x86: remove X2 workaround

With the spurious handler fix, the X2 does not lock up anymore.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 11 deletions

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 16ce841f08d..c870424aa9a 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -260,17 +260,6 @@ try_preserve_large_page(pte_t *kpte, unsigned long address,
         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