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x86: fix c_p_a() boot crash 

fix:

> hm, i just found a failing 64-bit .config while testing your CPA
> patchset:
>
>  [    1.916541] CPA mapping 4k 0 large 2048 gb 0 x 0[0-0] miss 0
>  [    1.919874] Unable to handle kernel paging request at 000000000335aea8 RIP:
>  [    1.919874]  [<ffffffff8021d2d3>] change_page_attr+0x3/0x61
>  [    1.919874] PGD 0
>  [    1.919874] Oops: 0000 [1]
>  [    1.919874] CPU 0

This handles addresses which don't have a mem_map entry.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andi Kleen 2008-01-30 13:33:52 +01:00 committed by Ingo Molnar
parent aaa0e89023
commit 6ba9b7d8f0
1 changed files with 2 additions and 2 deletions
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4
arch/x86/mm/pageattr-test.c
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@ -177,7 +177,7 @@ static __init int exercise_pageattr(void)
continue;
}
err = change_page_attr(virt_to_page(addr[i]), len[i],
err = change_page_attr_addr(addr[i], len[i],
pte_pgprot(pte_clrhuge(pte_clrglobal(pte0))));
if (err < 0) {
printk(KERN_ERR "CPA %d failed %d\n", i, err);
@ -212,7 +212,7 @@ static __init int exercise_pageattr(void)
failed++;
continue;
}
err = change_page_attr(virt_to_page(addr[i]), len[i],
err = change_page_attr_addr(addr[i], len[i],
pte_pgprot(pte_mkglobal(*pte)));
if (err < 0) {
printk(KERN_ERR "CPA reverting failed: %d\n", err);