x86: cpa: fix split thinko

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

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 23f0aa3d01c1..a2ee317548f2 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -216,8 +216,12 @@ repeat:
         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;