diff options
| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-03-19 14:25:28 -0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:01 +0200 |
| commit | 693d4b8a6429af7f2029df20a59e22f4d752e141 (patch) | |
| tree | 512a24d553a31eedb5aa69a1382c861c13491ac5 /arch/x86/kernel/smpboot.c | |
| parent | 904541e2f76bc3efe4cc9978b7adb3323ea8607e (diff) | |
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>
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 |