[Xen-devel] [PATCH 5 of 7] x86-64: don't check for map replacement

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

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@xxxxxxxxxx>
---
 arch/x86/mm/init_64.c |    3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -195,9 +195,6 @@
        }
 
        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);
 
        /*



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel