Messages in this thread | | | From | David Laight <> | Subject | RE: [PATCH] usbhid: Fix lockdep unannotated irqs-off warning | Date | Mon, 7 Mar 2016 17:27:14 +0000 |
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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
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