Re: compat_ioctl question

From: Paul Fulghum
Date: Thu Apr 26 2007 - 18:16:23 EST

Arnd Bergmann wrote:
So you are interested in the MGSL_* set of ioctls, right?
AFAICS, they are all compatible, with the exception of

Fortunately, these two have different ioctl numbers on
64 bit, so you can define a new

and handle both versions in the ioctl function.

I missed that approach, thanks.

Yes, that would be the right solution. I've started this
some time ago, but never finished it:

Currently the tty file ops do not include that and
tty_io.c does not register a compat_ioctl(), instead
relying on compat_ioctl.h and compat_ioctl.c

Just adding the hook in tty_io.c should be trivial, please do that.
If you like, you can also move the vt ioctls in order to reduce
the size of fs/compat_ioctl.c.

I'll look at that.

You have given me precisely the information I need.

I just wanted to be sure I did not pursue a dead end
and have people go 'ewwww... why did you do it that way?'


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at