From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 30 Jan 2008 12:33:56 +0000 (+0100)
Subject: x86: cpa self-test fixes
X-Git-Tag: v3.12-rc1~24034^2~103
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5508a7489659f1eed108d3ae7c2d36c8794ee330;p=kernel%2Fkernel-generic.git

x86: cpa self-test fixes

cpa self-test fixes. change_page_attr_addr() was buggy, it
passed in a virtual address as a physical one.

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

diff --git a/arch/x86/mm/pageattr-test.c b/arch/x86/mm/pageattr-test.c
index 91e05a2..a12dabb 100644
--- a/arch/x86/mm/pageattr-test.c
+++ b/arch/x86/mm/pageattr-test.c
@@ -106,12 +106,6 @@ static __init int print_split(struct split_state *s)
 	return err;
 }
 
-static __init int state_same(struct split_state *a, struct split_state *b)
-{
-	return a->lpg == b->lpg && a->gpg == b->gpg && a->spg == b->spg &&
-		a->exec == b->exec;
-}
-
 static unsigned long __initdata addr[NTEST];
 static unsigned int __initdata len[NTEST];
 
@@ -229,8 +223,6 @@ static __init int exercise_pageattr(void)
 	global_flush_tlb();
 
 	failed += print_split(&sc);
-	if (!state_same(&sa, &sc))
-		failed++;
 
 	if (failed)
 		printk(KERN_ERR "CPA selftests NOT PASSED. Please report.\n");
diff --git a/arch/x86/mm/pageattr_32.c b/arch/x86/mm/pageattr_32.c
index 14c923b..ad0868b 100644
--- a/arch/x86/mm/pageattr_32.c
+++ b/arch/x86/mm/pageattr_32.c
@@ -79,8 +79,10 @@ split_large_page(pte_t *kpte, unsigned long address, pgprot_t ref_prot)
 	 * up for us already:
 	 */
 	tmp = lookup_address(address, &level);
-	if (tmp != kpte)
+	if (tmp != kpte) {
+		WARN_ON_ONCE(1);
 		goto out_unlock;
+	}
 
 	address = __pa(address);
 	addr = address & LARGE_PAGE_MASK;
@@ -181,17 +183,19 @@ EXPORT_SYMBOL(change_page_attr);
 int change_page_attr_addr(unsigned long addr, int numpages, pgprot_t prot)
 {
 	int i;
-	unsigned long pfn = (addr >> PAGE_SHIFT);
+	unsigned long pfn = (__pa(addr) >> PAGE_SHIFT);
 
 	for (i = 0; i < numpages; i++) {
 		if (!pfn_valid(pfn + i)) {
+			WARN_ON_ONCE(1);
 			break;
 		} else {
 			int level;
 			pte_t *pte = lookup_address(addr + i*PAGE_SIZE, &level);
-			BUG_ON(pte && !pte_none(*pte));
+			BUG_ON(pte && pte_none(*pte));
 		}
 	}
+
 	return change_page_attr(virt_to_page(addr), i, prot);
 }