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SubjectRe: ioctl cleanups: enable sg_io and serial stuff to be shared
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   From: Pavel Machek <pavel@ucw.cz>
Date: Thu, 8 May 2003 22:33:14 +0200

What about this one: redefine it to (*ioctl)( ...., unsigned *long*,
unsinged long). That means we can add

#define IOCTL_COMPAT 0x1 0000 0000

Bzzt! Doesn't work on 32-bit. COMPAT does not mean 64-bit-->32-bit
translations, stop thinking about the compat layer in this way.

It is a generic environment translation system.

Eventually we can use it for things like IBCS2 and stuff like that.

Suggest something sane like defining a macro such as
"compat_task(tsk)" that can be tested by various bits of
code.
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