x86: PAT: fix ambiguous paranoia check in pat_init()

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Starting with commit 8d4a430085 (x86:
cleanup PAT cpu validation) the PAT CPU feature flag is not cleared
anymore. Now the error message

  "PAT enabled, but CPU feature cleared"

in pat_init() is misleading.

Furthermore the current code does not check for existence of the PAT
CPU feature flag if a CPU is whitelisted in validate_pat_support.

This patch clears pat_wc_enabled if boot CPU has no PAT feature flag
and adapts the paranoia check.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Andreas Herrmann 2008-06-10 16:05:18 +02:00 • committed by Ingo Molnar

parent ee863ba7ab

commit 97cfab6ac4

2 changed files with 10 additions and 8 deletions

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7

arch/x86/kernel/cpu/addon_cpuid_features.c

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11

arch/x86/mm/pat.c

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