Re: [patch] i386: remove IOPL check on task switch

[Linus Torvalds]

On Sat, 4 Nov 2006, Zachary Amsden wrote:
>
> Ok, checking shows Linus put it back to stop NT leakage.  This is correct, but
> unlikely.  Would be nice to avoid it unless absolutely necessary.  Perhaps xor
> eflags old and new and only set_system_eflags() if non-ALU bits have changed.

Not just NT. AC also leaked, and caused crashes in other programs (Wine) 
that didn't expect AC to be set and did unaligned accesses.

		Linus
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