x86: do smp tainting checks in a separate function

It will ease integration for x86_64

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 21 insertions, 20 deletions

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 02427d1003d3..ddb94ef37789 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -45,10 +45,8 @@ unsigned char *trampoline_base = __va(SMP_TRAMPOLINE_BASE);
 /* representing cpus for which sibling maps can be computed */
 static cpumask_t cpu_sibling_setup_map;
 
-#ifdef CONFIG_X86_32
 /* Set if we find a B stepping CPU */
 int __cpuinitdata smp_b_stepping;
-#endif
 
 static void __cpuinit smp_apply_quirks(struct cpuinfo_x86 *c)
 {
@@ -105,6 +103,25 @@ valid_k7:
 #endif
 }
 
+void smp_checks(void)
+{
+        if (smp_b_stepping)
+                printk(KERN_WARNING "WARNING: SMP operation may be unreliable"
+                                    "with B stepping processors.\n");
+
+        /*
+         * Don't taint if we are running SMP kernel on a single non-MP
+         * approved Athlon
+         */
+        if (tainted & TAINT_UNSAFE_SMP) {
+                if (cpus_weight(cpu_present_map))
+                        printk(KERN_INFO "WARNING: This combination of AMD"
+                                "processors is not suitable for SMP.\n");
+                else
+                        tainted &= ~TAINT_UNSAFE_SMP;
+        }
+}
+
 /*
  * The bootstrap kernel entry code has set these up. Save them for
  * a given CPU
diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c
index 34493f8ba8ac..361851cdaa97 100644
--- a/arch/x86/kernel/smpboot_32.c
+++ b/arch/x86/kernel/smpboot_32.c
@@ -59,8 +59,6 @@
 #include <asm/vmi.h>
 #include <asm/mtrr.h>
 
-extern int smp_b_stepping;
-
 static cpumask_t smp_commenced_mask;
 
 /* which logical CPU number maps to which CPU (physical APIC ID) */
@@ -791,6 +789,7 @@ static int __init smp_sanity_check(unsigned max_cpus)
 }
 
 extern void impress_friends(void);
+extern void smp_checks(void);
 /*
  * Cycle through the processors sending APIC IPIs to boot each.
  */
@@ -865,22 +864,7 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
 
         impress_friends();
 
-        if (smp_b_stepping)
-                printk(KERN_WARNING "WARNING: SMP operation may be unreliable with B stepping processors.\n");
-
-        /*
-         * Don't taint if we are running SMP kernel on a single non-MP
-         * approved Athlon
-         */
-        if (tainted & TAINT_UNSAFE_SMP) {
-                if (cpus_weight(cpu_present_map))
-                        printk (KERN_INFO "WARNING: This combination of AMD processors is not suitable for SMP.\n");
-                else
-                        tainted &= ~TAINT_UNSAFE_SMP;
-        }
-
-        Dprintk("Boot done.\n");
-
+        smp_checks();
         /*
          * construct cpu_sibling_map, so that we can tell sibling CPUs
          * efficiently.