x86: do not enable TSC notifier if we don't need it

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Impact: crash on non-TSC-equipped CPUs

Don't enable the TSC notifier if we *either*:

1. don't have a CPU, or
2. have a CPU with constant TSC.

In either of those cases, the notifier is either damaging (1) or useless(2).

From: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Linus Torvalds 2008-08-24 11:52:06 -07:00 • committed by H. Peter Anvin

parent 8735728ef8

commit 060700b571

1 changed files with 4 additions and 0 deletions

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arch/x86/kernel/tsc.c

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