x86: cpa: fix split thinko

Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
git-mirror · Jan 30, 2008 · a72a08a · a72a08a
1 parent 3c1df68
commit a72a08a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
@@ -216,8 +216,12 @@ __change_page_attr(unsigned long address, unsigned long pfn, pgprot_t prot)
 	prot = static_protections(prot, address);
 
 	if (level == PG_LEVEL_4K) {
+		WARN_ON_ONCE(pgprot_val(prot) & _PAGE_PSE);
 		set_pte_atomic(kpte, pfn_pte(pfn, canon_pgprot(prot)));
 	} else {
+		/* Clear the PSE bit for the 4k level pages ! */
+		pgprot_val(prot) = pgprot_val(prot) & ~_PAGE_PSE;
+
 		err = split_large_page(kpte, address);
 		if (!err)
 			goto repeat;