_io)) ? -EFAULT : 0;
> >
> > copy_to_user returns the bytes successfully copied.
> > error is set to -EFAULT, if there was actually data transferred?
> >
> > How about:
> > + error = copy_to_user(io, my_io, sizeof(*my_io)) < sizeof(*my_io) ? -EFAULT : 0;
>
> Pure nonsense! Correct logic, and much nicer to read IMO is:
>
> if (copy_to_user(io, my_io, sizeof(*my_io))
> error = -EFAULT;
Yes, you are right. I just couldn't read inline assembler properly.
Jörn
-- With a PC, I always felt limited by the software available. On Unix, I am limited only by my knowledge. -- Peter J. Schoenster - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Mon Apr 07 2003 - 22:00:22 EST