x86: don't use P6_NOPs if compiling with CONFIG_X86_GENERIC

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P6_NOPs are definitely not supported on some VIA CPUs, and possibly
(unverified) on AMD K7s.  It is also the only thing that prevents a
686 kernel from running on Transmeta TM3x00/5x00 (Crusoe) series.

The performance benefit over generic NOPs is very small, so when
building for generic consumption, avoid using them.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

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H. Peter Anvin 2008-02-14 14:56:45 -08:00 • committed by Ingo Molnar

parent 7343b3b3a6

commit 959b3be64c

1 changed files with 10 additions and 1 deletions

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arch/x86/Kconfig.cpu

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