RE: [PATCH] x86/entry/32: Fix setup of CS high bits

[David Laight]

From: Jan Kiszka
> On 15.10.18 15:14, David Laight wrote:
> > From: Jan Kiszka
> >> Sent: 15 October 2018 14:09
> > ...
> >>> Those fields are genuinely 16 bit.  So the comment should say
> >>> something like "Those high bits are used for CS_FROM_ENTRY_STACK and
> >>> CS_FROM_USER_CR3".
> >>
> >> /*
> >>    * The high bits of the CS dword (__csh) are used for
> >>    * CS_FROM_ENTRY_STACK and CS_FROM_USER_CR3. Clear them in case
> >>    * hardware didn't do this for us.
> >>    */
> >
> > What's a 'dword' ? :-)
> >
> > On a 32bit processor a 'word' will be 32 bits to a 'double-word'
> > would be 64 bits.
> > One of the worst names to use.
> 
> That's ia32 nomenclature: a doubleword (dword) is a 32-bit value.

I think you missed the :-)
I don't think linux uses that term very often.

Any guesses as to what type DWORD_PTR is?
(in a well know 64bit environment that uses UPPER_CASE for types).

	David

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