x86/tsc: Validate TSC_ADJUST after resume

Some 'feature' BIOSes fiddle with the TSC_ADJUST register during
suspend/resume which renders the TSC unusable.

Add sanity checks into the resume path and restore the
original value if it was adjusted.

Reported-and-tested-by: Roland Scheidegger <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Bruce Schlobohm <[email protected]>
Cc: Kevin Stanton <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Allen Hung <[email protected]>
Cc: Borislav Petkov <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

0 files changed, 0 insertions, 0 deletions