x86/mm/cpa/selftest: Fix false positive in CPA self test

If the pmd is not present, _PAGE_PSE will not be set anymore. Fix the false positive. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: Andrea Arcangeli <[email protected]> Cc: Stefan Bader <[email protected]> Cc: Andy Whitcroft <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Borislav Petkov <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
cbmeeks · Apr 12, 2013 · 1869973 · 1869973
1 parent f76cfa3
commit 1869973
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/x86/mm/pageattr-test.c b/arch/x86/mm/pageattr-test.c
@@ -68,7 +68,7 @@ static int print_split(struct split_state *s)
 			s->gpg++;
 			i += GPS/PAGE_SIZE;
 		} else if (level == PG_LEVEL_2M) {
-			if (!(pte_val(*pte) & _PAGE_PSE)) {
+			if ((pte_val(*pte) & _PAGE_PRESENT) && !(pte_val(*pte) & _PAGE_PSE)) {
 				printk(KERN_ERR
 					"%lx level %d but not PSE %Lx\n",
 					addr, level, (u64)pte_val(*pte));