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x86: cpa selftest, skip non present entries

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pud and pmd entries in the RAM area might be marked as non present.
Do not try to modify them in the selftest.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-02-04 16:48:08 +01:00 committed by Ingo Molnar
parent 07cf89c05f
commit 64f351d197
1 changed files with 2 additions and 1 deletions
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arch/x86/mm/pageattr-test.c
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@ -137,7 +137,8 @@ static __init int exercise_pageattr(void)
for (k = 0; k < len[i]; k++) {
pte = lookup_address(addr[i] + k*PAGE_SIZE, &level);
if (!pte || pgprot_val(pte_pgprot(*pte)) == 0) {
if (!pte || pgprot_val(pte_pgprot(*pte)) == 0 ||
!(pte_val(*pte) & _PAGE_PRESENT)) {
addr[i] = 0;
break;
}