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>
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 02427d1..ddb94ef 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -45,10 +45,8 @@
/* 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 @@
#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