RE: [PATCH] usbhid: Fix lockdep unannotated irqs-off warning

[David Laight]

From: Sedat Dilek
...
> Did someone look at the next/follow-ups in this thread?
> For example: D6629 "x86: Emit LAHF/SAHF instead of PUSHF/POPF" [2]?

LAHF and SAHF come with the following note:

This instruction executes as described above in compatibility mode and legacy mode.
It is valid in 64-bit mode only if CPUID.80000001H:ECX.LAHF-SAHF[bit 0] = 1.

So I suspect they can't be used.

	David