x86, hyperv: Bypass the timer_irq_works() check
x86, hyperv: Bypass the timer_irq_works() check

This patch bypass the timer_irq_works() check for hyperv guest since:

- It was guaranteed to work.
- timer_irq_works() may fail sometime due to the lpj calibration were inaccurate
  in a hyperv guest or a buggy host.

In the future, we should get the tsc frequency from hypervisor and use preset
lpj instead.

[ hpa: I would prefer to not defer things to "the future" in the future... ]

Cc: K. Y. Srinivasan <bcbf172338421f26297a2592698edf8cc84ecbef@microsoft.com>
Cc: Haiyang Zhang <6c26c5044f1d67d9ed5db6596adb36d25510e216@microsoft.com>
Cc: <4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org>
Acked-by: K. Y. Srinivasan <bcbf172338421f26297a2592698edf8cc84ecbef@microsoft.com>
Signed-off-by: Jason Wang <808efd45667dbd241e4e026b5673172419ecb43e@redhat.com>
Link: http://lkml.kernel.org/r/1393558229-14755-1-git-send-email-808efd45667dbd241e4e026b5673172419ecb43e@redhat.com
Signed-off-by: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@linux.intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs