1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 14724be48bec..ddc392bee243 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -944,6 +944,12 @@ int __cpuinit __cpu_up(unsigned int cpu)
                 return -ENOSYS;
         }
 
+        /*
+         * Save current MTRR state in case it was changed since early boot
+         * (e.g. by the ACPI SMI) to initialize new CPUs with MTRRs in sync:
+         */
+        mtrr_save_state();
+
         per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
         /* Boot it! */
         err = do_boot_cpu(cpu, apicid);