x86: remove X2 workaround
With the spurious handler fix, the X2 does not lock up anymore.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 16ce841..c870424 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -260,17 +260,6 @@
pgprot_t old_prot, new_prot;
int level, do_split = 1;
- /*
- * An Athlon 64 X2 showed hard hangs if we tried to preserve
- * largepages and changed the PSE entry from RW to RO.
- *
- * As AMD CPUs have a long series of erratas in this area,
- * (and none of the known ones seem to explain this hang),
- * disable this code until the hang can be debugged:
- */
- if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
- return 1;
-
spin_lock_irqsave(&pgd_lock, flags);
/*
* Check for races, another CPU might have split this page