From a72a08a4b61cb8868606a69b744848552e92062b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 30 Jan 2008 13:34:07 +0100 Subject: [PATCH] x86: cpa: fix split thinko Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/mm/pageattr.c | 4 ++++ 1 file changed, 4 insertions(+) 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 @@ __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;