x86-64: don't check for map replacement

The check prevents flags on mappings from being changed, which is not
desireable.  There's no need to check for replacing a mapping, and
x86-32 does not do this check.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 3 deletions

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 5beb89683453..7c8bb46e83e4 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -196,9 +196,6 @@ set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte)
         }
 
         pte = pte_offset_kernel(pmd, vaddr);
-        if (!pte_none(*pte) && pte_val(new_pte) &&
-            pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask))
-                pte_ERROR(*pte);
         set_pte(pte, new_pte);
 
         /*