diff options
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 02427d1003d..ddb94ef3778 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 |