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authorIngo Molnar <mingo@elte.hu>2008-06-16 11:20:57 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-16 11:20:57 +0200
commitfd2c17e1777d46cff14c25ea774a4d17459d188a (patch)
treee8299216de8e99418195ba64bcf8f679df3a66b3 /arch/x86/kernel/smpboot.c
parent74e411cb6443d8bcb55fbe89fcc7a9ee574df91b (diff)
parent066519068ad2fbe98c7f45552b1f592903a9c8c8 (diff)
Merge branch 'linus' into x86/timerstip-x86-timers-2008-06-16_09.20_Mon
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
-rw-r--r--arch/x86/kernel/smpboot.c29
1 files changed, 21 insertions, 8 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 6b087ab6cd8f..56078d61c793 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -86,6 +86,7 @@ void *x86_bios_cpu_apicid_early_ptr;
#ifdef CONFIG_X86_32
u8 apicid_2_node[MAX_APICID];
+static int low_mappings;
#endif
/* State of each CPU */
@@ -326,6 +327,12 @@ static void __cpuinit start_secondary(void *unused)
enable_8259A_irq(0);
}
+#ifdef CONFIG_X86_32
+ while (low_mappings)
+ cpu_relax();
+ __flush_tlb_all();
+#endif
+
/* This must be done before setting cpu_online_map */
set_cpu_sibling_map(raw_smp_processor_id());
wmb();
@@ -1040,14 +1047,20 @@ int __cpuinit native_cpu_up(unsigned int cpu)
#ifdef CONFIG_X86_32
/* init low mem mapping */
clone_pgd_range(swapper_pg_dir, swapper_pg_dir + KERNEL_PGD_BOUNDARY,
- min_t(unsigned long, KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY));
+ min_t(unsigned long, KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY));
flush_tlb_all();
-#endif
+ low_mappings = 1;
+
+ err = do_boot_cpu(apicid, cpu);
+ zap_low_mappings();
+ low_mappings = 0;
+#else
err = do_boot_cpu(apicid, cpu);
- if (err < 0) {
+#endif
+ if (err) {
Dprintk("do_boot_cpu failed %d\n", err);
- return err;
+ return -EIO;
}
/*
@@ -1177,6 +1190,7 @@ static void __init smp_cpu_index_default(void)
*/
void __init native_smp_prepare_cpus(unsigned int max_cpus)
{
+ preempt_disable();
nmi_watchdog_default();
smp_cpu_index_default();
current_cpu_data = boot_cpu_data;
@@ -1193,7 +1207,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
if (smp_sanity_check(max_cpus) < 0) {
printk(KERN_INFO "SMP disabled\n");
disable_smp();
- return;
+ goto out;
}
preempt_disable();
@@ -1233,6 +1247,8 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
printk(KERN_INFO "CPU%d: ", 0);
print_cpu_info(&cpu_data(0));
setup_boot_clock();
+out:
+ preempt_enable();
}
/*
* Early setup to make printk work.
@@ -1259,9 +1275,6 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
setup_ioapic_dest();
#endif
check_nmi_watchdog();
-#ifdef CONFIG_X86_32
- zap_low_mappings();
-#endif
}
#ifdef CONFIG_HOTPLUG_CPU