x86: cpa, only flush the cache if the caching attributes have changed

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We only need to flush the caches in cpa() if the the caching attributes
have changed. Otherwise only flush the TLBs.

This checks the PAT bits too although they are currently not used by
the kernel.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

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Andi Kleen 2008-02-04 16:48:06 +01:00 • committed by Ingo Molnar

parent 9bf5a47572

commit 6bb8383beb

1 changed files with 24 additions and 7 deletions

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arch/x86/mm/pageattr.c

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