x86/tsc: Prepare warp test for TSC adjustment

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To allow TSC compensation cross nodes its necessary to know in which
direction the TSC warp was observed. Return the maximum observed value on
the calling CPU so the caller can determine the direction later.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/20161119134017.970859287@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Thomas Gleixner 2016-11-19 13:47:41 +00:00

parent 4c5e3c6375

commit 76d3b85158

1 changed files with 4 additions and 2 deletions

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arch/x86/kernel/tsc_sync.c

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