summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--arch/x86/Kconfig4
-rw-r--r--arch/x86/kernel/apic/apic.c7
-rw-r--r--include/linux/smp.h7
-rw-r--r--init/main.c13
4 files changed, 18 insertions, 13 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ba397bde7948..ffcc3ca5862a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -855,6 +855,10 @@ config SCHED_MC
source "kernel/Kconfig.preempt"
+config UP_LATE_INIT
+ def_bool y
+ depends on X86_UP_APIC
+
config X86_UP_APIC
bool "Local APIC support on uniprocessors"
depends on X86_32 && !SMP && !X86_32_NON_STANDARD && !PCI_MSI
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index c681e9ba9e47..19f1bc714ee6 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2267,6 +2267,13 @@ int __init APIC_init_uniprocessor(void)
return 0;
}
+#ifdef CONFIG_UP_LATE_INIT
+void __init up_late_init(void)
+{
+ APIC_init_uniprocessor();
+}
+#endif
+
/*
* Power management
*/
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 93dff5fff524..be91db2a7017 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -151,6 +151,13 @@ smp_call_function_any(const struct cpumask *mask, smp_call_func_t func,
static inline void kick_all_cpus_sync(void) { }
static inline void wake_up_all_idle_cpus(void) { }
+#ifdef CONFIG_UP_LATE_INIT
+extern void __init up_late_init(void);
+static inline void smp_init(void) { up_late_init(); }
+#else
+static inline void smp_init(void) { }
+#endif
+
#endif /* !SMP */
/*
diff --git a/init/main.c b/init/main.c
index 61b993767db5..179ada15d08a 100644
--- a/init/main.c
+++ b/init/main.c
@@ -87,10 +87,6 @@
#include <asm/sections.h>
#include <asm/cacheflush.h>
-#ifdef CONFIG_X86_LOCAL_APIC
-#include <asm/smp.h>
-#endif
-
static int kernel_init(void *);
extern void init_IRQ(void);
@@ -351,15 +347,6 @@ __setup("rdinit=", rdinit_setup);
#ifndef CONFIG_SMP
static const unsigned int setup_max_cpus = NR_CPUS;
-#ifdef CONFIG_X86_LOCAL_APIC
-static void __init smp_init(void)
-{
- APIC_init_uniprocessor();
-}
-#else
-#define smp_init() do { } while (0)
-#endif
-
static inline void setup_nr_cpu_ids(void) { }
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#endif