Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6

[linux-2.6] / arch / x86 / kernel / cpu / intel.c

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 70609efdf1da3ae7fea3a311ffbb1639e3f5675e..b75f2569b8f8ba1940d55ce3616f25a91c7c6d75 100644 (file)
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -227,6 +227,16 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
        if (cpu_has_bts)
                ds_init_intel(c);
 
+       /*
+        * See if we have a good local APIC by checking for buggy Pentia,
+        * i.e. all B steppings and the C2 stepping of P54C when using their
+        * integrated APIC (see 11AP erratum in "Pentium Processor
+        * Specification Update").
+        */
+       if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 &&
+           (c->x86_mask < 0x6 || c->x86_mask == 0xb))
+               set_cpu_cap(c, X86_FEATURE_11AP);
+
 #ifdef CONFIG_X86_NUMAQ
        numaq_tsc_disable();
 #endif